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EP2548982A1 - Refined titanium alloy - Google Patents

Refined titanium alloy Download PDF

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Publication number
EP2548982A1
EP2548982A1 EP12175562A EP12175562A EP2548982A1 EP 2548982 A1 EP2548982 A1 EP 2548982A1 EP 12175562 A EP12175562 A EP 12175562A EP 12175562 A EP12175562 A EP 12175562A EP 2548982 A1 EP2548982 A1 EP 2548982A1
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EP
European Patent Office
Prior art keywords
titanium
alloy
precious metal
alloy according
alloyed
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.)
Withdrawn
Application number
EP12175562A
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German (de)
French (fr)
Inventor
Olivier Piotrowski
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.)
Titanium Engineering Sarl
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Titanium Engineering Sarl
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Filing date
Publication date
Application filed by Titanium Engineering Sarl filed Critical Titanium Engineering Sarl
Publication of EP2548982A1 publication Critical patent/EP2548982A1/en
Withdrawn legal-status Critical Current

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Classifications

    • GPHYSICS
    • G04HOROLOGY
    • G04BMECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B37/00Cases
    • G04B37/22Materials or processes of manufacturing pocket watch or wrist watch cases
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C14/00Alloys based on titanium

Definitions

  • This invention refers to the technical field of metallurgy, in particular to the technical field of alloys consisting of titanium and at least one other material.
  • titanium possesses in particular a high specific mechanical strength and a very high resistance to corrosion in different aggressive environments.
  • strength of titanium can be further improved by adding alloying elements such as aluminum and vanadium.
  • the density of titanium is 40% lower than that of carbon steels, making it particularly suitable for different applications where the relationship between weight and strength of materials play an important role.
  • titanium The corrosion resistance of titanium is accompanied by resistance to erosion by fluids loaded with abrasive products (eg sand in seawater), fire and chemical attack. These properties are mainly due to the ability of titanium to passivate by the formation of an oxide protective film. Titanium thus resists perfectly all natural environments (atmosphere, seawater, ...) and many chemicals, especially those containing chlorine.
  • titanium Another remarkable property of titanium is its good biocompatibility, so essentially the property of a material not to induce negative reactions when it is brought into contact with biological tissues (eg skin, bone, blood, etc.). Indeed, a large part of Surgical instruments and medical implants are today made of a suitable titanium alloy.
  • titanium in the fields of jewelery, jewelery or watchmaking remains rather symbolic.
  • the aesthetic aspects of titanium make it rather uninteresting for those areas in which the appearance and dollar value of the products still play a vital role.
  • the most used metals in the fields of jewelery, jewelery and high-end watchmaking are precious metals, in particular gold, silver, platinum or palladium. These metals are particularly appreciated for the aesthetic properties, but also for the economic value.
  • the present invention therefore aims to provide a new material, especially for the production of timepieces and / or jewelry, to overcome the limitations of the state of the art mentioned above, also reducing significantly the production costs of the parts.
  • the advantage of this invention over all known solutions in the state of the art is that the resulting alloy has a very advantageous combination of properties.
  • the proposed new material has the mechanical properties of titanium, namely a very good resistance to corrosion and other chemical attacks, as well as a high mechanical hardness and strength.
  • this new alloy also has properties inherited from precious metals, including excellent polishability, good gloss, and a specific color with different reflections depending on the precious metal content.
  • this new material can also be easily colored, thanks to the completely preserved titanium coloring properties.
  • the objectives of the present invention are effectively achieved by using an alloy which is made of titanium and at least one other material, containing between 50% and 99% titanium and between 1% and 50% of the other material, and wherein the other material is a precious metal.
  • the hardness and color of the alloy, as well as its monetary value depend essentially on the amount of precious metals used in the alloy.
  • the variety of colors of the alloy according to the invention can range from green or blue to gray, via pink or pale yellow, depending on the specific needs.
  • the precious metal used in the alloy may be any one between gold, silver, platinum or palladium.
  • the precious metal used in the alloy may be any one between gold, silver, platinum or palladium.
  • other materials metal or non-metals
  • titanium and the precious metal are alloyed under controlled atmosphere and / or under pressure. Titanium and precious metal are alloyed in a closed enclosure to obtain conditions of pressure and controlled atmosphere. Indeed, it is important given the avidity of titanium to oxygen to work under a neutral atmosphere free of oxygen. To do this a relatively high vacuum is made in the enclosure of the machine after introduction of the alloying elements. Only when oxygen is removed or replaced by a neutral gas such as argon are the elements melted and alloyed by electrical discharge. This gives alloys with properties perfectly mastered.
  • the parts in question being notably watchmaking elements intended to be polished.
  • the piece in question can notably be a watch case, a bracelet, a crown, certain elements of a movement, such as a platinum, bridges, etc. Of course, other pieces are absolutely possible.

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

Abstract

Alloy comprises 50-99% of titanium and 1-50% of at least one other material, which is a precious metal. An independent claim is included for manufacturing the alloy, comprising controlling the titanium and precious metal alloy under atmosphere and pressure.

Description

Domaine technique de l'inventionTechnical field of the invention

Cette invention se réfère au domaine technique de la métallurgie, en particulier au domaine technique des alliages constitués de titane et d'au moins un autre matériau.This invention refers to the technical field of metallurgy, in particular to the technical field of alloys consisting of titanium and at least one other material.

Etat de la techniqueState of the art

L'utilisation industrielle du titane et de ses alliages a commencé au début des années cinquante. En effet, avant les années quarante, il n'était pas possible de produire, à des coûts raisonnables, ce métal qui a plusieurs propriétés avantageuses. Du point de vue technologique, le titane possède notamment une résistance mécanique spécifique élevée et une résistance à la corrosion très grande dans différents environnements agressifs. En outre, la résistance mécanique du titane peut encore être améliorée par addition d'éléments d'alliage tels que l'aluminium et le vanadium. En même temps, la densité du titane est de 40 % inférieure à celle des aciers au carbone, ce qui le rend particulièrement adapté pour différentes applications où le rapport entre le poids et la résistance des matériaux jouent un rôle important.The industrial use of titanium and its alloys began in the early 1950s. Indeed, before the forties, it was not possible to produce, at reasonable costs, this metal which has several advantageous properties. From a technological point of view, titanium possesses in particular a high specific mechanical strength and a very high resistance to corrosion in different aggressive environments. In addition, the strength of titanium can be further improved by adding alloying elements such as aluminum and vanadium. At the same time, the density of titanium is 40% lower than that of carbon steels, making it particularly suitable for different applications where the relationship between weight and strength of materials play an important role.

La résistance à la corrosion du titane est accompagnée d'une résistance à l'érosion par des fluides chargés de produits à caractère abrasif (p.ex. sable dans l'eau de mer), au feu et aux attaques chimiques. Ces propriétés sont principalement dues à l'aptitude du titane à se passiver par la formation d'un film protecteur d'oxyde. Ainsi, le titane résiste parfaitement à tous les milieux naturels (atmosphère, eau de mer,...) et à de nombreux produits chimiques, en particulier à ceux qui contiennent du chlore.The corrosion resistance of titanium is accompanied by resistance to erosion by fluids loaded with abrasive products (eg sand in seawater), fire and chemical attack. These properties are mainly due to the ability of titanium to passivate by the formation of an oxide protective film. Titanium thus resists perfectly all natural environments (atmosphere, seawater, ...) and many chemicals, especially those containing chlorine.

Une autre propriété remarquable du titane est sa bonne biocompatibilité, donc essentiellement la propriété d'un matériau à ne pas induire de réactions négatives lorsqu'il est mis en contact avec des tissus biologiques (p.ex. la peau, l'os, le sang, etc.). En effet, une grande partie des instruments chirurgicaux et des implants médicaux sont aujourd'hui fabriqués en un alliage de titane approprié.Another remarkable property of titanium is its good biocompatibility, so essentially the property of a material not to induce negative reactions when it is brought into contact with biological tissues (eg skin, bone, blood, etc.). Indeed, a large part of Surgical instruments and medical implants are today made of a suitable titanium alloy.

D'autre côté, l'utilisation du titane dans les domaines de la bijouterie, de la joaillerie ou de l'horlogerie reste plutôt symbolique. Malgré ces différents avantages technologiques, les aspects esthétiques du titane le rendent plutôt inintéressant pour ces domaines dans lesquels l'apparence et la valeur monétaire des produits jouent toujours un rôle primordial. Dû à ce fait, les métaux les plus utilisés dans les domaines de la joaillerie, de la bijouterie et de l'horlogerie haut de gamme sont les métaux précieux, en particulier l'or, l'argent, le platine ou le palladium. Ces métaux sont notamment appréciés pour les propriétés esthétiques, mais également par la valeur économique.On the other hand, the use of titanium in the fields of jewelery, jewelery or watchmaking remains rather symbolic. Despite these different technological advantages, the aesthetic aspects of titanium make it rather uninteresting for those areas in which the appearance and dollar value of the products still play a vital role. Due to this fact, the most used metals in the fields of jewelery, jewelery and high-end watchmaking are precious metals, in particular gold, silver, platinum or palladium. These metals are particularly appreciated for the aesthetic properties, but also for the economic value.

Bien que le plus précieux, l'or pur, donc allié à aucun autre métal, est assez peu utilisé en bijouterie ou en horlogerie. En effet, l'or pur est un métal assez mou et plastique et il n'a pas toujours la consistance nécessaire pour toutes les applications. En particulier, l'utilisation de l'or pur dans la production des boîtiers de montres reste assez peu courante vu d'un côté ces propriétés mécaniques désavantageuses et d'autre côté son prix prohibitif pour une application à large échelle. En ce qui concerne l'argent, il est bien plus adapté pour une utilisation comme matériau des boîtiers, mais c'est cette fois à cause de sa caractéristique à se ternir très rapidement qu'il est très peu utilisé dans la fabrication haut de gamme. Concernant le platine, c'est le seul utilisé à l'état pur mais de manière sporadique à cause de son prix et de la difficulté de mise en oeuvre.Although the most precious, pure gold, so allied to any other metal, is not used much in jewelry or watchmaking. Indeed, pure gold is a fairly soft and plastic metal and it does not always have the necessary consistency for all applications. In particular, the use of pure gold in the production of watch cases remains rather unusual considering on one side these disadvantageous mechanical properties and on the other hand its prohibitive price for a large scale application. Regarding the money, it is much more suitable for use as a material of the housings, but this time because of its characteristic to tarnish very quickly that it is very little used in the high-end manufacturing . Regarding platinum, it is the only one used in its pure state but sporadically because of its price and the difficulty of implementation.

II serait donc préférable de trouver un matériau, notamment pour la production des boîtiers de montres, qui combinerait les avantages technologiques (une résistance mécanique élevée et une inertie chimico-physique presque parfaite, combinées avec une petite densité et une excellente biocompatibilité) de titane avec les avantages esthétiques et valorisante des métaux précieux.It would therefore be preferable to find a material, especially for the production of watch cases, which would combine the technological advantages (high mechanical strength and almost perfect chemical-physical inertia, combined with a low density and excellent biocompatibility) of titanium with the aesthetic and enhancing benefits of precious metals.

Exposé de l'inventionPresentation of the invention

La présente invention a alors pour objet de proposer un nouveau matériau, notamment pour la production des pièces d'horlogerie et/ou de joaillerie, permettant de s'affranchir des limitations de l'état de la technique mentionnées ci-dessus, en réduisant également de façon significative les coûts de production des pièces.The present invention therefore aims to provide a new material, especially for the production of timepieces and / or jewelry, to overcome the limitations of the state of the art mentioned above, also reducing significantly the production costs of the parts.

Selon un premier aspect de la présente invention ces objectifs sont notamment atteints à l'aide d'un alliage selon la revendication indépendante 1.According to a first aspect of the present invention, these objectives are achieved in particular by means of an alloy according to independent claim 1.

L'avantage de cette invention par rapport à toutes les solutions connues dans l'état de la technique est que l'alliage résultant présente une combinaison de propriétés très avantageuse. D'un côté, le nouveau matériau proposé possède les propriétés mécaniques du titane, à savoir une très bonne résistance à la corrosion et autres attaques chimiques, ainsi qu'une grande dureté et résistance mécaniques. En même temps, ce nouvel alliage possède également les propriétés héritées des métaux précieux, notamment une excellente polissabilité, une bonne brillance, ainsi qu'une couleur spécifique avec reflets différents selon la teneur en métal précieux. De même, ce nouveau matériau peut également être facilement coloré, grâce aux propriétés de coloration du titane complètement conservées.The advantage of this invention over all known solutions in the state of the art is that the resulting alloy has a very advantageous combination of properties. On the one hand, the proposed new material has the mechanical properties of titanium, namely a very good resistance to corrosion and other chemical attacks, as well as a high mechanical hardness and strength. At the same time, this new alloy also has properties inherited from precious metals, including excellent polishability, good gloss, and a specific color with different reflections depending on the precious metal content. Likewise, this new material can also be easily colored, thanks to the completely preserved titanium coloring properties.

Selon un autre aspect de la présente invention, il est prévu un procédé de fabrication de l'alliage selon la revendication 5.According to another aspect of the present invention there is provided a method of manufacturing the alloy according to claim 5.

Selon un autre aspect de la présente invention, il est prévu une pièce d'horlogerie, bijouterie et/ou de joaillerie selon la revendication 8.According to another aspect of the present invention, there is provided a timepiece, jewelery and / or jewelry according to claim 8.

Les autres aspects de la présente invention se trouvent dans les revendications dépendantes.The other aspects of the present invention are in the dependent claims.

Description détaillée des modes de réalisationDetailed Description of the Embodiments

Ci-après quelques modes de réalisation non-limitatifs de la présente invention seront décrits plus en détail.Hereinafter some non-limiting embodiments of the present invention will be described in more detail.

Selon un aspect de la présente invention, les objectifs de la présente invention sont effectivement atteints à l'aide d'un alliage qui est constitué de titane et d'au moins un autre matériau, contenant entre 50% et 99% de titane et entre 1% et 50% de l'autre matériau, et dans lequel l'autre matériau est un des métaux précieux.According to one aspect of the present invention, the objectives of the present invention are effectively achieved by using an alloy which is made of titanium and at least one other material, containing between 50% and 99% titanium and between 1% and 50% of the other material, and wherein the other material is a precious metal.

La dureté et la couleur de l'alliage, ainsi que sa valeur pécuniaire dépendent essentiellement de la quantité des métaux précieux utilisés dans l'alliage.The hardness and color of the alloy, as well as its monetary value depend essentially on the amount of precious metals used in the alloy.

La variété des couleurs de l'alliage selon l'invention peut aller du vert ou bleu au gris, en passant par le rose ou le jaune pâle, en fonction des besoins concrets.The variety of colors of the alloy according to the invention can range from green or blue to gray, via pink or pale yellow, depending on the specific needs.

De manière notable, le métal précieux utilisé dans l'alliage peut être l'un quelconque entre l'or, l'argent, le platine ou le palladium. Bien entendu, il est également possible d'utiliser d'autres matériaux (métaux ou non-métaux) dans l'élaboration de l'alliage selon l'un des modes de réalisation préférés de la présente invention.Notably, the precious metal used in the alloy may be any one between gold, silver, platinum or palladium. Of course, it is also possible to use other materials (metals or non-metals) in the production of the alloy according to one of the preferred embodiments of the present invention.

Selon un de ces modes de réalisation préférés, l'alliage contient uniquement le titane et un seul métal précieux, sous réserve d'impuretés inévitables. Typiquement, l'alliage selon l'invention contiendra entre 85% et 95% de titane et entre 5% et 15% du métal précieux. Les meilleurs résultats au niveau de combinaison de propriétés souhaitées seront atteints avec un taux de métal précieux d'environ 10%. Par exemple et en particulier on peut obtenir un alliage titane-or 90-10 avec les caractéristiques suivantes :

  • couleur blanche avec reflet doré ;
  • polissabilité parfaite ;
  • traitement électro plasma possible ; et
  • dureté 350 Hv.
According to one of these preferred embodiments, the alloy contains only titanium and a single precious metal, subject to unavoidable impurities. Typically, the alloy according to the invention will contain between 85% and 95% of titanium and between 5% and 15% of the precious metal. The best results in combination of desired properties will be achieved with a precious metal content of about 10%. For example, and in particular, a 90-10 titanium-gold alloy can be obtained with the following characteristics:
  • white color with golden reflection;
  • perfect polishability;
  • possible electro-plasma treatment; and
  • hardness 350 Hv.

Nous tenons à préciser que les objets assignés à l'invention sont également atteints à l'aide d'un procédé pour la fabrication de l'alliage, ainsi qu'à l'aide d'une pièce d'horlogerie et/ou de joaillerie fabriquée en cet alliage.We wish to clarify that the objects assigned to the invention are also achieved by means of a process for the manufacture of the alloy, as well as with a timepiece and / or jewelry made of this alloy.

Notamment, le titane et le métal précieux sont alliés sous atmosphère et/ou sous pression contrôlées. Le titane et le métal précieux sont alliés dans une enceinte close permettant d'obtenir des conditions de pression et d'atmosphère contrôlée. En effet, il est important vu l'avidité du titane envers l'oxygène de travailler sous une atmosphère neutre exempte d'oxygène. Pour ce faire un vide relativement poussé est effectué dans l'enceinte de la machine après introduction des éléments d'alliage. Ce n'est qu'une fois l'oxygène éliminé ou remplacé par un gaz neutre tel que l'argon que les éléments sont fondus et alliés par décharge électrique. On obtient ainsi des alliages avec des propriétés parfaitement maitrisées.In particular, titanium and the precious metal are alloyed under controlled atmosphere and / or under pressure. Titanium and precious metal are alloyed in a closed enclosure to obtain conditions of pressure and controlled atmosphere. Indeed, it is important given the avidity of titanium to oxygen to work under a neutral atmosphere free of oxygen. To do this a relatively high vacuum is made in the enclosure of the machine after introduction of the alloying elements. Only when oxygen is removed or replaced by a neutral gas such as argon are the elements melted and alloyed by electrical discharge. This gives alloys with properties perfectly mastered.

Les pièces en question étant notablement des éléments d'habillage horloger destinés à être polis. La pièce en question peut notablement être un boîtier de montre, un bracelet, une couronne, certains éléments d'un mouvement, tels qu'une platine, des ponts, etc. Bien entendu, d'autres pièces sont absolument possibles.The parts in question being notably watchmaking elements intended to be polished. The piece in question can notably be a watch case, a bracelet, a crown, certain elements of a movement, such as a platinum, bridges, etc. Of course, other pieces are absolutely possible.

Les détails de production de l'alliage selon l'invention qui ne sont pas explicitement décrits dans cette demande de brevet peuvent être compris par un homme du métier, en application de ses connaissances ordinaires.The production details of the alloy according to the invention which are not explicitly described in this patent application can be understood by a person skilled in the art, in application of his ordinary knowledge.

Claims (9)

Alliage constitué de titane et d'au moins un autre matériau, contenant entre 50% et 99% de titane et entre 1% et 50% de l'autre matériau, caractérisé en ce que l'autre matériau est un des métaux précieux.An alloy consisting of titanium and at least one other material, containing between 50% and 99% titanium and between 1% and 50% of the other material, characterized in that the other material is a precious metal. Alliage selon la revendication 1, caractérisé en ce que le métal précieux est l'un quelconque entre l'or, l'argent, le platine ou le palladium.An alloy according to claim 1, characterized in that the precious metal is any one between gold, silver, platinum or palladium. Alliage selon les revendications 1 ou 2, caractérisé en ce que l'alliage contient uniquement le titane et un seul métal précieux, sous réserve d'impuretés inévitables.An alloy according to claims 1 or 2, characterized in that the alloy contains only titanium and a single precious metal, subject to unavoidable impurities. Alliage selon l'une quelconque des revendications précédentes, caractérisé en ce que l'alliage contient entre 5% et 15%, de préférence 10% du métal précieux.An alloy according to any one of the preceding claims, characterized in that the alloy contains between 5% and 15%, preferably 10% of the precious metal. Procédé pour la fabrication de l'alliage selon l'une quelconque des revendications précédentes, caractérisé en ce que le titane et le métal précieux sont alliés sous atmosphère et/ou sous pression contrôlées.Process for the manufacture of the alloy according to any one of the preceding claims, characterized in that the titanium and the precious metal are alloyed under controlled atmosphere and / or under pressure. Procédé pour la fabrication de l'alliage selon la revendication 5, dans lequel le titane et le métal précieux sont alliés sous une atmosphère neutre exempte d'oxygène.The process for producing the alloy of claim 5, wherein the titanium and the precious metal are alloyed under a neutral oxygen-free atmosphere. Procédé pour la fabrication de l'alliage selon la revendication 5 ou 6, dans lequel le titane et le métal précieux sont fondus et alliés par décharge électrique dans une enceinte une fois que l'oxygène est éliminé ou remplacé par un gaz neutre.A process for producing the alloy of claim 5 or 6, wherein the titanium and the precious metal are melted and alloyed by electrical discharge into an enclosure once the oxygen is removed or replaced by a neutral gas. Pièce d'horlogerie, bijouterie et/ou de joaillerie, caractérisée en ce qu'elle est fabriquée en un alliage selon l'une quelconque des revendications 1 à 7.Timepiece, jewelery and / or jewelery, characterized in that it is made of an alloy according to any one of claims 1 to 7. Pièce selon la revendication 8, caractérisée en ce qu'il s'agit d'un boîtier de montre.Part according to claim 8, characterized in that it is a watch case.
EP12175562A 2011-07-08 2012-07-09 Refined titanium alloy Withdrawn EP2548982A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3067755A1 (en) * 2015-03-12 2016-09-14 Ynsendia AG Barrel for a timepiece

Citations (3)

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Publication number Priority date Publication date Assignee Title
GB733882A (en) * 1952-03-08 1955-07-20 Brevets D Etudes Et De Rech S An alloy of which the base metal is titanium
US4568398A (en) * 1984-04-06 1986-02-04 National Research Development Corp. Titanium alloys
WO2008018109A1 (en) * 2006-08-11 2008-02-14 Consiglio Nazionale Delle Ricerche Precious metal alloys based on the nitiau system, with phase transformations in solid state and methods for the production and transformation thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB733882A (en) * 1952-03-08 1955-07-20 Brevets D Etudes Et De Rech S An alloy of which the base metal is titanium
US4568398A (en) * 1984-04-06 1986-02-04 National Research Development Corp. Titanium alloys
WO2008018109A1 (en) * 2006-08-11 2008-02-14 Consiglio Nazionale Delle Ricerche Precious metal alloys based on the nitiau system, with phase transformations in solid state and methods for the production and transformation thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KEUN-TAEK OH ET AL: "Cytocompatibility and electrochemical properties of Ti-Au alloys for biomedical applications", JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B: APPLIED BIOMATERIALS, vol. 83B, no. 2, 1 November 2007 (2007-11-01), pages 320 - 326, XP055047686, ISSN: 1552-4973, DOI: 10.1002/jbm.b.30798 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3067755A1 (en) * 2015-03-12 2016-09-14 Ynsendia AG Barrel for a timepiece

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