WO2008053559A1 - Alliages pd-in dorés - Google Patents

Alliages pd-in dorés Download PDF

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Publication number
WO2008053559A1
WO2008053559A1 PCT/JP2006/321985 JP2006321985W WO2008053559A1 WO 2008053559 A1 WO2008053559 A1 WO 2008053559A1 JP 2006321985 W JP2006321985 W JP 2006321985W WO 2008053559 A1 WO2008053559 A1 WO 2008053559A1
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WO
WIPO (PCT)
Prior art keywords
gold
alloy
indium
palladium
weight
Prior art date
Application number
PCT/JP2006/321985
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English (en)
Japanese (ja)
Inventor
Noriyoshi Ishi
Original Assignee
Lapis
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lapis filed Critical Lapis
Priority to PCT/JP2006/321985 priority Critical patent/WO2008053559A1/fr
Publication of WO2008053559A1 publication Critical patent/WO2008053559A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C5/00—Alloys based on noble metals
    • C22C5/04—Alloys based on a platinum group metal
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C28/00—Alloys based on a metal not provided for in groups C22C5/00 - C22C27/00
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C5/00—Alloys based on noble metals
    • C22C5/06—Alloys based on silver

Definitions

  • Cu copper
  • Cs cesium
  • Copper has a high red reflectivity and low green and blue reflectivity, so even gold looks reddish.
  • silver (Ag) appears white because it exhibits a reflectivity of 90% or more over the entire visible light.
  • palladium (Pd) is a silver-white metal and has a face-centered cubic structure that is stable at room temperature.
  • Indium (In) is a silvery gray metal with a tetragonal crystal structure that is stable at room temperature. That is, both palladium and indium are silver and white metals.
  • the present invention is an elegant gold-colored gold alloy mainly composed of palladium (Pd) and indium (In), and is a decorative member (brooch, medal, button, tie pin, earring, pin Pd-In gold alloys that can be used as furniture, pendant heads, clock members (eg dial scales), furniture items such as western tableware, arts and crafts, or dental metal members It is.
  • gold-colored material used for decoration for example, various metals such as pure gold, a gold alloy, brass, or a metal surface plated with gold has been used.
  • pure gold or gold alloy is expensive, and gold plating may be peeled off.
  • Copper / zinc alloys and copper / aluminum alloys have low defects in strength and corrosion resistance!
  • titanium nitride films and sintered alloys have characteristics such as high hardness and excellent corrosion resistance, but they require special equipment and technology and are suitable for the production of individual gold alloys. Not done.
  • Patent Document 1 proposes a gold-colored sintered alloy having a golden color tone that improves the sinterability of a gold-colored sintered alloy in which titanium nitride or the like is bonded with a metal such as Ni or Co. Yes.
  • special equipment is required to produce a sintered alloy based on titanium nitride, which is suitable for the production of individual gold alloys.
  • Patent Document 1 JP-A-5-311311
  • the gold alloy according to the present invention does not contain gold (Au) and copper (Cu) exhibiting a gold color! However, it is a gold alloy exhibiting an excellent gold color. Therefore, it can be produced at a lower cost than conventional so-called gold alloys including pure gold and pure gold.
  • the price of each precious metal as of October 2006 is about 4400 yen for platinum (Au) is about 2300 yen Zg, palladium (Pd) is about 1300 yen Zg, and indium (In) is about 1 20 yen Zg and silver (Ag) are about 45 yen Zg. Therefore, the price of palladium is about half of the price of gold, and about 5% of indium.
  • the material price of a gold alloy with 50% palladium weight and 50% indium weight is 18K gold. It is converted to about 40% of the alloy.
  • the gold alloy according to the present invention is less likely to be scratched on the surface having higher hardness than the conventional gold alloy.
  • Vickers hardness of each precious metal is platinum 41, gold 22, silver 24
  • the Pd—In gold alloy according to the present invention has a Vickers hardness of about 160 to 360.
  • the gold alloy according to the present invention has the same corrosion resistance as the conventional 18K gold alloy and the like, as will be described later.
  • a first aspect of the present invention is an alloy containing at least palladium (Pd) and indium (In), wherein the ratio of the weight of palladium to the weight of indium is between 0.92 and 1.5, and a Pd -In based gold alloy, wherein the content of the indium content of Jiumu is both 10 weight 0/0 above.
  • a third aspect of the present invention is a binary alloy comprising palladium (Pd), indium (In), and inevitable impurities, wherein the ratio of the weight of palladium to the weight of indium is between 0.92 and 1.5.
  • This is a Pd-In gold alloy.
  • a fourth aspect of the present invention is an alloy containing palladium (Pd), indium (In), and silver (Ag), wherein both the palladium content and the indium content are 10% by weight or more, and A Pd-In-based golden alloy characterized by having a silver content of 80% by weight or less.
  • a sixth aspect of the present invention is an alloy containing palladium (Pd), indium (In), and copper (Cu), wherein both the palladium content and the indium content are 10% by weight or more, and
  • the Pd-In gold alloy is characterized by having a copper content of 40% by weight or less.
  • a seventh aspect of the present invention is an alloy containing palladium (Pd) and indium (In), and the color tone is any of red gold, pink gold, yellow gold, and yellow gold. It is a Pd-In gold alloy characterized by exhibiting such a color tone.
  • An eighth aspect of the present invention is an alloy containing palladium (Pd) and indium (In), and further in the atmosphere, 30% dilute hydrochloric acid, 99.7% acetic acid, 30% dilute sulfuric acid, or 10% excess. It is a Pd-In gold alloy characterized by having good corrosion resistance in any environment of either acid or hydrogen water. The invention's effect
  • the gold alloy according to the present invention does not contain gold (Au) and copper (Cu)! However, it is a gold alloy exhibiting an elegant gold color. Therefore, it is possible to produce a gold alloy product exhibiting a gold color at a lower price than a conventional gold alloy containing pure gold and pure gold.
  • the gold alloy according to the present invention is less expensive than conventional gold alloys. On the other hand, it has corrosion resistance equivalent to that of conventional gold alloys (for example, 12K alloys).
  • the gold alloy product according to the present invention can be easily produced with a metal melting apparatus or the like as in the case of conventional gold alloys.
  • 18K gold alloys such as red gold, yellow gold, and green gold are the same as above to compare the color tone with the above various prototype alloys. It was produced by the method. Table 6 shows the composition of these comparative gold alloys (gold alloy symbols: 18K gold alloy ⁇ red, 18K gold alloy 'yellow, 18K gold alloy' green, 12K gold alloy 'yellow, etc.).
  • 18K gold alloys are used for luxury items such as golden finger rings, necklaces, and earrings.
  • the composition of 18K gold alloy for decoration is usually 75% of gold (Au), and the other components are copper (Cu) and silver (Ag).
  • the standard composition of 18K gold alloy is Au (75%), Cu (10-15%), Ag (10-15%), and it has the power to show yellow or yellow, gold color. Re! / If the ratio of copper is further increased, the color of the gold alloy becomes reddish and is called red 'gold'. Conversely, if the ratio of silver is further increased, the color becomes green and the color is called green 'gold.
  • an alloy that is a candidate for a gold alloy is an “alloy (or various alloys)”, and among the alloys, an alloy that exhibits a gold color according to the present invention is a “gold alloy” and the above alloy
  • gold alloys and others The 18K gold alloy and others produced to compare the colors are called “gold alloys and others”.
  • Table 1 shows the composition, surface state, color tone, Picker's hardness, etc. of the binary alloy having two metal forces of palladium (Pd) and indium (In). All of these binary alloys are alloys in which the mixing ratio of palladium (Pd) and indium (In) is changed, but strictly including inevitable impurities.
  • the prototype symbol 8020 is 80% by weight of palladium
  • Indium is a 20% strength alloy.
  • Prototype 4060 is an alloy composed of 40% by weight palladium and 60% by weight indium.
  • the weight ratio of palladium to indium that is, the value obtained by dividing the weight percent of palladium by the weight percent of indium is shown in the "Pd / In" column of Table 1.
  • the weight ratio (Pd / In) of palladium and indium is 4.00, and in the prototype symbol 4060, it is 0.67.
  • the color tone of each alloy after polishing is shown in the "Alloy color tone” column. Color is 18K gold alloy In addition, it was judged by comparing with the color map of the existing ternary alloy of three kinds of metallic power of gold 'silver' and copper. The color tone of each alloy was whitish when palladium was 62% by weight or more (8020, 7030, 6238) and yellow gold when 6040 (Pd / In was 1.50). As the palladium decreased and the indium increased, the gold became darker, and from 5248 to 4753 became a very dark red gold.
  • Prototype symbols 8020, 7030, and 6238 were judged to be “non-golden” because the color tone of the alloy with a high percentage of palladium was whitish gold and cannot be considered a gold alloy.
  • the color tone of the alloy changed as described above depending on the blending ratio of palladium and indium, it was determined as “gold” as the color tone.
  • the Vickers hardness was measured with various alloys of 5 points using a micro Vickers hardness tester with a weight of 500 gf and a calorie holding time of 10 seconds, and the average value and standard deviation were displayed. (Table 1 and others).
  • the weight ratio of palladium to indium is 0.89 or 0.67, the surface state is unsatisfactory. Therefore, the weight ratio of palladium and indium suitable for the golden alloy is specified to be between 0.92 and 1.50.
  • Table 7 shows the discoloration resistance test results for investigating the corrosion resistance of prototype symbols 5545 and 5050 among the binary alloys of palladium (Pd) and indium (In).
  • the 18K gold alloy 'red used for comparison did not change color in the atmosphere or in various reagent immersion experiments (circles), and was found to have excellent corrosion resistance, that is, the corrosion resistance evaluation was judged to be “excellent”.
  • the 12K gold alloy red containing 40% by weight of copper was slightly discolored with acetic acid (99.7%) ( ⁇ mark), but under other conditions, it was judged that the corrosion resistance evaluation without discoloration was “good”.
  • the copper-zinc alloy (prototype symbol Cu65Zn35) and the copper-aluminum alloy (prototype symbol Cu90A110) do not change color in the atmosphere, but discolor under other conditions (marked X), and the corrosion resistance evaluation was judged to be “impossible”. .
  • the binary alloys composed of two metals, palladium and indium, prototype symbols 5545 and 5050 did not change color under all conditions, and the corrosion resistance evaluation was judged to be “excellent”. It was done.
  • the corrosion resistance was evaluated as “excellent” for all the discoloration resistance test items that were rated as “Good”. In the test in item 1, the test was evaluated as “good”; As for the corrosion resistance of the golden alloy, those with “OK” or higher were judged to have good corrosion resistance.
  • Table 2 shows the composition, surface state, color tone, and the like of the ternary alloy having palladium, indium, and silver (Ag) forces.
  • the surface conditions were all good ( ⁇ mark).
  • the color of the alloy is bright (pink, yellow or yellow) for all alloys, and the color becomes lighter with increasing silver.
  • Table 7 shows the results of the discoloration resistance test of the ternary alloy composed of rhodium, indium and silver. With 4040Ag20 with a silver content of 20%, there is no discoloration under all conditions, and the corrosion resistance evaluation is
  • Table 3 shows the composition, surface state, color tone and the like of the ternary alloy having palladium, indium and copper (Cu) force.
  • the surface condition was good (circle mark), and the color tone was also judged as “golden”.
  • Table 7 shows the discoloration resistance test results of ternary alloys (4040Cu20, etc.) made of palladium, indium and copper.
  • each content of palladium and indium is 10% by weight or more, and the content of copper is 40% by weight. In the case of% or less, it was found that a golden alloy having a gold color and good corrosion resistance was produced.
  • Palladium, color tone of the indium gold (Au) or platinum group metal added alloy include gold (A U) All If example mosquitoes ⁇ gold and a force palladium, red than 5050 indium binary alloy My thinness is thin.
  • 5045Sn5 with tin (Sn) and 5045Ga5 with gallium (Ga) were both yellow gold.
  • 5049Irl with 1% iridium (Ir) and 5049Sil with 1% silicon (Si) were both red gold.
  • Table 4 shows the Vickers hardness of each alloy.
  • the ternary alloy (4040Au20) made of palladium, indium and gold (Au) did not change color in all discoloration resistance test items, and the corrosion resistance evaluation was judged as “excellent”.
  • Corrosion resistance of the above-mentioned binary alloys of palladium and indium (5545 5050), ternary alloy with 40% gold (Au) 4040Au20 and ternary alloy with platinum added 5045Pt5 5045Rh5 5045Ru5 5045 Sn5 5045Ga5 5049IrU 5049Sil
  • the evaluation was “excellent”, and it was found that the gold alloy based on palladium and indium has excellent corrosion resistance.
  • the weight ratio of palladium to indium is between 0.92 and 1.5, and the palladium content and indium content alloy content are both 10 wt% or more, 60 wt% or less of gold (Au) 20% by weight or less of platinum (Pt) 10 wt% or less of rhodium (Rh) 5-fold bulk 0/0 following ruthenium ( Ru), tin (Sn) or gallium (Ga), or less than 1% by weight
  • iridium (Ir) or silicon (Si) was added, it was found that gold-colored alloys having good corrosion resistance were produced.
  • the palladium-indium alloy according to the present invention maintains its golden color tone and has good corrosion resistance even if a plurality of other metals X are added as required.
  • Table 5 shows the composition, surface state, color tone, and the like of the quaternary alloy containing the above-described ternary alloy composed of palladium, indium, and silver (Ag) and other metal Y.
  • the color of the alloy is all yellow gold, and the color does not change depending on the added metal, antimony (Sb), germanium (Ge), zinc (Zn), aluminum (A1) or platinum (Pt). I got it.
  • o Polished surface is uniformly alloyed, free from cracks and color spots
  • Table 8 shows the results of examining the corrosion resistance of these alloys.
  • 10 10Ag80 with a total content of palladium and indium of 20% is a 1010Ag75Pt5 that has a corrosion resistance evaluation of “possible” and has a good corrosion resistance Pt.
  • the evaluation of corrosion resistance is “good”. While maintaining the gold color in this way, It is possible to produce an alloy having a good composition.
  • Palladium forms a total solid solution with silver, copper, gold, platinum, and rhodium, and also dissolves ruthenium to about 16% by weight.
  • silver forms a complete solid solution with gold
  • copper is a eutectic alloy with a solid solution range.
  • Platinum forms a solid solution with a rapid cooling from a liquid state.
  • Copper forms a solid solution with gold, platinum and rhodium in addition to palladium.
  • Gold forms a solid solution with platinum in addition to palladium, silver and copper.
  • palladium, silver, copper, gold, and platinum are easy to be alloyed except rhodium, ruthenium, and iridium.
  • Indium has a solid solubility limit, but dissolves in these metals.
  • rhodium, ruthenium and iridium are effective to be added in a small amount depending on the purpose of use because they refine the alloy crystal and improve its characteristics.
  • Tin, zinc, silicon, antimony, aluminum and gallium improve the forgeability, so it is effective to add a small amount.
  • the gold alloy according to the present invention does not contain gold (Au) and copper (Cu)! However, it is a gold alloy exhibiting an elegant gold color. Therefore, it is possible to produce a gold alloy product exhibiting a gold color at a lower price than a conventional gold alloy containing pure gold and pure gold.
  • the gold alloy according to the present invention is less expensive than conventional gold alloys. On the other hand, it has corrosion resistance equivalent to that of conventional gold alloys (for example, 12K alloys).
  • the gold alloy product according to the present invention can be easily produced with a metal melting apparatus or the like as in the case of conventional gold alloys.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Adornments (AREA)

Abstract

L'or et les alliages d'or classiques sont coûteux, alors que les alliages cuivre-zinc présentent une résistance médiocre à la corrosion quoique bon marché. De plus, l'alliage de nitrure de titane fritté possède l'inconvénient de nécessiter un équipement spécial et une technique spéciale, et ainsi de suite. L'invention a été accomplie sur la base de la découverte que des alliages consistant en palladium (Pd) et indium (In) brillent avec l'or bien que le palladium et l'indium soient tous deux des métaux blancs. Conformément à l'invention, les alliages Pd-In dorés sont dorés et avantageusement meilleur marché que l'or et les alliages d'or, présentant une excellente résistance à la corrosion et ne nécessitant pas d'équipement spécial pour la fabrication des alliages Pd-In.
PCT/JP2006/321985 2006-11-02 2006-11-02 Alliages pd-in dorés WO2008053559A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2006/321985 WO2008053559A1 (fr) 2006-11-02 2006-11-02 Alliages pd-in dorés

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012527529A (ja) * 2009-05-18 2012-11-08 ヘイマール ウント ミュール ゲゼルシャフト ミット ベシュレンクテル ハフツング パラジウム宝石合金
EP4407055A1 (fr) * 2023-01-27 2024-07-31 Jean-Claude Puippe Procédé d'obtention d'un composant en alliage palladium-indium ayant une bonne aptitude au façonnage

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50150629A (fr) * 1974-05-27 1975-12-03
JPS5651544A (en) * 1979-10-01 1981-05-09 Tokuriki Honten Co Ltd Silver alloy for casting
JPS57108233A (en) * 1980-11-06 1982-07-06 Heraeus Gmbh W C Alloy for silver base dental cast
JPS58204141A (ja) * 1982-05-21 1983-11-28 Sankin Kogyo Kk 黄金色を呈する鋳造用低カラツト金合金
JPS5916943A (ja) * 1982-07-16 1984-01-28 G C Dental Ind Corp 歯科用金合金
JPS59162240A (ja) * 1983-03-04 1984-09-13 インステイテユ−ト・メタルルギ−・イメニ・エ−・エ−・バイコバ・アカデミ−・ナウク・エスエスエスア−ル 広い範囲の色を有するパラジウム基合金
JPS60187638A (ja) * 1984-12-24 1985-09-25 Tokuriki Honten Co Ltd 鋳造用銀合金
JPS6415339A (en) * 1987-04-28 1989-01-19 Erefuanto Ederumetaale Bv Castable palladium alloy and production of tooth restoring substance, ornament and analogue
JPH01129939A (ja) * 1987-11-16 1989-05-23 Toyo Kagaku Kenkyusho:Kk 黄金色用歯科鋳造用合金

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50150629A (fr) * 1974-05-27 1975-12-03
JPS5651544A (en) * 1979-10-01 1981-05-09 Tokuriki Honten Co Ltd Silver alloy for casting
JPS57108233A (en) * 1980-11-06 1982-07-06 Heraeus Gmbh W C Alloy for silver base dental cast
JPS58204141A (ja) * 1982-05-21 1983-11-28 Sankin Kogyo Kk 黄金色を呈する鋳造用低カラツト金合金
JPS5916943A (ja) * 1982-07-16 1984-01-28 G C Dental Ind Corp 歯科用金合金
JPS59162240A (ja) * 1983-03-04 1984-09-13 インステイテユ−ト・メタルルギ−・イメニ・エ−・エ−・バイコバ・アカデミ−・ナウク・エスエスエスア−ル 広い範囲の色を有するパラジウム基合金
JPS60187638A (ja) * 1984-12-24 1985-09-25 Tokuriki Honten Co Ltd 鋳造用銀合金
JPS6415339A (en) * 1987-04-28 1989-01-19 Erefuanto Ederumetaale Bv Castable palladium alloy and production of tooth restoring substance, ornament and analogue
JPH01129939A (ja) * 1987-11-16 1989-05-23 Toyo Kagaku Kenkyusho:Kk 黄金色用歯科鋳造用合金

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012527529A (ja) * 2009-05-18 2012-11-08 ヘイマール ウント ミュール ゲゼルシャフト ミット ベシュレンクテル ハフツング パラジウム宝石合金
EP4407055A1 (fr) * 2023-01-27 2024-07-31 Jean-Claude Puippe Procédé d'obtention d'un composant en alliage palladium-indium ayant une bonne aptitude au façonnage

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