Title:
METHOD FOR PRODUCING COMPOSITE MATERIALS BASED ON PLATINUM OR ON PLATINUM-RHODIUM ALLOYS
Document Type and Number:
WIPO Patent Application WO/2015/034387
Kind Code:
A8
Abstract:
The invention relates to the field of noble metal metallurgy, and specifically to the production of platinum or of platinum-rhodium alloys, reinforced using dispersed oxide particles. Such composite materials are widely utilized in preparing glass melting apparatuses and bushing assemblies used in harsh, high-temperature environments. The problem which the proposed technical solution aims to solve consists in shortening the operational duration of the prolonged oxidative annealing of a powder which is produced by electro-physically dispersing a zirconium-doped alloy, and also in increasing the level of degassing of semi-finished products which are produced by compressing the powder and are subsequently used in preparing glass melting apparatuses and bushing assemblies. The technical result is achieved in that the electro-physical dispersion of platinum or of a platinum-rhodium alloy, which is doped with a zirconium additive, is carried out in a distilled water environment which is sparged using an oxygen-containing gas mixture containing 20-50 percent by volume of oxygen, and in that the sintering of briquettes produced by compressing the powder is carried out in a vacuum at a temperature of 1200-1600C over a period of 2-4 hours. The essence of the proposed technical solution consists in that the electro-physical dispersion of platinum-based zirconium-containing alloys in a distilled water environment while sparging same using an oxygen-containing gas mixture containing 20-50 percent by volume of oxygen, is accompanied by a more thorough oxidation of the zirconium than in the prototype method, thus simplifying the subsequent oxidative annealing process, and decreasing the duration and energy-consumption thereof, while the sintering of briquettes, produced from the powder, in a vacuum at a temperature of 1200-1600C over a period of 2-4 hours, allows for the desorption of absorbed gases and the removal thereof from the composite materials. An example is given regarding producing a composite material based on a 90-10 platinum-rhodium (PtRh) alloy which is stabilized using zirconium oxide.
Inventors:
EFIMOV WALERIY NIKOLAEVICH (RU)
GOREVAYA OLGA NIKOLAEVNA (RU)
PAVLOV EVGENIY ALEKSANDROVICH (RU)
KHORIKOV PAVEL ALEKSANDROVICH (RU)
EL TSIN SERGEY IVANOVICH (RU)
GUSHCHINSKIY ANDREY ANATOL EVICH (RU)
GOREVAYA OLGA NIKOLAEVNA (RU)
PAVLOV EVGENIY ALEKSANDROVICH (RU)
KHORIKOV PAVEL ALEKSANDROVICH (RU)
EL TSIN SERGEY IVANOVICH (RU)
GUSHCHINSKIY ANDREY ANATOL EVICH (RU)
Application Number:
PCT/RU2013/000779
Publication Date:
May 26, 2016
Filing Date:
September 06, 2013
Export Citation:
Assignee:
OTKRYTOYE AKTSIONERNOYE OBSHCHESTVO KY ZD TSVETNYKH METALLOV IM V N GULIDOVA (RU)
International Classes:
C22C1/04; B22F1/00; B22F3/16; C22C5/04; C22C32/00
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