EP3177747A1 - Alliage de métaux précieux à solidification amorphe, à base de métaux précieux - Google Patents

Alliage de métaux précieux à solidification amorphe, à base de métaux précieux

Info

Publication number
EP3177747A1
EP3177747A1 EP15808100.0A EP15808100A EP3177747A1 EP 3177747 A1 EP3177747 A1 EP 3177747A1 EP 15808100 A EP15808100 A EP 15808100A EP 3177747 A1 EP3177747 A1 EP 3177747A1
Authority
EP
European Patent Office
Prior art keywords
mass
noble metal
metal alloy
range
platinum
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP15808100.0A
Other languages
German (de)
English (en)
Other versions
EP3177747B1 (fr
Inventor
Jochen Heinrich
Heinz-Günter Schenzel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
C Hafner GmbH and Co KG
Original Assignee
C Hafner GmbH and Co KG
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
Priority claimed from DE102014016723.2A external-priority patent/DE102014016723A1/de
Priority claimed from DE202014008963.9U external-priority patent/DE202014008963U1/de
Application filed by C Hafner GmbH and Co KG filed Critical C Hafner GmbH and Co KG
Publication of EP3177747A1 publication Critical patent/EP3177747A1/fr
Application granted granted Critical
Publication of EP3177747B1 publication Critical patent/EP3177747B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C27/00—Making jewellery or other personal adornments
    • A44C27/001—Materials for manufacturing jewellery
    • A44C27/002—Metallic materials
    • A44C27/003—Metallic alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C45/00—Amorphous alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C45/00—Amorphous alloys
    • C22C45/003—Amorphous alloys with one or more of the noble metals as major constituent
    • 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
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/14—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of noble metals or alloys based thereon
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B37/00—Cases
    • G04B37/22—Materials or processes of manufacturing pocket watch or wrist watch cases
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C2200/00—Crystalline structure
    • C22C2200/02—Amorphous

Definitions

  • the invention relates to an amorphous solidifying noble metal alloy containing platinum and / or palladium, a process for their preparation and an article made on the basis of this noble metal alloy, in particular jewelry such as a piece of jewelry, a clock, a watch case, or a writing instrument ,
  • Amorphous solidifying precious metal alloys based on precious metals are increasingly used, especially in the jewelry or watch industry, as they have an extraordinary combination of mechanical properties, especially in terms of their strength and elasticity, which by no other
  • amorphous solidifying metallic precious metal alloys are characterized by a significantly higher hardness compared to conventional crystalline noble metal alloys of comparable composition.
  • Another advantage of amorphous solidifying metals is the combination of mechanical properties with the possibility of near-net shape processing by casting or thermoplastic molding: The processing of such amorphous solidifying metals goes hand in hand without solidification shrinkage and leads to mechanically high-strength workpieces. When casting such amorphous solidifying metals, the maximum achievable thickness of completely amorphous solidified workpieces is limited by the critical cooling rate of the respective noble metal alloy.
  • thermoplastic molding amorphous workpieces may be deformed or bonded at temperatures above the glass transition temperature T g , thereby producing thin-walled, hollow, large area and / or surface structured workpieces having dimensions beyond the critical thickness.
  • the first amorphous noble metal alloy based on precious metals was a binary precious metal alloy in the Au-Si system. Starting from this system, the hitherto most well-known amorphous precious metal alloy having the composition Au 4 9Ag5.5Pd2.3Cu26.9Sii6.3 from Liquidmetal Technologies Inc. was developed, the abovementioned proportions being expressed in atomic percentages. In mass percent this corresponds to Au76.3 Ag 4l 7 Pdi, 9 Cui3.5 Si3.6.
  • This precious metal alloy with an 18-karat gold content has a hardness of 360 HV and therefore exceeds the hardness value of a color-comparable crystalline precious metal alloy by more than 50%.
  • No. 4,746,584 A1 describes metal electrodes formed from an amorphous metal according to the formula PtpAaDd, where A is iridium, palladium, rhodium, ruthenium or a mixture thereof and D is boron, aluminum, arsenic, phosphorus, antimony, Germanium, silicon or Sicillium or a mixture thereof.
  • the mass fraction p is in the range of 40-82%, that of a in the range of 1-40% and that of d in the range between 8-40%, wherein the mass fractions p, a and d to 100 wt .-% complementary ,
  • This amorphous precious metal alloy is characterized by being always contains two elements from the platinum group, namely always platinum and another element of the platinum group.
  • EP 0 267 318 A2 is a crystalline noble metal alloy for
  • Jewelery purposes which consists of 75 wt .-% to 99.5 wt .-% palladium as a base metal with additions of metals of the 3rd to 6th period of the periodic table of the elements.
  • a crystalline platinum jewelery alloy which comprises 50% by weight to 70% by weight of platinum, 2% by weight to 15% by weight of at least one element selected from the group Indium, gallium, germanium, tin and zinc and 0.5 wt .-% to 40 wt .-% silver or copper.
  • a method for producing a semifinished product of the noble metal alloy according to the invention is to be created. Further objects of the invention are the provision of a semifinished product, in particular for the production of jewelry, as well as in the use of the precious metal alloy according to the invention for the production of a jewelry article as well as in the creation of a jewelry article.
  • the noble metal alloy according to the invention has a composition according to AaBbCc, wherein A is at least one element selected from the group consisting of Pt and Pd, B is at least one element selected from the group consisting of Al, Au, Ag, Cu, and C is at least one Element of a group consisting of Ga and Ge, wherein the mass fraction a in the range of 45-60 mass percent, preferably in the range of 45-59 mass percent, more preferably in the range of 48 to 54 mass percent, the mass fraction b in the range from 39-55 Percent by mass preferably in the range of 39-49 mass%, more preferably in the range of 40-47 mass%, and the mass fraction c in the range of 0-13 mass%, preferably in the range of 1-13 mass%, more preferably in the range of 2 to 10 mass% and in particular preferably in the range from 2 to 5% by mass, the precious metal alloy preferably not having aluminum as the sole alloying component of group B in a simultaneous presence of platinum and palladium, and the abovementi
  • the inventive measures a platinum alloy is created, which is nickel and / or phosphorus-free, and yet has a good glass forming ability.
  • the precious metal alloy according to the invention is characterized by a high resistance to corrosion and tarnishing and is therefore particularly suitable for the production of high-quality workpieces such. B. pieces of jewelry suitable.
  • the noble metal alloys according to the invention have the advantage that they contain no nickel and / or phosphorus. This significantly simplifies their production and material recycling.
  • the precious metal alloys are also harmless in terms of any allergies, which is particularly advantageous for use in the jewelry and watch industry, where the corresponding piece of jewelry often directly and for a long time in direct contact with the skin, is beneficial.
  • the inventive method for producing a semifinished product of an amorphous solidifying noble metal alloy suggests that a masses of at least one element of the aforementioned group A, b mass fractions of at least one element of the aforementioned group B and c mass fractions of at least one element of the aforementioned group C alloyed and to the Semi-finished products are poured.
  • an amorphous solidifying noble metal alloy characterized by the composition A a Bb C c , is used for producing a jewelery article, in particular a jewel, a watch of a watch case, a watch strap, a writing instrument or a part of such an article at least one noble metal from a group consisting of platinum and palladium, B at least one element from a group consisting of Al, Au, Ag and Cu, C denotes at least one element from a group consisting of Ga and Ge wherein the mass fraction a is in the range of 45-60% by mass, preferably in the range of 45-59% by mass, more preferably in the range of 48-54% by mass, the mass fraction b in the range of 39-49 55% by mass, preferably in the range of 39% 55% by mass, more preferably in the range of 39 to 49% by mass, more preferably in the range of 40 to 47% by
  • the first three embodiments of a platinum-based noble metal alloy belong to the Pt-Ag-Cu system.
  • a first embodiment of a platinum-based noble metal alloy is given by Pt53.2Ag3i, 4Cui2.2Ga3.2. This precious metal alloy is characterized by a favorable glass forming ability.
  • a second embodiment provides that the noble metal alloy
  • Pt5oAG33,8Cui3,2Ga3 is.
  • the next three embodiments relate to an amorphous solidified noble metal alloy whose main components are Pt-Al-Cu.
  • the fourth embodiment is the noble metal alloy
  • the fifth embodiment consists of the noble metal alloy Pt50Al38,5Cu8,5Ga3.
  • the seventh and eighth embodiments each describe a noble metal alloy of Pt-Au-Ag-Cu system.
  • the corresponding noble metal alloys are exemplified by Pt5oAu23.5Agi7Cu6.5Ga3 and
  • the abovementioned eight embodiments thus describe amorphously solidifying platinum-based noble metal alloys which are characterized by the following composition: Pt a Bb C c , where Pt is platinum, B is at least one element from a group consisting of Al, Au, Ag and Cu is defined, and C defines at least one member of the group consisting of Ga and Ge.
  • the parameter a stands for the platinum content of the described noble metal alloys with 45-60 mass percent, the parameter b for 39 to 55 mass percent, preferably 39-49 mass percent and the parameter c for 0-13 mass percent.
  • platinum in a proportion of 45-60 mass%, in particular from 45 to 59% by mass, more preferably 48-54% by mass, in particular in a proportion of 49 to 51% by mass or 50-54% by mass and for the latter range further especially in a proportion of 50-52 mass% is present in the described precious metal alloys.
  • the latter areas are characterized by a particularly favorable glass-forming ability.
  • the proportion b of one or more metals from group B is 39 to 55 mass%, preferably 39-49 mass%, preferably 40-47 mass% and especially 42-47 mass%.
  • the ninth embodiment is a noble metal alloy associated with the Pd-Ag-Cu system and is made of Pd5oAg3 Cui3Ga3. Again, a favorable glass forming ability is given.
  • the noble metal alloys described above can thus be characterized by Pd a B ⁇ C c , where Pd for palladium and B and C in turn for at least one element from the above-described groups AI, Au, Ag, Cu or Ga, Ge.
  • the proportion a of palladium in this case is again 45-60% by mass, preferably 45-59% by mass, more preferably 48-54% by mass, more preferably 49-51% by mass or 50-54 and in this case preferably 50-52% by mass, in particular in the latter Concentration areas a particularly favorable glass forming ability is given.
  • the proportion b of the group B element (s) is 39 to 55% by mass, preferably 39-49% by mass, more preferably 40-47% by mass, and still more preferably 42-47% by mass.
  • the proportion of gallium and / or germanium is 0-13 mass%, with the preferred ranges given for the platinum-based amorphous precious metal alloys described in paragraph 1 above correspondingly for palladium.
  • the ratio of the atomic proportions of palladium and aluminum is greater than or equal to 4.
  • This atomic ratio of palladium to aluminum corresponds to a mass ratio of palladium to aluminum of greater than or equal to 94/6; It is thus preferred that the ratio of the proportions of palladium and aluminum - expressed in mass ratios - is greater than or equal to 15.67.
  • an example of such an alloy is an alloy containing 45 to 60 mass percent palladium, 39 to 55 mass percent of at least two group B and gallium and / or germanium elements of 0 to 13 mass percent, but with the proviso that: the first of at least two metals from group B are aluminum, with aluminum being equivalent the proportion of palladium in the range of 45 to 60% by mass and the aforementioned ratio between palladium and aluminum - in a proportion of at most 45 / 15.67 to 60 / 15.67, that is in a proportion from 2.87 to 3.83 mass percent is; the remainder of the fraction b of the at least two elements from the group B is provided by at least one further element from the aforementioned group B.
  • the abovementioned preferred ranges apply to the parts a. b and c again accordingly.
  • the platinum-palladium alloys are thus characterized by (Ptai Pda2) a Bt> Cc, whereby for the mass fractions a, b and c again preferably the values given in Sections 1 .3 and 2.3 apply correspondingly.
  • the ratio of the atomic proportions of palladium and aluminum is greater than or equal to 4.
  • the explanations given at the end of section 2.3 also apply to a combination of platinum and palladium.
  • the following alloy is to be given: This alloy has platinum and palladium in a total proportion of 55 percent by mass, assuming 50 percent by weight of platinum and 5 percent by weight of palladium.
  • the proportion of elements from group B here exemplarily aluminum and copper, is between 40 and 45 mass percent, optionally containing a corresponding proportion c of elements of group C.
  • the proportion of aluminum is then less than 0.32 mass percent and the proportion of copper is in the range of 39.7 to 24.7 mass percent.
  • platinum or palladium in the simultaneous presence of platinum and palladium, one of the two elements, so either platinum or palladium, each in a proportion of more than 50 mass percent is present to the Punzierallo such a noble metal alloy with at least 50 mass percent of Platinum or palladium, or in a proportion of only slightly less than 50 mass percent is present.
  • the proportion of platinum may be 50-59 mass%, that is, palladium is then present in only 1 mass percent.
  • the proportion of platinum may be 50-59 mass%, that is, palladium is then present in only 1 mass percent.
  • the proportion of platinum may be 50-59 mass%, that is, palladium is then present in only 1 mass percent.
  • the proportion of platinum may be 50-59 mass%, that is, palladium is then present in only 1 mass percent.
  • the proportion of platinum may be 50-59 mass%, that is, palladium is then present in only 1 mass percent.
  • the proportion of platinum may be 50-59 mass%, that is, palladium is then present in only
  • the preparation of the abovementioned noble metal alloys is described by way of example with reference to the first embodiment.
  • the production of the other noble metal alloys comprising the abovementioned compositions A a Bb C c is carried out accordingly: 53.2 parts by weight of platinum, 31, 4 parts by weight of silver, 12.2 parts by weight of copper and 3 , 2 mass fractions of gallium alloyed and cast as a massive semi-finished product.
  • the semi-finished product is melted in the next step and processed in a rapid solidification process. Preference is given here an atomization of the melt in an inert gas stream, by means of a device and a method which z. B. in German Patent DE 103 40 606 B4 are described.
  • the material When atomizing the melt at a starting temperature of 1250 ° C. in a stream of nitrogen at an outlet pressure of 10 bar, the material solidifies in fractions of a second in the form of amorphous powders, which typically have an average particle diameter of 25 ⁇ m.
  • the amorphous powder has a glass transition temperature T g of about 290 ° C and a crystallization temperature Tx of about 450 ° C.
  • thermoplastic molding under pressure TPF process
  • injection molding of plasticized amorphous semifinished materials at temperatures above the glass transition temperature is possible.
  • the precious metal alloys described are particularly suitable for the production of jewelry such as jewelry, watches, watch cases, writing instruments and components of the aforementioned goods.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • General Physics & Mathematics (AREA)
  • Adornments (AREA)
  • Powder Metallurgy (AREA)

Abstract

L'invention concerne un alliage de métaux précieux à solidification amorphe, caractérisé par la composition suivante, AaBbCc dans laquelle : - A désigne au moins un métal précieux d'un groupe constitué par le platine ou le palladium; - B désigne au moins un élément d'un groupe constitué par Al, Au, Ag et Cu; - C désigne au moins un élément d'un groupe qui est constitué de Ga et Ge. La part en masse a se situe dans une plage de 45-60 % en masse, de préférence dans une plage de 45-59 % en masse, de préférence encore dans une plage de 48-54 % en masse, la part en masse b se situe dans une plage de 39-55 % en masse, de préférence dans une plage de 39-49 % en masse, de préférence encore dans une plage de 40-47 % en masse, et la part en masse c se situe dans une plage de 0-13 % en masse, de préférence dans une plage de 1-13 % en masse, de préférence encore dans une plage de 2-10 % en masse, et de préférence encore dans une plage de 2-5 % en masse, les parts en masse ci-dessus a, b et c donnant un total de 100 % en masse, abstraction faite des additions, impuretés et tolérances des alliages habituelles.
EP15808100.0A 2014-11-13 2015-11-13 Alliage de métaux précieux à solidification amorphe, à base de métaux précieux Active EP3177747B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102014016723.2A DE102014016723A1 (de) 2014-11-13 2014-11-13 Amorph erstarrende Legierung auf Edelmetallbasis
DE202014008963.9U DE202014008963U1 (de) 2014-11-13 2014-11-13 Amorph erstarrende Legierung auf Edelmetallbasis
PCT/EP2015/002279 WO2016074796A1 (fr) 2014-11-13 2015-11-13 Alliage de métaux précieux à solidification amorphe, à base de métaux précieux

Publications (2)

Publication Number Publication Date
EP3177747A1 true EP3177747A1 (fr) 2017-06-14
EP3177747B1 EP3177747B1 (fr) 2018-01-10

Family

ID=54848522

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15808100.0A Active EP3177747B1 (fr) 2014-11-13 2015-11-13 Alliage de métaux précieux à solidification amorphe, à base de métaux précieux

Country Status (3)

Country Link
US (1) US20170241004A1 (fr)
EP (1) EP3177747B1 (fr)
WO (1) WO2016074796A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107779790B (zh) * 2017-09-25 2019-04-19 北京科技大学 一种含锗无镍无磷大尺寸钯基非晶合金及其制备方法
CH715163A2 (fr) * 2018-07-10 2020-01-15 Blancpain Sa Composant d'horlogerie avec partie arbrée en alliage amagnétique.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0267318A3 (fr) * 1986-11-13 1989-01-11 C. HAFNER GmbH & Co. Alliage pour objets de parure
US6749698B2 (en) * 2000-08-07 2004-06-15 Tanaka Kikinzoku Kogyo K.K. Precious metal based amorphous alloys
WO2006066215A2 (fr) * 2004-12-17 2006-06-22 Liquidmetal Technologies, Inc. Alliages amorphes a solidification en masse presentant des proprietes mecaniques ameliorees
KR100701027B1 (ko) * 2005-04-19 2007-03-29 연세대학교 산학협력단 연성이 우수한 단일상 비정질 합금
DE102007006623A1 (de) * 2007-02-06 2008-08-07 Burger, Bernhard, Dr. Platinlegierung sowie ein Verfahren zu deren Herstellung und ein aus der Platinlegierung hergestelltes Schmuckstück, insbesondere einen Trauring
US8066827B2 (en) * 2007-07-12 2011-11-29 California Institute Of Technology Ni and Cu free Pd-based metallic glasses
DE202009013202U1 (de) * 2009-04-07 2009-12-24 Heimerle + Meule Gmbh Platin-Schmucklegierung

Also Published As

Publication number Publication date
US20170241004A1 (en) 2017-08-24
WO2016074796A1 (fr) 2016-05-19
EP3177747B1 (fr) 2018-01-10

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