JP2008081751A - 1a group or 2a group metal-titanium alloy - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an alloy which can stably be used under wider environments, and to provide its use and its producction process. <P>SOLUTION: The method for producing the 1A group or the 2A group metal-Ti alloy, in which Ti or Ti alloy and the 1A group or the 2A group metal are contained and the concentration of this metal in the range of depth of at least 10 μm from this surface is at least 0.2 atom% and the total content of this metal in this alloy is 0.001-0.5 atom%, by bringing Ti or Ti alloy (except the 1A group or the 2A group metal-Ti alloy) 5 into contact with the molten material 7 or the gaseous material or the 1A group or the 2A group metal at the melting point or higher of this metal and in the stable temperature range of β-Ti. This alloy can be used e.g. for the method for producing an implant in the oral cavity or as the material for using under existence of fluoride. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an alloy, a method for producing the alloy, a surface treatment method for titanium or a titanium alloy, and use of the alloy. More specifically, the present invention relates to medical materials, analytical instruments, manufacturing apparatuses, chemical products, alloys useful for pharmaceuticals, etc., methods for producing the alloys, titanium or titanium alloy surface treatment methods, and uses of the alloys About.

  Alloys are used in a variety of applications. For example, titanium and alloys of titanium and aluminum, vanadium, molybdenum, tin, iron, chromium, etc. have high strength and are excellent in light weight, so that they are currently used in vehicles, ships, aircraft, golf clubs, living bodies. It is used for various uses such as materials (for example, see Patent Document 1).

However, the use conditions of the titanium and the alloy may be limited depending on the environment.
JP-A-2005-240144

  An object of the present invention is to provide an alloy that can be used stably in a wider range of environments. Another object of the present invention is to provide a method for producing the alloy, which can obtain the alloy with high efficiency. Furthermore, this invention makes it the other subject to provide the surface treatment method of titanium or a titanium alloy which can provide corrosion resistance with respect to a fluoride etc. to titanium or a titanium alloy. In addition, the present invention provides the use of the alloy for the production of an oral implant, which can produce an oral implant that can be used stably even under conditions where, for example, fluoride exists. This is another issue. The present invention provides, for example, a member such as an apparatus used under conditions in which a fluoride or the like is present, a material that can be used for the production thereof, and the alloy as a material to be used in the presence of fluoride. Another issue is to provide the use of Other problems of the present invention will be apparent from other descriptions in the present specification.

That is, the gist of the present invention is as follows.
[1] Titanium or a titanium alloy (excluding a group 1A or 2A metal-titanium alloy), a melt of a group 1A or 2A metal or a gas of the metal, having a melting point of the metal or higher and β A method for producing a Group 1A or Group 2A metal-titanium alloy, characterized in that it is maintained in contact with a temperature range within the stable temperature range of titanium;
[2] The method for producing a group 1A or group 2A metal-titanium alloy according to [1], wherein the group 1A or group 2A metal is magnesium,
[3] An alloy comprising titanium or a titanium alloy (excluding a group 1A or 2A metal-titanium alloy) and a group 1A or 2A metal, and a depth of at least 10 μm from the surface of the alloy Group 1A or Group 2A metal-titanium having a concentration of the metal in the range of at least 0.2 atomic% and a total content of the metal in the alloy of 0.001 to 0.5 atomic% alloy,
[4] The group 1A or group 2A metal-titanium alloy according to the above [3], wherein the group 1A or group 2A metal is magnesium,
[5] Group 1A or Group 2A metal-titanium alloy obtained by the production method according to [1] or [2]
[6] Titanium or a titanium alloy (excluding group 1A or group 2A metal-titanium alloy), a melt of group 1A or group 2A metal or a gas of the metal, having a melting point of the metal or higher and β -A surface treatment method of titanium or a titanium alloy, characterized in that the titanium or titanium alloy is contacted and maintained in a temperature range within the stable temperature range of titanium,
[7] The surface treatment method according to the above [6], wherein the group 1A or group 2A metal is magnesium,
[8] Use of the group 1A or group 2A metal-titanium alloy according to any one of the above [3] to [5] for the production of an oral implant, and [9] for use in the presence of fluoride Use of the group 1A or group 2A metal-titanium alloy according to any one of the above [3] to [5] as a material of
About.

  According to the 1A group or 2A group metal-titanium alloy of the present invention, there is an excellent effect that it can be used stably in a wider environment. Moreover, according to the manufacturing method of 1A group or 2A group metal-titanium alloy of this invention, there exists the outstanding effect that the said 1A group or 2A group metal-titanium alloy can be obtained with high efficiency. Furthermore, according to the surface treatment method of titanium or titanium alloy of the present invention, titanium or titanium alloy (however, excluding Group 1A or Group 2A metal-titanium alloy) can be given corrosion resistance to fluoride or the like. There is an excellent effect of being able to. In addition, according to the use of the alloy for the production of an oral implant of the present invention, it is possible to produce an oral implant that can be used stably even under conditions where fluorides are present. There is an effect. According to the use of the alloy as a material for use in the presence of fluoride of the present invention, for example, a member such as a device used under conditions where fluoride or the like is present, a material that can be used for the production thereof, etc. There is an excellent effect that it can be obtained.

  In one aspect, the present invention is an alloy containing titanium or a titanium alloy (excluding a group 1A or 2A metal-titanium alloy) and a group 1A or 2A metal, and The concentration of the metal in the range from the surface to a depth of at least 10 μm is at least 0.2 atomic%, and the total content of the metal in the alloy is 0.001 to 0.5 atomic%. Group 2A or Group 2A metal-titanium alloy.

  The Group 1A or Group 2A metal-titanium alloy of the present invention is an alloy containing titanium or a titanium alloy (excluding a group 1A or 2A metal-titanium alloy) and a group 1A or 2A metal. It exhibits an excellent effect of exhibiting high corrosion resistance against fluoride and the like. In addition, the Group 1A or Group 2A metal-titanium alloy of the present invention exhibits high hardness because the concentration of the metal in the range from the surface of the alloy to a depth of at least 10 μm is at least 0.2 atomic%. Exhibits an excellent effect. Therefore, the 1A group or 2A group metal-titanium alloy of the present invention exhibits an excellent effect that it can be used stably in a wider environment.

Here, the corrosion resistance is, for example, an aqueous solution (pH 4.0) containing hydrofluoric acid, sodium fluoride and the balance water so as to have a fluorine ion concentration of 0.024 kmol / m ³ and degassed with nitrogen gas. ) As a test solution, a silver / silver chloride electrode as a reference electrode, a platinum electrode as a counter electrode, evaluation temperature: 25 ° C., potential sweep rate: 1.6 mVs ⁻¹ , potential of −2.0 to 1.0 V It can be evaluated based on the active current density measured in the range.

  In the present specification, the “group 1A or group 2A metal-titanium alloy” includes titanium or a titanium alloy (excluding group 1A or group 2A metal-titanium alloy) and a group 1A or group 2A metal. An alloy. In such a group 1A or group 2A metal-titanium alloy, the titanium and the group 1A or group 2A metal exist in a solid solution state. The group 1A or group 2A metal-titanium alloy includes an alloy containing titanium, a group 1A or group 2A metal and an inevitable impurity, a titanium alloy (except for a group 1A or group 2A metal-titanium alloy), and Also included are alloys obtained from Group 1A or Group 2A metals.

  Examples of the Group 1A metal include lithium, sodium, potassium, rubidium, cesium, and francium. Examples of the group 2A metal include beryllium, magnesium, calcium, strontium, barium and radium. Among the group 1A or group 2A metals, the viewpoint of having a lower melting point than titanium, the viewpoint of easy handling, and the obtained group 1A or group 2A metal-titanium alloy exhibit, for example, sufficient corrosion resistance to fluoride. From the viewpoint of caking, magnesium is preferable. In addition, when applying 1A group or 2A group metal-titanium alloy of this invention with respect to a biological body, magnesium is desirable from a viewpoint of exhibiting high biocompatibility in the said 1A group or 2A group metal.

  The titanium may be either α-titanium having a close-packed cubic structure (α phase) or β-titanium having a body-centered cubic structure (β phase). Examples of the titanium alloy include conventionally used titanium alloys.

  In the Group 1A or Group 2A metal-titanium alloy of the present invention, the concentration of the metal in the range from the surface of the alloy to a depth of at least 10 μm is at least 0.2 atomic%. In the Group 1A or Group 2A metal-titanium alloy of the present invention, the concentration of the metal in the range from the surface of the alloy to a depth of preferably 100 μm or more, more preferably to a depth of 500 μm or more is, for example, From the viewpoint of sufficiently exhibiting corrosion resistance to an aqueous fluoride solution and the like, and from the viewpoint of obtaining sufficient hardness, it is preferably 0.3 atomic% or more, more preferably 0.4 atomic% or more. What is necessary is just the density | concentration used as less than the solid solution limit density | concentration of a group metal.

  On the surface of the Group 1A or Group 2A metal-titanium alloy of the present invention, the Group 1A or Group 2A metal is present substantially uniformly. Therefore, the 1A group or 2A group metal-titanium alloy of the present invention can stably exhibit, for example, corrosion resistance against fluoride and the like.

  The total content of the metal in the Group 1A or Group 2A metal-titanium alloy of the present invention is, for example, 0.2 atomic% from the viewpoint of sufficiently exhibiting corrosion resistance against an aqueous fluoride solution and the like and obtaining sufficient hardness. As mentioned above, Preferably it is 0.3 atomic% or more, More preferably, it is 0.4 atomic% or more, and what is necessary is just content which becomes less than the solid solution limit amount of the 1A group or 2A group metal used.

  The group 1A or group 2A metal-titanium alloy of the present invention is preferably a magnesium-titanium alloy from the viewpoint of sufficiently exhibiting corrosion resistance against, for example, an aqueous fluoride solution.

  In addition, if the 1A group or 2A group metal-titanium alloy of the present invention does not interfere with the object of the present invention, titanium, titanium alloy (excluding 1A group or 2A group metal-titanium alloy), 1A group In addition to the metal and the group 2A metal, other substances such as other metals and inevitable impurities may be contained.

  The Group 1A or Group 2A metal-titanium alloy of the present invention has high corrosion resistance to, for example, fluoride and has high strength, and thus, for example, medical materials such as dental implants and bone implants; It can be applied to a wide variety of fields, such as an analysis apparatus for various analytical substances such as a corrosive substance; a production apparatus for various substances such as a highly reactive or corrosive substance; a chemical product;

  The Group 1A or Group 2A metal-titanium alloy of the present invention includes, for example, titanium or a titanium alloy (excluding Group 1A or Group 2A metal-titanium alloy), a melt of Group 1A or Group 2A metal, or It can be obtained by maintaining the gas in contact with the metal at a temperature range above the melting point of the metal and within the stable temperature range of β-titanium.

  Accordingly, in another aspect, the present invention provides titanium or a titanium alloy (except for a group 1A or 2A metal-titanium alloy), a melt of a group 1A or 2A metal or a gas of the metal, The present invention relates to a method for producing a Group 1A or Group 2A metal-titanium alloy, characterized by being maintained in contact with a temperature in a temperature range equal to or higher than the melting point of the metal and within a stable temperature range of β-titanium.

  In the production method of the present invention, titanium or a titanium alloy (except for a group 1A or group 2A metal-titanium alloy) is brought into contact with a molten group 1A or group 2A metal or a gas of the metal. According to this manufacturing method, for example, an excellent effect that an alloy exhibiting high corrosion resistance can be obtained with respect to fluoride or the like.

  In the production method of the present invention, the contact is performed in a temperature range not lower than the melting point of the metal and in the stable temperature range of β-titanium having a body-centered cubic structure. For example, in the conventional melting method, titanium or a titanium alloy (however, a group 1A or 2A metal-excluding a titanium alloy) and an alloy containing a group 1A or 2A metal (the group 1A or 2A metal- Although it is difficult to obtain a titanium alloy), an excellent effect that the alloy can be obtained efficiently is exhibited. In addition, in the manufacturing method of this invention, when performing the said contact on airtight conditions, it is advantageous at the point which can obtain the said alloy more efficiently.

  The group 1A or group 2A metal used in the production method of the present invention is the same as described above, and has a lower melting point than titanium or a titanium alloy (excluding the group 1A or group 2A metal-titanium alloy). From the viewpoint of facilitating the process, and from the viewpoint of allowing the obtained Group 1A or Group 2A metal-titanium alloy to exhibit excellent corrosion resistance to an aqueous fluoride solution, for example, magnesium is preferable. In addition, when applying 1A group or 2A group metal-titanium alloy obtained by the manufacturing method of this invention with respect to a biological body, it is magnesium from a viewpoint of exhibiting high biocompatibility in said 1A group or 2A group metal. Is desirable.

  The titanium or titanium alloy (except for the group 1A or group 2A metal-titanium alloy) used in the production method of the present invention is the same as described above.

  The Group 1A or Group 2A metal melt can be obtained by maintaining the Group 1A or Group 2A metal above the melting point of the Group 1A or Group 2A metal.

  The Group 1A or Group 2A metal gas can be efficiently generated by maintaining the Group 1A or Group 2A metal at or above the melting point of the metal in a sealed container.

  The contact of the titanium or titanium alloy (except for the group 1A or 2A metal-titanium alloy) with the melt of the group 1A or 2A metal immerses the titanium or the titanium alloy in the melt. Can be performed. Hereinafter, this method is also referred to as “immersion method” in the present specification.

  Further, the contact between the titanium or titanium alloy (excluding the group 1A or 2A metal-titanium alloy) and the gas of the group 1A or 2A metal is caused by contacting the gas of the group 1A or 2A with the titanium Alternatively, it can be performed by exposing a titanium alloy (except for Group 1A or Group 2A metal-titanium alloys). Hereinafter, this method is also referred to as “exposure method” in the present specification.

  In the production method of the present invention, for example, an exposure method is desirable from the viewpoint of further improving the corrosion resistance against fluoride.

  The sealing condition can be set, for example, by welding a container having heat resistance against the temperature at the time of contact, for example, a stainless steel container.

  The temperature at the time of contact of the titanium or titanium alloy (excluding the group 1A or 2A metal-titanium alloy) with the melt of the group 1A or 2A metal or the gas of the metal is the group 1A or 2A The melting point of the metal and the temperature range within the stable temperature range of β-titanium. For example, in the case of magnesium which is a group 2A metal, it is preferably 650 ° C. or more, more preferably, the diffusion rate of magnesium in titanium or a titanium alloy (except for a group 1A or group 2A metal-titanium alloy). From the viewpoint of improving the temperature, 800 ° C. or higher, more preferably from the viewpoint of the stable temperature of β-titanium, preferably 890 ° C. or higher, more preferably 950 ° C. or higher, and from the viewpoint of the melting point of titanium, 1660 It is desirable that the temperature be 1100 ° C. or lower from the viewpoint of the boiling point of magnesium.

  The contact time of the titanium or titanium alloy (excluding the group 1A or 2A metal-titanium alloy) and the melt of the group 1A or 2A metal or the gas of the metal is titanium or titanium alloy (however, It is sufficient that the metal is sufficiently diffused and dissolved in a group 1A or 2A metal-titanium alloy), and can be set as appropriate depending on the type of the 1A group or 2A group metal used. For example, when using magnesium which is a group 2A metal, the maintenance time is preferably from the viewpoint of sufficiently diffusing magnesium in titanium or a titanium alloy (excluding group 1A or group 2A metal-titanium alloy). It is desirable that it is at least 48 hours, more preferably 168 hours or longer. For example, it exhibits excellent corrosion resistance and excellent hardness with respect to, for example, an aqueous fluoride solution in about 430 hours. A metal-titanium alloy can be obtained. Specifically, when contact is made by immersion using magnesium, which is a group 2A metal, magnesium is sufficiently diffused into titanium or a titanium alloy (excluding group 1A or group 2A metal-titanium alloy). From the viewpoint of making the obtained alloy, for example, from the viewpoint of sufficiently exhibiting corrosion resistance to fluorides and the like, the maintenance time is preferably 48 hours or more, more preferably 168 hours or more, and 430 For example, a magnesium-titanium alloy that exhibits excellent corrosion resistance and excellent hardness with respect to, for example, an aqueous fluoride solution can be obtained in about time. In addition, when contact is made by an exposure method using magnesium which is a group 2A metal, a viewpoint of sufficiently diffusing magnesium in titanium or a titanium alloy (excluding group 1A or group 2A metal-titanium alloy), For example, from the viewpoint of sufficiently exhibiting corrosion resistance to fluorides and the like in the obtained alloy, the maintenance time is preferably at least 48 hours, and preferably 168 hours or more. A magnesium-titanium alloy exhibiting excellent corrosion resistance and excellent hardness with respect to an aqueous solution of a chemical compound or the like can be obtained.

  In the production method of the present invention, titanium, titanium alloy (excluding 1A group or 2A group metal-titanium alloy), 1A group metal, and 2A, as long as the object of the present invention is not hindered at the time of contact. In addition to the group metals, other substances such as other metals and inevitable impurities may be present.

  According to another aspect of the present invention, titanium or a titanium alloy (excluding a group 1A or 2A metal-titanium alloy), a melt of a group 1A or 2A metal or a gas of the metal, The present invention relates to a surface treatment method for titanium or a titanium alloy, characterized in that the surface treatment is performed in a temperature range not lower than the melting point and within a stable temperature range of β-titanium. In addition, in the surface treatment method of this invention, when performing the said contact on airtight conditions, it is advantageous at the point which can be implemented more efficiently.

  The surface treatment method of the present invention can be carried out by the same method as the manufacturing method.

  According to the surface treatment method of the present invention, titanium or titanium alloy (excluding 1A group or 2A group metal-titanium alloy) exhibits an excellent effect of being able to impart corrosion resistance to, for example, fluoride. To do.

  In the surface treatment method of the present invention, the contact time between titanium or a titanium alloy (excluding the group 1A or 2A metal-titanium alloy) and the melt of the group 1A or 2A metal or the gas of the metal is immersed. When performed by the method, it is preferably at least 430 hours, and when performed by the exposure method, it is desirably at least 48 hours.

  In yet another aspect, the present invention relates to the use of said Group 1A or Group 2A metal-titanium alloy for the manufacture of an oral implant.

  According to the use of the Group 1A or Group 2A metal-titanium alloy of the present invention, the group 1A or Group 2A metal-titanium alloy of the present invention is used. Oral implants suitable for use in the oral cavity can be produced.

  In the use of the Group 1A or Group 2A metal-titanium alloy of the present invention, the Group 1A or Group 2A metal-titanium alloy is used as a material for an oral implant.

  In another aspect, the present invention relates to the use of the Group 1A or Group 2A metal-titanium alloy as a material for use in the presence of fluoride. According to the use of the alloy as a material for use in the presence of fluoride of the present invention, for example, a member such as a device used under conditions where fluoride or the like is present, a material that can be used for the production thereof, etc. The excellent effect that it can be obtained is exhibited.

  Hereinafter, although the present invention is explained in detail based on an example etc., the present invention is not limited to such an example.

(Example 1)
Magnesium was used as the Group 2A metal.

  As shown in FIG. 1, a carbon crucible (crucible 2) was placed in a stainless steel container (container body 1). As shown in FIG. 1, a JIS type 2 pure titanium plate (titanium 5) is suspended in the air with a nichrome wire in the carbon crucible (crucible 2), and pure magnesium is charged (immersion method). ). On the other hand, as shown in FIG. 1, a JIS type 2 pure titanium plate (titanium 6) was placed on the upper part of the carbon crucible (crucible 2) in the stainless steel container (exposure method). Thereafter, the stainless steel lid (lid 3) and the stainless steel container (container body 1) were welded together at the welded portion 4 to seal the stainless steel container.

  The sealed stainless steel container was placed in an electric furnace. Subsequently, the inside of the electric furnace was maintained at a temperature equal to or higher than the melting point of magnesium and 950 ° C., which is a stable temperature range of β-titanium, for a treatment time of 48 hours, 168 hours or 430 hours. In the immersion method, a titanium plate was immersed in molten magnesium in a sealed container, and the magnesium was diffused and penetrated into the titanium plate (titanium 5). On the other hand, in the exposure method, magnesium gas phase was exposed to a titanium plate in a sealed container, and magnesium was diffused and penetrated into the titanium plate (titanium 6). Then, the said electric furnace was furnace-cooled and the 2A group metal-titanium alloy was obtained.

(Comparative Example 1)
When magnesium is used as the 2A metal and an attempt is made to produce an alloy of titanium and magnesium by a conventional melting method, the melting point of titanium is higher than the melting point of magnesium and is greatly different. Magnesium reacts with oxygen in the atmosphere and ignites. Therefore, it is difficult to produce a Group 1A or Group 2A metal-titanium alloy by a conventional melting method.

(Test Example 1)
Evaluation of Corrosion Resistance of Group 2A Metal-Titanium Alloy In Example 1, the corrosion resistance of the Group 2A metal-titanium alloy obtained by the dipping method or the exposure method was evaluated with respect to an aqueous fluoride solution by a dynamic potential polarization test.

46 mass% hydrofluoric acid 0.25 ml, sodium fluoride 1.00 g, and distilled water 999.75 ml so as to obtain a fluorine ion concentration of 0.024 kmol / m ³ corresponding to the fluorine concentration in a general fluorine-added dentifrice. Were mixed, and the resulting mixture was adjusted to pH 4.0 to obtain an aqueous fluoride solution.

  Using the apparatus shown in FIG. 2, each group 2A metal-titanium alloy obtained in Example 1 was used as a sample 9, a platinum electrode as a counter electrode 8, a silver / silver chloride electrode as a reference electrode 10, and the fluoride aqueous solution. Using this as the test solution 11, a potentiodynamic polarization test was performed. As a control, a potentiodynamic polarization test was similarly performed on titanium in Example 1 where the treatment time was 0 hour. The results are shown in panel (A) and panel (B) of FIG.

  As a result, as shown in the panel (A), in the case of the dipping method, it can be seen that the maximum current density is reduced and the corrosion resistance is improved as the treatment time is increased. In addition, as shown in the panel (B), it can be seen that, even in the case of the exposure method, the maximum current density is reduced and the corrosion resistance is improved as the treatment time is increased. In particular, the exposure method suggests that an alloy having higher corrosion resistance can be obtained compared to the immersion method.

(Test Example 2)
Each 2A group metal-titanium alloy obtained in Example 1 was cut at the center of the alloy and in a direction perpendicular to the surface, and the cut surface was polished to a buff finish with 0.2 μm alumina particles. I did it. With respect to the polished cut surface, an energy dispersive element analyzer (manufactured by JEOL Ltd., trade name: JED-2200) attached to a scanning electron microscope (JEOL Ltd., trade name: JSM-6060LV) is attached. The concentration distribution of magnesium in the depth direction from the surface was measured. Each measurement location was measured 8 times, statistical processing was performed on 6 points excluding the maximum value and the minimum value, and an average value and an error bar (1σ) were calculated. Thereby, the magnesium concentration in the thickness direction at a predetermined depth from the surface was measured. The results are shown in panel (A) and panel (B) of FIG.

  As a result, as shown in the panel (A), it can be seen that magnesium can be diffused into the titanium plate according to the dipping method. Further, as shown in the panel (B), it can be seen that magnesium can be diffused into the titanium plate also by the exposure method. In particular, the exposure method suggests that magnesium can be efficiently diffused from the surface to a deeper position at a higher concentration than the immersion method.

(Test Example 3)
Each 2A group metal-titanium alloy obtained in Example 1 was cut in the center of the alloy and in a direction perpendicular to the surface, and embedded in an epoxy resin so that only the cut surface was exposed. The cut surface is polished to a buff finish with 0.2 μm alumina particles, and using a micro Vickers hardness tester (manufactured by Matsuzawa Co., Ltd., trade name: MXT-α) under the condition of 0.490 N in the thickness direction The distribution of Vickers hardness was measured. Each measurement location was measured 8 times, statistical processing was performed on 6 points excluding the maximum value and the minimum value, and an average value and an error bar (1σ) were calculated. The results are shown in panel (A) and panel (B) of FIG.

  As a result, as shown in panels (A) and (B), it can be seen that according to the exposure method, a group 2A metal-titanium alloy having an average higher hardness distribution than the immersion method can be obtained. .

(Test Example 4)
In Example 1, the dispersed state of magnesium atoms in the 2A metal-titanium alloy produced by the exposure method (treatment time: 430 hours) was applied to a scanning electron microscope (manufactured by JEOL Ltd., trade name: JSM-6060LV). Using the attached energy dispersive elemental analyzer (manufactured by JEOL Ltd., trade name: JED-2200), measurement was performed by the ZAF method under the condition of 15 kV. The results are shown in FIG.

  As a result, as shown in FIG. 6, it can be seen that magnesium atoms are substantially uniformly dispersed on the surface of the 2A metal-titanium alloy.

  According to the present invention, it is possible to provide a material that can be used stably in a wider range of environments.

FIG. 1 is a schematic explanatory view of an apparatus used for producing a 2A metal-titanium alloy. FIG. 2 is a schematic explanatory diagram of an apparatus used for the electrochemical potentiodynamic polarization test. FIG. 3 is a diagram showing the results of a potentiodynamic polarization test of a 2A metal-titanium alloy. Panel (A) shows the results for the immersion method, and panel (B) shows the results for the exposure method. In panel (A), the solid line indicates 0 hour, the short dashed line indicates 168 hours, and the long dashed line indicates 430 hours. In panel (B), the solid line indicates 0 hour, the long dashed line indicates 48 hours, and the short dashed line indicates 168 hours, two-dot long dashed line indicates 430 hours. FIG. 4 is a diagram showing the result of the magnesium concentration distribution in the thickness direction of the 2A metal-titanium alloy. Panel (A) shows the results for the immersion method, and panel (B) shows the results for the exposure method. In the figure, the square (dashed line) indicates the result when the processing time is 48 hours, the triangle (dotted line) indicates the result when the processing time is 168 hours, and the circle (dotted line) indicates the result when the processing time is 430 hours. Results are shown. FIG. 5 is a diagram showing the results of Vickers hardness distribution in the thickness direction of the 2A metal-titanium alloy. Panel (A) shows the results for the immersion method, and panel (B) shows the results for the exposure method. In the figure, the small circle (solid line) indicates the result when the processing time is 0 hour, the square (dashed line) indicates the result when the processing time is 48 hours, and the triangle (dotted line) indicates the result when the processing time is 168 hours. As a result, Daimaru (dotted line) indicates the result when the processing time is 430 hours. FIG. 6 is a diagram showing the distribution state of 2A metal on the surface of the 2A metal-titanium alloy obtained by the exposure method. In the figure, the bottom scale bar indicates 10 μm.

Explanation of symbols

1 Container body 2 Crucible 3 Lid 4 Welded part 5 Titanium (dipping method)
6 Titanium (exposure method)
7 Magnesium 8 Counter electrode 9 Sample 10 Reference electrode 11 Test solution

Claims (9)

  Titanium or a titanium alloy (excluding a group 1A or 2A metal-titanium alloy) and a melt of the group 1A or group 2A metal or a gas of the metal, having a melting point of the metal or higher and a β-titanium A method for producing a Group 1A or Group 2A metal-titanium alloy, which is maintained in contact within a temperature range within a stable temperature range.   The method for producing a Group 1A or Group 2A metal-titanium alloy according to claim 1, wherein the Group 1A or Group 2A metal is magnesium.   Titanium or titanium alloy (excluding group 1A or group 2A metal-titanium alloy) and group 1A or group 2A metal, and in the range from the surface of the alloy to a depth of at least 10 μm Group 1A or Group 2A metal-titanium alloy, wherein the concentration of the metal is at least 0.2 atomic%, and the total content of the metal in the alloy is 0.001 to 0.5 atomic%.   The group 1A or group 2A metal-titanium alloy according to claim 3, wherein the group 1A or group 2A metal is magnesium.   A group 1A or group 2A metal-titanium alloy obtained by the production method according to claim 1 or 2.   Titanium or a titanium alloy (excluding a Group 1A or Group 2A metal-titanium alloy) and a melt of the Group 1A or 2A metal or a gas of the metal at a temperature equal to or higher than the melting point of the metal and of β-titanium A surface treatment method for titanium or a titanium alloy, wherein the surface treatment method is performed by contacting in a temperature range within a stable temperature range.   The surface treatment method of Claim 6 whose 1A group or 2A group metal is magnesium.   Use of a group 1A or group 2A metal-titanium alloy according to any one of claims 3 to 5 for the production of an oral implant.   Use of a Group 1A or Group 2A metal-titanium alloy according to any one of claims 3 to 5, as a material for use in the presence of fluoride.