JP2011093725A - Ceramics for ornamental piece, and ornamental piece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide ceramics for an ornamental piece having excellent wear resistance, high hardness and high rigidity and a gold tone that continues to give users high grade feeling, aesthetic satisfaction and mental comfort for a long time. <P>SOLUTION: The ceramics for an ornamental piece include titanium nitride as a main component, at least either one of zirconium oxide and aluminum oxide, boron and titanium boride. The oxide suppresses crystal particles of the titanium nitride in the surface layer of the ceramics for an ornamental piece from expanding in volume when oxidized and thus from falling out, which improves wear resistance. The contained boron has such good wettability to titanium nitride and titanium boride to function as a binder for firmly binding the titanium compounds and to suppress the titanium boride of high hardness from decomposing, which maintains high hardness of the ceramics. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a ceramic for decorative parts that produces a golden color tone and a decorative part made of the ceramic for decorative parts.

  Conventionally, pure gold, alloys of these, and various metals such as brass have been used for parts that require a golden color tone used in decorative parts, but all of them are low in hardness, so they are damaged by contact with hard materials. It was easy. Moreover, although the surface of the base material with gold plating was used, the gold plating was easily peeled off by contact with or friction with a hard substance.

  In addition, a hard coating that forms a DLC (Diamond Like Carbon) film by CVD (Chemical Vapor Deposition) that forms a base layer on the surface of the substrate and excites the gas into a plasma state. Although the wear resistance and hardness can be improved, there is a problem that the surface of the decorative part is easily damaged because the wear resistance and hardness are not sufficient, and the decorativeness is gradually deteriorated.

  Therefore, in order to solve such problems, ceramics having excellent mechanical properties are being used. As shown in Patent Document 1, the applicant of the present application includes at least titanium, nitrogen, and boron as constituent elements. A sintered body comprising 80 to 95% by weight of titanium in the total amount, 3 to 12% by weight of boron in the total amount, and 2 to 8% by weight of nitrogen in the total amount, and the TiN phase and TiB in the sintered body. A gold sintered body containing a phase as the main crystal phase was proposed. According to this, it has high strength and hardness, high toughness and corrosion resistance, and since a golden mirror surface appears easily due to improved sinterability and there is no elution of metal causing allergies, For example, it can be applied to fishing line guiding decorative parts and watch decorative parts as a golden decorative article that does not cause corrosion or scratches and is not harmful to humans.

JP 9-1557027 A

  However, the gold-sintered body proposed by the present applicant in Patent Document 1 is less likely to cause metal allergy due to the reduction of metals such as nickel and chromium, and has a bending strength, Vickers hardness, fracture due to the TiB phase. Although mechanical properties such as toughness have been improved, when it is intended to be used for decorative parts for fishing line guides, the decorative parts for fishing line guides are currently required to have further improved wear resistance. It was not enough. Further, in order to use this golden sintered body as a decorative part, it is required to have a golden color tone that can give a high-class feeling, aesthetic satisfaction and mental comfort in addition to the above mechanical characteristics. .

  The present invention has been devised to solve the above-described problems, and has a golden color tone that has excellent mechanical properties and can give a consumer a sense of luxury, aesthetic satisfaction, and mental comfort for a long period of time. It is an object of the present invention to provide a ceramic for decorative parts and a decorative part made of the ceramic for decorative parts.

  The ceramic for decorative parts of the present invention is characterized by comprising titanium nitride as a main component and containing at least one of zirconium oxide and aluminum oxide, boron, and titanium boride.

  Further, the ceramic for decorative parts of the present invention has the above-described structure, wherein the content of at least one of the zirconium oxide and the aluminum oxide is 7% by mass or more and 18% by mass or less, and the content of the boron and the above The total content of boron constituting titanium boride is 3% by mass or more and 14% by mass or less.

  In addition, the ceramic for decorative parts of the present invention is characterized in that, in any of the above-described configurations, manganese is further contained in a range of 0.1 mass% to 1 mass%.

  In the ceramic for decorative parts of the present invention, the brightness index L * in the CIE1976L * a * b * color space of the decorative surface is 63 or more and 75 or less, and the chromaticness index a *, b * is any one of the above-described configurations. Are 4 or more and 7 or less and 13 or more and 23 or less, respectively.

  The fishing line guiding decorative part of the present invention is characterized by comprising the decorative part ceramics of the present invention having any one of the above-described configurations.

  In the composite decorative part of the present invention, a decorative part made of the ceramic for decorative parts of the present invention having any one of the above structures and a decorative part having a decorative surface of a color different from that of the ceramic for decorative parts are arranged side by side. It is characterized by this.

  According to the ceramic for decorative parts of the present invention, since titanium nitride is the main component and at least one of aluminum oxide and zirconium oxide, titanium boride, and boron are contained, titanium nitride on the surface layer of the ceramic for decorative parts At least one of aluminum oxide and zirconium oxide can suppress the volume expansion when the crystal grains are oxidized, and the grain breakage of the crystal grains can be suppressed, so that the wear resistance can be improved. In addition, since boron contains good wettability to titanium nitride and titanium boride, it acts as a binder that firmly bonds titanium nitride crystal particles to each other and between titanium nitride crystal particles and titanium boride crystal particles. At the same time, it is possible to maintain high hardness by suppressing the decomposition of titanium boride having high hardness. In addition, since titanium boride has high hardness, it can improve wear resistance, and since it has high conductivity, the generation of static electricity due to contact with other substances can be suppressed by including titanium boride. Therefore, it is possible to suppress the adhesion of particles.

  Further, according to the ceramic for decorative parts of the present invention, the content of at least one of zirconium oxide and aluminum oxide is 7% by mass or more and 18% by mass or less, and constitutes the boron content and titanium boride. When the total boron content is 3% by mass or more and 14% by mass or less, at least one of aluminum oxide and zirconium oxide can be sufficiently dissolved in the crystal grains of titanium nitride. Since the particles are more difficult to fall apart, the wear resistance can be improved.

  Further, according to the ceramic for decorative parts of the present invention, when manganese is further contained in the range of 0.1% by mass or more and 1% by mass or less, the ionization tendency is large, and the oxidation of granules obtained by spray drying due to strong oxygen adsorption action. Can be suppressed, and variations in the color tone of the decorative surface can be suppressed.

  Further, according to the ceramic for decorative parts of the present invention, the lightness index L * in the CIE1976L * a * b * color space of the decorative surface is 63 or more and 75 or less, and the chromaticness indices a * and b * are 4 or more and 7 respectively. Below, when it is 13 or more and 23 or less, it becomes a golden color having moderate brightness and vividness, and it can continue to provide high-class feeling, aesthetic satisfaction and mental comfort over a long period of time.

In addition, according to the fishing line guiding decorative part of the present invention made of the ceramic for decorative part of the present invention, the surface has high hardness even when rubbed against fine sand adhered to the fishing line when guiding the fishing line. It is possible to withstand long-term use while maintaining a golden color tone.
Further, according to the composite decorative component of the present invention, when the decorative component ceramic of the present invention and the decorative component having a decorative surface of a different color tone are arranged side by side, for example, if the different color tone is purple, the present invention The combination with the golden color of the ceramics for decorative parts can stimulate consumers' willingness to purchase when used in store advertisements and interior goods that require decoration. In addition, when the different color tone is black, the combination with the golden color of the color tone exhibited by the ceramic for decorative parts of the present invention increases the visibility and is required to be viewed from a distance, for example, a display component such as a guide plate Can be suitably used. Further, if the different color tone is silver, it is more luxurious and can enhance the decorativeness.

An example of a fishing line guide ring and a fishing line guide provided with this fishing line guide ring, which are decorative parts for guiding a fishing line of the present invention, (a) is a perspective view of the fishing line guide ring, (b) is ( It is a perspective view of the guide for fishing lines provided with the guide ring for fishing lines of a). It is the schematic diagram which planarly viewed the decoration surface which shows an example of the composite decoration component of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an example of a fishing line guide ring that is a decorative part for fishing line guide according to the present invention and a fishing rod equipped with the fishing line guide ring. It is a schematic block diagram of the abrasion resistance evaluation apparatus for evaluating the abrasion resistance of the ceramics for decorative parts of this invention. An example of a watch case which is a watch decorative part made of ceramics for decorative parts of the present invention is shown, (a) is a perspective view of the watch case viewed from the front side, and (b) is a watch case of (a). It is the perspective view which looked at the case from the back side. It is a perspective view which shows another example of the case for timepieces which is the decorative part for timepieces which consists of ceramics for decorative parts of this invention. It is a schematic diagram which shows an example of a structure of the timepiece band which is the timepiece decorative part which consists of ceramics for decorative parts of this invention. It is a perspective view which shows an example of the mobile telephone using the decorative component for portable terminals which consists of ceramics for decorative components of this invention. It is a perspective view which shows an example of the state where the housing | casing of the mobile telephone using the decorative component for portable terminals which consists of ceramics for decorative components of this invention was opened. It is a schematic diagram which shows an example of a structure of the soap case using the decorative part for daily goods which consists of ceramics for decorative parts of this invention. It is a perspective view which shows an example of the coffee cup set which is a decorative part for daily goods which consists of ceramics for decorative parts of this invention. It is a perspective view which shows an example of the vehicle body which attached the decorative component for vehicle articles which consists of ceramics for decorative components of this invention. It is a front view which shows an example of the corner pole using the decorative component for vehicle articles which consists of ceramics for decorative components of this invention. It is a front view which shows an example of the golf club using the decorative component for sports goods which consists of ceramics for decorative components of this invention. It is a bottom view which shows an example of the spike shoes using the decorative part for sporting goods which consists of ceramics for decorative parts of this invention. It is a perspective view which shows an example of the guitar using the decorative component for musical instruments which consists of ceramics for decorative components of this invention. It is a schematic diagram which shows an example of the artificial dental crown using the decorative part for accessories which consists of ceramics for decorative parts of this invention. It is a front view which shows an example of the earphone unit using the decorative part for accessories made of ceramics for decorative parts of the present invention. It is a perspective view which shows an example of the spectacles using the decorative part for accessories which consists of ceramics for decorative parts of this invention.

  Examples of embodiments of the ceramic for decorative parts of the present invention will be described below.

  The ceramic for decorative parts of the present invention contains titanium nitride as a main component and contains at least one of zirconium oxide and aluminum oxide, boron, and titanium boride. In addition, the main component here is a component which occupies 50 mass% or more with respect to 100 mass% of all the components which comprise ceramics for decorative parts. Titanium nitride, which is the main component, exhibits a good golden color tone as a decorative part and has high mechanical properties such as strength and hardness. Therefore, in the ceramic for decorative parts of the present invention, It is preferable to contain titanium nitride in a content of 70% by mass or more.

  Moreover, abrasion resistance can be improved by including at least 1 sort (s) of a zirconium oxide and an aluminum oxide. When sweat or muddy water adheres to ceramics containing titanium nitride as the main component, boron and titanium boride, and not containing at least one of zirconium oxide and aluminum oxide, the surface titanium nitride crystal particles are oxidized. Then, when it becomes titanium oxide, it becomes in a state where it is easily expanded by volume expansion. On the other hand, even if sweat, muddy water, or the like adheres to a ceramic containing titanium nitride as a main component, containing boron and titanium boride and containing at least one of aluminum oxide and zirconium oxide, at least one of aluminum oxide and zirconium oxide. Since the seed crystal grains can suppress the volume expansion when the titanium nitride crystal grains on the surface layer of the ceramic are oxidized and suppress the degranulation, the wear resistance can be improved.

  Further, when boron is contained, the boron acts as a binder for firmly bonding the titanium nitride crystal particles to each other, so that fracture toughness and rigidity can be improved. In addition, titanium boride has high hardness, thermal conductivity, electrical conductivity, and corrosion resistance. Therefore, these characteristics can be improved by including titanium boride.

  Note that boron (B) may be either amorphous boron or crystalline boron, but amorphous boron is boron in a state in which many particles smaller than crystalline boron are filled, so that the mechanical strength is improved. Can be made.

  Thus, since the ceramic for decorative parts of the present invention has particularly high rigidity, even if it is processed into a complicated shape to increase the decorative value, it is not deformed even by such a large force. It can be processed precisely. Therefore, the ceramics for decorative parts of the present invention has excellent wear resistance and fracture toughness, high hardness and rigidity, and a golden color with high decorative value. And can provide mental comfort over a long period of time.

  In the ceramic for decorative parts of the present invention, the content of at least one of zirconium oxide and aluminum oxide is 7% by mass or more and 18% by mass or less, and the boron content and the content of boron constituting titanium boride. Is preferably 3% by mass or more and 14% by mass or less.

  The content of at least one of aluminum oxide and zirconium oxide is 7% by mass or more and 18% by mass or less, and the combined content of boron and boron constituting titanium boride is 3% by mass or more and 14% by mass or less. In some cases, at least one of aluminum oxide and zirconium oxide can be sufficiently dissolved in the titanium nitride crystal particles, so that the titanium nitride crystal particles are more difficult to fall off, thereby improving wear resistance. Can do. Further, if the boron content is within the above range, the vividness is not impaired, so that both high hardness and vividness can be achieved.

  Moreover, the ceramic for decorative parts of the present invention preferably further contains manganese in the range of 0.1% by mass to 1% by mass. By containing manganese in this range, the ionization tendency is large, and due to the strong oxygen adsorption action, the oxidation of the granules obtained by spray drying can be suppressed, and variations in the color tone of the decorative surface can be suppressed.

  In the decorative part ceramics of the present invention, the nickel content is 2% by mass or more and 10% by mass or less, and the content when chromium is converted to carbide is 1% by mass or more and 5% by mass or less. Is preferred.

  In addition, if the nickel content is 2% by mass or more and 10% by mass or less, the fracture toughness acts as a binder for firmly bonding the crystal grains of titanium nitride without substantially reducing the hardness of the ceramic for decorative parts. And the rigidity can be improved.

  In addition, if the content of chromium in terms of carbide is 1% by mass or more and 5% by mass or less, it reacts with nickel to produce a compound, which suppresses nickel from ionizing and flowing out, and for decorative parts. Vividness can be given to the color of the ceramic.

  The nitrogen of titanium nitride constituting the ceramic for decorative parts of the present invention is obtained by a thermal conductivity method, and the contents of zirconium oxide, aluminum oxide, boron and manganese are determined by X-ray fluorescence analysis or ICP (Inductively Coupled Plasma). ) It can be determined by emission analysis. Specifically, for titanium nitride, the content of element N is measured and converted to nitride, and for aluminum oxide and zirconium oxide, the content of each element Al and Zr is measured and converted to oxide. That's fine. Moreover, about boron and manganese, the measured value of each element B and Mn becomes content. In addition, about titanium nitride, without measuring, it is good also considering the sum of each content of aluminum oxide, zirconium oxide, boron, and manganese as 100 mass%, and subtracting from this value as content of titanium nitride.

  Furthermore, when the ceramic for decorative parts of the present invention contains nickel or chromium carbide, the contents of nickel and chromium carbide can also be determined by fluorescent X-ray analysis or ICP (Inductively Coupled Plasma) emission analysis. Specifically, for nickel, the measured value of element Ni is the content, and for chromium carbide, the content of element Cr may be measured and converted to carbide.

  In the ceramic for decorative parts of the present invention, the value of the brightness index L * in the CIE1976L * a * b * color space of the decorative surface is 63 or more and 75 or less, and the chromaticness index a * and b * is 4 respectively. It is preferably 7 or less and 13 or more and 23 or less. If it is this range, it will become the golden color tone which has moderate brightness and vividness, and can provide a high-class feeling, aesthetic satisfaction, and mental comfort for a long period of time.

  Here, the decorative surface in the ceramic for decorative parts of the present invention refers to a surface that requires a decorative value of the decorative component, and does not need to include a surface that does not require a decorative value. is not. For example, when the ceramics for decorative parts of the present invention is used for a watch case, the outer surface of the watch case is a decorative surface because it is an object of appreciation and requires decorative value. The inner surface or the like into which the timepiece driving mechanism is fitted is not a decorative surface because it usually does not require a decorative value.

  The lightness index L * is an index indicating the lightness and darkness of the color tone. When the value of the lightness index L * is large, the color tone is bright, and when the value of the lightness index L * is small, the color tone is dark. The chromaticness index a * is an index indicating the degree of red to green color tone. When the value of a * increases in the positive direction, the color tone becomes red. As the absolute value decreases, the color tone becomes less vivid. The color tone becomes dull, and if the value of a * is large in the negative direction, the color tone becomes green. Further, the chromaticness index b * is an index indicating the degree of yellow to blue of the color tone. When the value of b * increases in the positive direction, the color tone becomes yellow, and as the absolute value decreases, the color tone becomes less vivid. The color tone becomes dull when the b * value is large in the negative direction.

  The value of the brightness index L * and the value of the chromaticness index a *, b * in the CIE1976 L * a * b * color space of such a decorative surface is obtained by measuring in accordance with JIS Z 8722-2000. It is done. For example, using a spectrocolorimeter (such as CM-3700d manufactured by Konica Minolta), the light source can be measured by setting the CIE standard light source D65, the viewing angle 10 °, and the measurement range 5 mm × 7 mm.

  Further, since the arithmetic average height Ra of the decorative surface affects the reflectance of light and changes the color tone, the arithmetic average height Ra of the decorative surface is preferably set to 0.03 μm or less. Thereby, the reflectance of light becomes high and the value of the brightness index L * can be increased. When the arithmetic average height Ra exceeds 0.03 μm, the value of the lightness index L * is lowered, the color tone becomes dark, and there is a possibility that the high-class feeling is lowered.

  This light is a set of visible light in the wavelength range of 380 to 780 nm. By setting the arithmetic average height Ra to 0.03 μm or less, the visible light is dispersed to reflect light in the wavelength range of 450 to 500 nm indicating blue. In addition, it acts to increase the reflection of light in the wavelength range of 570 to 590 nm showing yellow, so that it can exhibit a golden color that gives a sense of luxury, aesthetic satisfaction, mental comfort, and the like. In particular, the reflectance of the decorative surface with respect to light having a wavelength range of 570 to 700 nm is preferably 50% or more.

  The arithmetic average height Ra may be measured according to JIS B 0601-2001, and the measurement length and cut-off value are 5 mm and 0.8 mm, respectively, and are measured using a stylus type surface roughness meter. In this case, for example, a stylus having a radius of 2 μm is applied to the decorative surface of the ceramic for decorative parts, and the scanning speed of the stylus is set to 0.5 mm / second. Is the arithmetic average height Ra.

  Further, in the ceramic for decorative parts of the present invention, the open porosity on the decorative surface affects the value of the lightness index L *. When the open porosity is high, the value of the lightness index L * is small and the open porosity is low. And the value of the lightness index L * increases. Therefore, the open porosity on the decorative surface is preferably 2.5% or less, and more preferably 1.1% or less.

Note that the open porosity on the decorative surface is obtained by using a metallurgical microscope to capture an image of the decorative surface with a CCD camera at a magnification of 200 times, and using an image analyzer (such as LUZEX-FS manufactured by Nireco) Obtain the area of open pores when the measurement area is 2.25 × 10 ⁻² mm ² , the number of measurement fields is 20, that is, the measurement total area is 4.5 × 10 ⁻¹ mm ^{2, and} the ratio of the total measurement area is the open porosity of the decorative surface do it.

Further, in the ceramic for decorative parts of the present invention, it is preferable that 0.8 ≦ x ≦ 0.96 when the composition formula of titanium nitride as a main component is TiN _x . The color tone is affected by the value of the number of atoms x when the composition formula is TiN _x . When the number of atoms x decreases, the color tone changes from golden to light golden, and when the number of atoms x increases, the color tone becomes dull and deep golden. From this point of view, the value of the number of atoms x when the composition formula is TiN _x is preferably 0.8 or more and 0.96 or less. When the value of the number of atoms x is within this range, the glossy color tone is further improved. As a result, higher luxury and aesthetic satisfaction can be obtained.

Furthermore, in the ceramic for decorative parts of the present invention, a part of nitrogen constituting the main component titanium nitride is substituted with boron, and the composition formula of titanium nitride is TiB _1-x N _x (where x is 0.8 ≦ x ≦ 0.96)). When the number of nitrogen atoms x is replaced with boron having a high hardness within the above range, the hardness is increased, so that the wear resistance is improved and the oxidation start temperature is also increased. Variations in color tone that may be feared are less likely to occur.

  And the decorative component for fishing line guide of the present invention is characterized by comprising the ceramic for decorative component of the present invention having the above-described configuration, and specific examples thereof include a guide ring for fishing line and a fishing line guide equipped with the same. is there.

  FIG. 1 shows an example of a fishing line guide ring which is a decorative part for fishing line guide according to the present invention and a fishing line guide provided with the fishing line guide ring. FIG. 1A is a plan view of the fishing line guide ring. (B) is a perspective view of the fishing line guide provided with the fishing line guide ring of (a).

  The fishing line guide ring 1 of the example shown in FIG. 1 is for guiding a fishing line (not shown) through the inner periphery thereof, and the fishing line guide 6 is a holding portion 2 that holds the fishing line guide ring 1. The fishing line guide ring 1 is provided on a frame 5 integrally formed with a support portion 3 of the holding portion 2 and a fixing portion 4 that is fixed to a fishing rod (not shown). By forming this fishing line guide ring 1 with the ceramics for decorative parts of the present invention, it is possible to give the consumer a sense of quality, aesthetic satisfaction and mental comfort.

  Further, since the fishing line guide ring 1 having a golden color tone and the color tone of the fishing line guide 6 and the fishing rod are in good harmony, the fishing line guide ring 1 can be suitably used for fishing gear. In particular, since it exhibits a golden color tone, it can be used as a fishing tackle preferred by those who want a high-class feeling as a luxury item. The surface of the fishing line guide ring 1 may be covered with a transparent film having high wear resistance, for example, a film made of amorphous hard carbon to further improve the wear resistance.

  Next, FIGS. 2A to 2F are schematic views in plan view of a decorative surface showing an example of the composite decorative component of the present invention.

  The composite decorative component 10 shown in FIGS. 2 (a) to 2 (f) is a decorative component ceramic 11 of the present invention that exhibits a golden color when the decorative surface is viewed in plan, and a decorative surface having a color tone different from the ceramic 11 for decorative component. This is an example in which a decorative part 12 having As the shapes of the decorative part ceramics 11 and the decorative part 12, FIG. 2 (a) is a triangular shape, (b) is a quadrangular shape, and (c) is a parallelogram shape. d) is a combination of a hexagonal shape and a triangular shape, (e) is a combination of an octagonal shape and a quadrangular shape, and (f) is a decorative component that surrounds the rectangular decorative component 12 and the decorative component 12. It is a combination with ceramics 11 for use.

  And, as a color tone different from the ceramics 11 for decorative parts, specifically, if the color tone of the decorative part 12 is purple, it stimulates consumers' willingness to purchase when used in store advertisements and interior goods that require decoration can do.

  If the color of the decorative component 12 is black, the combination with the golden color of the color tone exhibited by the ceramic 11 for decorative components of the present invention increases the visibility and is required to be viewed from a distance, for example, a guide plate It can be suitably used as a display component. Furthermore, if the color tone of the decorative component 2 is silver, it is possible to enhance the decorativeness that is more luxurious.

  The decorative part 12 only needs to have a color tone different from that of the decorative part ceramics 11 of the present invention and enhances the decorativeness. Therefore, the material is not limited, and the shape and combination of the decorative part ceramics 11 and the decorative part 12 are not limited. Needless to say, these are not limited to those shown in FIGS.

  FIG. 3 is a perspective view showing an example of a fishing line guide ring which is a decorative part for fishing line guide of the present invention and a fishing rod provided with the fishing line guide ring.

  The fishing rod 20 shown in FIG. 3 is, for example, a fishing rod provided with a fishing line guide ring 1a and 1c, and a fishing line guide ring 1b and 1d having a purple or black color tone. Alternatively, 1b and 1d may be a fishing line guide ring which is a decorative part for fishing line guide according to the present invention, and 1a and 1b may be a fishing rod provided with a fishing line guide ring whose color tone is purple or black. In this way, by using the fishing line guide rings having different color tones as the adjacent fishing line guide rings, it is possible to enjoy the color tone in addition to enjoying fishing itself.

  In addition, the abrasion resistance of the ceramic for decorative parts of the present invention can be evaluated by preparing and using an abrasion resistance evaluation apparatus having the following configuration.

  FIG. 4 is a schematic configuration diagram of an abrasion resistance evaluation apparatus used for evaluating the abrasion resistance of the ceramic for decorative parts of the present invention. This wear resistance evaluation apparatus 30 is connected to a thread 32 made of nylon, a plurality of pulleys 33 that apply tension to the thread 32 at a predetermined position, and a pulley 33a that is one of the pulleys 33. It consists of a motor (not shown) that travels in the direction and a water tank 34 that attaches muddy water to the thread 32. It is structured to slide on the outer peripheral surface of a cylindrical decorative part ceramic 31 fixed by a jig (not shown) or the like, and the number of nylon threads 32 may be, for example, 3 .

  Conditions for evaluating the wear resistance of the ceramic 31 for decorative parts using this wear resistance evaluation apparatus 30 are, for example, that the mass of the weight 35 is 500 g and the thread 32 is a cylindrical ceramic 31 for decorative parts. What is necessary is just to set so that the speed which slides the outer periphery of 60m / min. Then, after driving the motor and sliding the thread 32, the deepest part of the scratches caused by the wear of the cylindrical ceramics 31 for decorative parts was measured with a surface shape measuring microscope (measurement unit VF-7510 / keyboard VF manufactured by Keyence). -7500), and the wear resistance can be evaluated by comparing the measured values.

  FIG. 5 shows an example of a watch case which is a watch decorative part made of ceramics for decorative parts of the present invention, (a) is a perspective view of the watch case as viewed from the front side, and (b) It is the perspective view which looked at the case for timepieces of (a) from the back side. FIG. 6 is a perspective view showing another example of a watch case which is a decorative part for watch of the present invention. FIG. 7 is a schematic view showing an example of the configuration of a watch band which is a decorative part for watch of the present invention. In addition, when showing the same site | part in these figures, the same code | symbol is attached | subjected.

  The watch case 40A of the example shown in FIG. 5 includes a recess 41 that houses a movement (drive mechanism) (not shown) and a foot portion 42 that fixes a watch band (not shown) for mounting the watch on an arm. The concave portion 41 includes a thin bottom portion 43 and a thick body portion 44. Further, the watch case 40B of the example shown in FIG. 6 has a body portion 44 for fixing a hole portion 45 for receiving a movement (drive mechanism) (not shown) and a watch band (not shown) for mounting the watch on the arm. And a foot portion 42 formed on the head.

  The band piece constituting the watch band 50 of the example shown in FIG. 7 is arranged so as to sandwich the intermediate piece 52 having the through hole 53 into which the pin 55 is inserted and the intermediate piece 52, and both ends of the pin 55 are inserted. And an outer piece 51 having a pin hole 54 to be inserted, and a pin 55 is inserted into the through hole 53 of the middle piece 52, and both ends of the inserted pin 55 are inserted into the pin holes 54 of the outer piece 51. The watch piece 50 is configured by sequentially connecting the middle piece 52 and the outer piece 51.

  Moreover, since the tensile load is frequently applied to the middle piece 52, a tensile strength of 196 N or more is required. To obtain this tensile strength, after inserting a cemented carbide pin (not shown) longer than the length of the through-hole 53 into the through-holes 53a and 53b of the intermediate piece 52, the pin is pulled in the direction of separating, The strength when 52 is destroyed can be read with a load cell.

  Since the watch decorative parts of the present invention used as the band pieces constituting the watch cases 40A and 40B and the watch band 50 are made of the ceramics for decorative parts of the present invention, a high-class feeling as a watch. ， You can get enough aesthetic satisfaction and you can get mental comfort through vision.

  Next, FIG. 8 is a perspective view showing an example of a mobile phone using a decorative part for a portable terminal made of the ceramic for decorative parts of the present invention, and FIG. 9 is a housing of the mobile phone of the example shown in FIG. It is a perspective view which shows the state which opened the body.

  The decorative part for a portable terminal according to the present invention is characterized by comprising the ceramic for decorative part according to the present invention. Specific examples thereof include various keys and cases operated by pressing as shown in FIGS.

  The mobile phone 60 in the example shown in FIG. 8 includes a mode key 61a for changing the mode of the mobile phone 60 to a radio mode that is a mode for listening to radio, a music mode that is a mode for listening to music, and the like. The first casing 62 is provided with a manner key 61b for detecting a touch of a finger or the like, and a touch sensor 63 for inputting an input by the contact, a camera 64 for imaging a subject, a light 65, and a touch sensor. The second casing 67 is provided with a slide switch 66 for setting validity or invalidity of an input such as 63.

  9 shows a state in which the second casing 67 is opened, and the first casing 62 and the second casing 67 are connected via a hinge 68. Thus, the second casing 67 can be freely opened and closed. The second casing 67 includes a front case 69a and a rear case 69b, and a liquid crystal display unit 70 is provided in the front case 69a.

  The first housing 62 also has a front case 71a and a rear case 71b. The front case 71a is provided with various keys to be operated. This key includes a numeric keypad 72a for inputting a telephone number and the like, a cursor movement key 72b for moving a cursor for various function menus, a call key 72c for starting a call by pressing when receiving an incoming call, turning on / off a power supply and pressing during a call There are a power / end key 72d for ending the call and function keys 73L, 73R arranged on the left and right of the center key 72f arranged at the center of the cursor movement key 72b.

  Front cases 69a and 71a, rear cases 69b and 71b, which are upper case, numeric keys 72a which are keys to be operated, cursor movement key 72b, call key 72c, power / end key 72d, center key 72f, function key 73L By forming at least one of R, R, etc. with the ceramics for decorative parts of the present invention, a cellular phone that gives a consumer a sense of luxury, aesthetic satisfaction and mental comfort over a long period of time and exhibits such a color tone You can feel the satisfaction of owning. Moreover, since the ceramic for decorative parts of the present invention has good compatibility with other color tones, it can be used in combination with members of various color tones, so that it is possible to meet diversification of consumer preferences.

  In addition, although demonstrated using the mobile telephone as an example of a portable terminal, the portable terminal in which the portable terminal of this invention is used is not limited to a mobile telephone, A personal digital assistant (PDA), portable type If the terminal is a portable terminal such as a car navigation system or an audio player and requires decorativeness, various portable terminals are applicable.

  Next, FIG. 10 is a schematic diagram showing an example of a configuration of a soap case using the decorative part for daily goods of the present invention.

  The soap case 80 is composed of a main body 83 and a lid 82, and a discharge surface 85 for draining water adhering to the surface of the soap 81 is formed on the mounting surface 84 of the soap 81 of the main body 83. . When the soap 81 is not used, the soap 81 is placed on the mounting surface 84 of the main body 83 and stored by fitting the lid 82 to the main body 83. When the soap 81 is used, the lid 82 is removed from the main body 83. Remove the soap 81 and use it. And by placing the used soap 81 on the mounting surface 84 of the main body 83, the water adhering to the surface of the soap 81 can be cut off by the discharge hole 85, and the soap 81 is prevented from melting. It is something that can be done.

  By forming the main body 83 and the lid 82, which are the soap case 80, with the ceramics for decorative parts of the present invention, the satisfaction of possessing by many consumers and the sense of quality and aesthetic satisfaction through use when visually used And can give mental comfort. Moreover, it can be suitably used not only for the soap case 80 but also for decorative parts for daily necessities such as a brush, razor handle, earpick and scissors. In particular, in the luxury hotel bathrooms and washrooms, the use of ceramics for decorative parts of the present invention for amenity goods marked with various logos, etc. provides a sense of luxury, aesthetic satisfaction, and spirituality. Can give peace.

  Next, FIG. 11 is a perspective view showing an example of a coffee cup set which is a decorative part for daily goods made of ceramics for decorative parts of the present invention.

  A coffee cup set 90 shown in FIG. 11 includes a coffee cup 91, a saucer 92, and a spoon 93. By forming the coffee cup 91, the saucer 92, and the spoon 93 with the ceramics for decorative parts of the present invention, many demands are made. It is possible to give a feeling of luxury, aesthetic satisfaction, and mental comfort to the person through the visual sense when using it and when using it.

  In addition, since the ceramics for decorative parts of the present invention are compatible with other colors, at least one of the coffee cup 91, the saucer 92 or the spoon 93 is formed of the ceramics for decorative parts of the present invention, and the other types have different colors. Can also be used in combination.

  Further, the decorative part for daily goods of the present invention can be suitably used not only for the soap case 80 and the coffee cup set 90 but also for decorative parts for daily goods such as a brush, razor handle, earpick, and scissors. In particular, in the luxury hotel bathrooms and washrooms, the use of ceramics for decorative parts of the present invention for amenity goods marked with various logos, etc. provides a sense of luxury, aesthetic satisfaction, and spirituality. Can give peace.

  Next, FIG. 12 is a perspective view showing an example of a vehicle body to which a vehicle article decorative part made of the ceramic for decorative parts of the present invention is attached.

  The vehicle body 100 shown in FIG. 12 is attached with an emblem 101 that is a decorative part for vehicle articles. By forming the emblem 101 with the ceramic for decorative parts of the present invention, a sense of quality is visually felt to the consumer. , Aesthetic satisfaction and mental comfort can be provided, so that the decorative value of the vehicle body 100 can be increased. In FIG. 12, the emblem 101 attached to the front of the vehicle body 100 is shown, but the vehicle body 100 can also be attached to the vehicle body 100 by attaching an emblem 101 such as a manufacturer name or a vehicle model name formed of ceramics for decorative parts of the present invention. Can increase the decorative value of 100.

  FIG. 13 is a front view showing an example of a corner pole using the decorative part for vehicle articles of the present invention.

  The corner pole 102 shown in FIG. 13 is attached to mark the left front of the vehicle body (in the case of a right-hand drive vehicle) that is difficult to see from the driver's seat when the vehicle is taken in and out of the parking lot. A section 103, a pole section 104, and a lighting section 105 made of an LED or the like are included. By forming the pole portion 104 of the corner pole 102 with the ceramics for decorative parts of the present invention, or by attaching the emblem formed with the ceramics for decorative parts of the present invention instead of the lighting parts 105, the corner pole 102 and the This is preferable because the decorative value of the vehicle body is improved.

  The decorative parts for vehicles made of the ceramics for decorative parts of the present invention are attached not only to the emblem 101 and the corner pole 102 but also to a part of the wheel cap, a part of the hood ornament provided on the hood of the vehicle body, and the inside of the vehicle. Even if it is used as an accessory, an accessory, or a part thereof, the decorative value is improved, which is preferable.

  Next, FIG. 14 is a front view showing an example of a golf club using the decorative component for sports equipment of the present invention.

  A golf club 110 shown in FIG. 14 includes a shaft 111, a grip 112 attached to one end of the shaft 111, and a head 113 attached to the other end of the shaft 110. The head 113 has a face surface 113F, which is a portion for catching a golf ball, and a sole surface 113S, which is a portion in contact with the ground. As shown in FIG. 14, an accessory 114 formed of the ceramic for decorative parts of the present invention is provided. If it is embedded in the face surface 113F, the decorative value is improved, which is preferable.

  In addition, the decorative part for sports goods of the present invention is suitable not only for the face surface 113F but also for the accessory surface 114 made of the ceramic for decorative parts of the present invention in the sole surface 113S and the grip 112.

  FIG. 15 is a bottom view showing an example of spiked shoes using a decorative component for sporting goods made of the ceramic for decorative component of the present invention.

  The spike shoe 120 shown in FIG. 15 is used for, for example, soccer and rugby, and a plurality of studs 122 formed in a protruding shape for fixing a shaft foot when kicking a ball are attached to the shoe sole 121. ing. When the ceramic for decorative parts of the present invention is used as the stud 122, the decorative value is improved, and the wear resistance is superior to the conventionally used aluminum alloy stud. Since the replacement frequency of 122 can be reduced, the cost of replacement can be reduced. Note that the surface of the stud 122 may be covered with a transparent resin in order to prevent the stud 122 from being chipped that may occur during the competition.

  Next, FIG. 16 is a perspective view showing an example of a guitar using musical instrument decorative parts made of the ceramics for decorative parts of the present invention.

  The main configuration of the guitar 130 shown in FIG. 16 includes a main body 131 and a neck 132 extending forward from the main body 131. A nut 133 is disposed at the tip of the neck 132, and a tuning beg 135 capable of adjusting the tension of the string 134 is provided for each string 134 in front of the nut 133. In addition, a clamp mechanism 136 for holding the string 134 so as not to move with respect to the nut 133 is disposed near the nut 133.

  On the other hand, a tremolo device 137 for giving an impressive sound effect by simultaneously increasing or decreasing the tension of the string 134 is attached to the main body 131. The tremolo device 137 includes a base plate 138 attached to the main body 131, a bridge saddle 139 that is held by the base plate 138 and holds the string 134 in a tunable manner, and a tremolo bar 140 that operates the tremolo device. Yes. Since the decorative value of the guitar 130 is improved by forming the base plate 138, the bridge saddle 139, the tremolo bar 140, etc. of the guitar 130 with the ceramics for decorative parts of the present invention, the satisfaction of owning the guitar 130 is satisfied. It can make you feel and attract many spectators.

  Next, FIG. 17 is a schematic view showing an example of an artificial dental crown using a decorative part for accessory made of ceramics for decorative parts of the present invention.

  The schematic diagram of FIG. 17 shows an artificial dental crown 141 attached to an abutment (appartment) 144 fixed to an artificial tooth root (implant) 143 embedded in the jawbone 142 inside the gingiva 145. By forming the artificial tooth crown 141 with the ceramic for decorative parts of the present invention, the teeth emit a golden shine, so that it is possible to give a high euphoria to consumers who prefer tooth decoration.

  In addition, the artificial tooth root 143 embedded in the jawbone 142 is formed in a screw shape, and at least one of chitin, collagen, and derivatives thereof having a high ability to induce the formation of new bone is formed in the screw-shaped portion. A hard bonding layer made of a biodegradable substrate containing seeds may be formed. Further, a soft bonding layer made of the crosslinked biodegradable base material may be formed on the base of the abutment 144 so as to contact the gingiva 145 located on the upper side of the jawbone 142.

  Since the ceramic for decorative parts of the present invention is made of a titanium nitride sintered body, it is easily adapted to a living body. Taking advantage of this advantage, it is used not only for the artificial dental crown 141 but also for the artificial tooth root 143 and the abutment 144. Is also suitable.

  FIG. 18 is a front view showing an example of an earphone unit using a decorative part for accessory made of ceramics for decorative parts of the present invention.

  The earphone unit 150 shown in FIG. 18 is inserted through a speaker 151 that is inserted into the listener's ear shell and generates sound waves, a case 152 that incorporates the speaker 151, and a cord derivation unit 153 that contacts the case 152. And a cord 154 for supplying an electric signal to the speaker 151.

  By forming the case 152 of the earphone unit 150 with the ceramics for decorative parts of the present invention, the decorative value is enhanced, and the accessory is designed to give many consumers a sense of quality, aesthetic satisfaction, and mental comfort. It can be a decorative part.

  Further, FIG. 19 is a perspective view showing an example of eyeglasses using a decorative part for jewelry made of ceramics for decorative parts of the present invention.

  The eyeglasses 160 shown in FIG. 16 includes a pair of lenses 161a and 161b for correcting vision and protecting eyes from ultraviolet rays, a bridge 162 connecting the pair of lenses 161a and 161b, and the lenses 161a and 161b. The armor 163a, 163b coupled to 161b, the temples 164a, 164b coupled to the armor 163a, 163b so as to be able to rotate via a hinge, and the lenses 161a, 161b via nose pad coupling members, respectively. And a nose pad 165 to be attached.

  By forming at least one of the bridge 162, the temples 164a and 164b and the nose pad 165 of the eyeglass 160 with the ceramic for decorative parts of the present invention, the decorative value is increased, and a high-class feeling is visually recognized by many customers. It can be set as a decorative part for jewelry that gives aesthetic satisfaction and mental comfort.

  And the Vickers hardness and fracture toughness of the ceramic for decorative parts of this invention can be measured by the indenter press-in method (IF method) prescribed | regulated to JISR1610-2003 and JISR1607-1995. Further, the rigidity of the ceramic for decorative parts of the present invention can be confirmed by the value of the dynamic elastic modulus measured by the ultrasonic pulse method specified in JIS R 1602-1995.

  Next, an example of the manufacturing method of the ceramic for decorative parts of this invention is demonstrated.

  In order to obtain the ceramic for decorative parts of the present invention, first, a predetermined amount of each powder comprising titanium nitride as a main component, at least one of zirconium oxide and aluminum oxide, boron, and titanium boride is weighed. Grind and mix to make the raw material. More specifically, a titanium nitride powder having an average particle size of 10 μm to 30 μm, an aluminum oxide powder having an average particle size of 0.8 μm to 5 μm, and a zirconium oxide powder having an average particle size of 1 μm to 2 μm. At least one kind, boron powder having an average particle size of 1 μm to 4 μm, and titanium boride having an average particle size of 1 μm to 4 μm are prepared. The boron (B) powder may be either amorphous boron powder or crystalline boron powder, but amorphous boron powder is preferred from the viewpoint of activation of sintering and reactivity.

  For example, at least one of aluminum oxide and zirconium oxide powders is 7 mass% to 18 mass%, boron powder is 2 mass% to 10 mass%, and titanium boride powder is 1 mass% to 6 mass%. % So that the balance is titanium nitride powder, and the mixture may be pulverized and mixed.

Further, in order to obtain a ceramic for decorative parts containing manganese, a manganese powder having an average particle size of 13 μm or more and 23 μm or less or a manganese carbonate powder having an average particle size of 13 μm or more and 23 μm or less represented by MnCO ₃ When using manganese powder, the ratio is 0.2 mass% to 2 mass%, and when using manganese carbonate powder, the ratio is 0.1 mass% to 1 mass%. Hereafter, what is necessary is just to add to a mixing raw material. At this time, silicon, phosphorus, sulfur, iron, and the like are listed as inevitable impurities in the blended raw material, but these may adversely affect the color tone of the decorative surface, so each of them is preferably less than 0.5% by mass. is there.

Further, the titanium nitride powder may be TiN having a stoichiometric composition or TiN _x having a non-stoichiometric composition (0 <x <1). From the viewpoint of high value color tone, the purity of each powder is preferably 99% or more, and in particular, 0.8 ≦ x ≦ when the composition formula of titanium nitride, which is the main component of ceramics for decorative parts, is TiN _x. To achieve 0.96, the titanium nitride powder may be 0.7 ≦ x ≦ 0.9 when the composition formula is TiN _x .

  Next, for example, isopropanol is added to the blended raw material as an organic solvent, and after mixing and grinding for 150 hours or more using a mill, a predetermined amount of paraffin wax is added as a binder, and a desired molding method such as dry pressure molding is performed. It is formed into a desired shape such as a disk, flat plate, or torus by the method, cold isostatic pressing, extrusion molding or the like. In addition, silicon, phosphorus, sulfur, iron, and the like are listed as unavoidable impurities in the blended raw material, and these may adversely affect the color tone of the decorative surface, so each of them is preferably less than 0.5% by mass.

  Further, when dry pressing is selected as the molding method, the molding pressure affects the open porosity and Vickers hardness (Hv) on the decorative surface, and therefore, the molding pressure is preferably 49 MPa or more and 196 MPa or less. . By setting the molding pressure to 49 MPa or more and 196 MPa or less, the life of the mold can be extended, the relative density is 95% or more, the open porosity is 2.5% or less, and the Vickers hardness (Hv) is 10.5. A sintered body of GPa or higher can be obtained.

Then, after degreasing the obtained molded body in a non-oxidizing atmosphere such as a nitrogen atmosphere or an inert gas atmosphere as necessary, it is fired in a nitrogen atmosphere and sintered with a relative density of 95% or more with respect to the theoretical density. Get the body. It is to be noted that the firing in the nitrogen atmosphere is that when the firing is performed in an oxidizing atmosphere, the titanium is oxidized and most of the titanium oxide is represented by the composition formula TiO ₂ . This is because the overall color tone of the ceramics for decorative parts becomes whitish.

  Furthermore, the firing temperature is preferably 1950 ° C. or higher and 2100 ° C. or lower. This is because a sintered body having a relative density of 95% or more and an open porosity of 2.5% or less can be obtained.

  And the surface where the decorative value of the obtained sintered body is required is subjected to lapping using a lapping machine, and then subjected to barrel polishing so that the surface of the sintered body has a golden color tone. The ceramic for decorative parts of the present invention can be obtained. In addition, it is preferable that the pores appearing on such a decorative surface have a maximum diameter of 30 μm or less, and by setting this range, adhesion of germs, foreign matters, contaminants, etc. into the pores is possible. Can be reduced.

  When the shape of the product made of ceramics for decorative parts is complex, close to the block shape or product shape by dry pressure molding method, cold isostatic pressing method, extrusion molding method, injection molding method, etc. After forming into a shape and sintering, grinding may be performed to obtain a product shape, and then lapping and barrel polishing may be performed sequentially, or the product shape may be formed by injection molding from the beginning and sequentially after firing. Lapping and barrel polishing may be performed.

  Here, in order to set the arithmetic average height Ra of the surface to be a decorative surface to 0.03 μm or less, diamond abrasive grains having a small average particle diameter may be supplied to a lapping machine made of tin and lapped. Diamond abrasive grains having a diameter of 1 μm or less may be used. In barrel polishing, a rotating barrel polishing machine may be used, and green carborundum (GC) as a medium may be charged into the rotating barrel polishing machine and performed wet for 24 hours.

  The ceramics for decorative parts of the present invention obtained as described above has high hardness and rigidity, and has a golden color tone that can give a consumer a sense of quality, aesthetic satisfaction and mental comfort for a long time. Therefore, as described above, decorative parts for fishing line guides such as fishing line guide rings, decorative parts for watches such as wristwatch cases and watch band pieces, decorative parts for portable terminals such as various keys and cases operated by pressing, Soap case, coffee cup set, knife, fork, toothbrush and razor handle, earpick, scissors, decorative parts for daily goods such as stamps and business cards, decorative parts for vehicle accessories such as emblems and corner poles of manufacturers and car models, Decorative parts for sports equipment such as golf club accessories and studs for spiked shoes, and musical instrument decorations such as guitar base plates Goods, can be suitably used for jewelry decorative component for a bridge or the like of the case and glasses of artificial crowns and earphone units.

  In addition, brooches, necklaces, earrings, rings, bracelets, anklets, tie pins, tie tacks, medals, buttons, etc., decorative parts for building materials such as tiles or door handles that decorate floors, walls, ceilings, and religious It can also be suitably used as a decorative part for industrial crafts.

  Examples of the present invention are shown below, but the present invention is not limited to the following examples.

First, the contents shown in Table 1 are obtained using powders of titanium nitride (TiN), zirconium oxide (ZrO ₂ ), aluminum oxide (Al ₂ O ₃ ), boron (B), and titanium boride (TiB ₂ ). Were weighed and mixed to obtain a blended raw material.

  Next, isopropanol as an organic solvent is added to each of the above prepared raw materials, pulverized and mixed for 150 hours using a vibration mill, and 3% by mass of a binder such as polyethylene glycol is added to the prepared raw materials and mixed. And then dried into granules. Then, the obtained granule was filled in a mold and pressure-molded at a pressure of 98 MPa to produce a disk-shaped and a columnar molded body, respectively. These compacts were degreased at 600 ° C. in a nitrogen atmosphere and then held at 1970 ° C. for 2 hours in a nitrogen atmosphere to obtain a sintered body.

  And the fracture toughness of the disk-shaped sintered compact was measured using the indenter press-in method (IF method) prescribed | regulated to JISR1607-1995. Moreover, the dynamic elastic modulus of the disk-shaped sintered body was measured using an ultrasonic pulse method defined in JIS R 1602-1995.

In addition, each of titanium nitride, zirconium oxide, aluminum oxide, boron and titanium boride constituting these sintered bodies is identified by an X-ray diffraction method, and each content of zirconium oxide and aluminum oxide is determined by ICP emission spectroscopy. The elemental content was measured by an analytical method. The total content of boron and the content of boron constituting titanium boride was also measured by ICP emission spectroscopic analysis. Then, Zr and Al are calculated in terms of ZrO ₂ and _Al 2 _{O 3} is an oxide, B was content measurements.

  For titanium nitride, no measurement was performed, and the sum of the contents of aluminum oxide, zirconium oxide and boron was set to 100% by mass, and the value subtracted from this value was used as the content of titanium nitride.

  A spectrocolorimeter (CM-3700d manufactured by Konica Minolta) is used according to JIS Z 8722-2000, the CIE standard light source D65 is used as the light source, the viewing angle is set to 10 °, and the measurement range is set to 5 mm × 7 mm. The color tone of the surface of the disk-shaped ceramic for decorative parts was measured.

For the evaluation of wear resistance, the obtained cylindrical sintered body was placed in a predetermined position (in FIG. 4, the ceramic 31 for decorative parts 31) using the wear resistance evaluation apparatus shown in FIG. after fixing with a jig in position), prepared mud semi porcelain earth in water 0.001 m ³ (porcelain earth in clay (pottery stone) blended clay) was 10g poured a mixture of a water tank 34 did. The mass of the weight 35 is set to 500 g, the speed at which the thread 32 slides on the outer peripheral side of the cylindrical sintered body is set to 60 m / min, and the traveling distance of the thread 32 is set to 3000 m, and muddy water adheres. The thread 32 made of nylon (Toray made silver scale Σ3) was slid on the outer peripheral side of the cylindrical sintered body. Then, using a surface shape measuring microscope (Keyence's measuring unit VF-7510 / controller VF-7500), the deepest part of the scratches caused by the abrasion of the cylindrical sintered body by sliding the thread 32 It was measured.

  Furthermore, regarding color tone, a questionnaire survey was conducted on a total of 40 monitors, 5 men and women for each age group in their 20s and 50s, with three items: luxury, aesthetic satisfaction, and mental comfort. Among the three survey results of luxury, aesthetic satisfaction, and mental comfort, the percentage of monitors that answered “obtained” was 90% or more, “excellent”, one of the above three items However, those with 70% or more and less than 90% were evaluated as “good”. The results are shown in Tables 1 and 2. In addition, (circle) described in Table 2 means that each component was confirmed, and x means that each component was not confirmed.

  As can be seen from the results shown in Table 2, for the decorative part ceramics of the present invention, sample No. 1 containing at least one of zirconium oxide and aluminum oxide was not used. No. 1 was inferior in wear resistance. Sample No. containing no boron was used. No. 2 had low fracture toughness, a small value of dynamic elastic modulus, and poor rigidity. Sample No. containing no titanium boride. No. 3 was inferior in wear resistance because of insufficient corrosion resistance.

  On the other hand, sample No. which is a sample of the present invention. Nos. 4 to 42 are mainly composed of titanium nitride, and contain at least one of zirconium oxide and aluminum oxide, boron, and titanium boride, so that the titanium nitride crystal particles on the surface layer of the ceramic for decorative parts are oxidized. It can be seen that at least one of aluminum oxide and zirconium oxide can suppress the volume expansion at the time, and the crystal grains can be prevented from degranulating, so that the wear resistance is improved. In addition, since boron contains good wettability to titanium nitride and titanium boride, it acts as a binder that firmly bonds titanium nitride crystal particles to each other and between titanium nitride crystal particles and titanium boride crystal particles. In addition, it can be seen that the high hardness is maintained by suppressing the decomposition of the titanium boride having a high hardness. It can also be seen that titanium boride has high corrosion resistance and therefore improved wear resistance.

  In particular, sample no. 9 to 11, 22 to 26, and 35 to 39, the content of at least one of zirconium oxide and aluminum oxide is 7% by mass or more and 18% by mass or less. The boron content and the boron content of titanium boride Since the total content is 3% by mass or more and 14% by mass or less, the titanium nitride crystal particles can be sufficiently dissolved in the titanium nitride crystal particles. It can be seen that the performance is improved.

  Moreover, sample Nos. 5-15, 18-28, 31-41. Since the brightness index L * in the CIE1976 L * a * b * color space of the decorative surface is 63 or more and 75 or less, and the chromaticness indices a * and b * are 4 or more and 7 or less, and 13 or more and 23 or less, It can be said that it becomes a golden color having moderate brightness and vividness, and it can continue to provide a sense of luxury, aesthetic satisfaction and mental comfort over a long period of time.

A test was conducted to confirm changes in characteristics due to differences in manganese content.
First, titanium nitride (TiN), zirconium oxide (ZrO ₂ ), aluminum oxide (Al ₂ O ₃ ), boron (B), titanium boride (TiB ₂ ), and manganese carbonate (MnCO ₃ ) are used for the expression. 3 were weighed so as to have the content shown in FIG. Next, sample No. 1 was manufactured by the same manufacturing method as in Example 1. 43 to 46 disk-shaped ceramics for decorative parts of the present invention were obtained.

In addition, each of titanium nitride, zirconium oxide, boron, titanium boride, and manganese constituting these sintered bodies is identified by X-ray diffraction, and each content of these components is determined by ICP emission spectroscopy. The content of was measured. Ti was converted to TiN which is a nitride, Zr was calculated by converting to ZrO ₂ which was an oxide, and B and Mn were measured values.

  A spectrocolorimeter (CM-3700d manufactured by Konica Minolta) is used according to JIS Z 8722-2000, the CIE standard light source D65 is used as the light source, the viewing angle is set to 10 °, and the measurement range is set to 5 mm × 7 mm. Then, the color tone was measured at a total of five locations including one central portion and four peripheral portions on the surface of the disk-shaped ceramic for decorative parts, and an average value and a standard deviation were calculated. The results are shown in Table 3. In addition, (circle) described in Table 3 means that each component was confirmed, and x means that each component was not confirmed.

As shown in Table 3, sample no. Compared to sample No. 43, manganese containing sample No. Nos. 44 to 46 were found to be good because the granules obtained by spray drying were hardly oxidized and thus there was little variation in color tone on the surface.

  Further, by using the ceramics for decorative parts of the present invention, a fishing line guide ring for fishing line guides, a watch case or watch band piece for decorative parts for watches, and a mobile phone which is a decorative part for portable terminals. Various operation keys and cases, soap cases and coffee cup sets that are decorative parts for daily necessities, emblems and corner poles that are decorative parts for vehicle accessories, studs for golf club accessories that are parts for sports equipment, studs for spiked shoes, and musical instruments The guitar base plate, which is a decorative part, the artificial crown and the earphone unit case, which is a decorative part for jewelry, and a bridge for eyeglasses, are produced with excellent wear resistance and high hardness and rigidity. Because the surface is not easily scratched and the golden color can be maintained for a long time, Grade feeling, it was possible to obtain attractive products that continue to give a long period of time the aesthetic satisfaction and mind soothing effect.

1: Guide line for fishing line 6: Guide for fishing line
10: Composite decorative parts
20: Fishing rod
40A, 40B: Watch case
50: Watch band
51: Outer piece
52: Nakakoma
55: Pin
60: Mobile phone
80: soap case
90: coffee cup
101: Emblem
102: Corner pole
110: Golf Club
120: Shoes
130: Guitar
141: Artificial dental crown
150: Earphone unit
160: glasses

Claims (6)

A ceramic for decorative parts comprising titanium nitride as a main component and containing at least one of zirconium oxide and aluminum oxide, boron, and titanium boride. The content of at least one of the zirconium oxide and the aluminum oxide is 7% by mass or more and 18% by mass or less, and the total of the content of boron and the content of boron constituting the titanium boride is 3% by mass. The ceramic for decorative parts according to claim 1, wherein the ceramic content is in a range of from% to 14% by mass. Furthermore, manganese is contained in 0.1 mass% or more and 1 mass% or less of range, The ceramic for decorative parts of Claim 1 or Claim 2 characterized by the above-mentioned. The lightness index L * in the CIE 1976 L * a * b * color space of the decorative surface is 63 or more and 75 or less, and the chromaticness indices a * and b * are 4 or more and 7 or less and 13 or more and 23 or less, respectively. The ceramic for decorative parts according to any one of claims 1 to 3. A decorative part for fishing line guide, comprising the ceramic for decorative part according to any one of claims 1 to 4. A decorative part made of the ceramic for decorative parts according to any one of claims 1 to 4 and a decorative part having a decorative surface of a color different from that of the ceramic for decorative parts are arranged side by side. Composite decorative parts.

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