METHOD FOR PRODUCING COMPOSITE MATERIALS BASED ON PLATINUM OR ON PLATINUM-RHODIUM ALLOYS

摘要

A method includes melting of platinum or platinum-rhodium alloys doped with a zirconium additive, grinding of the resulting alloy to a fine powder by the electro-physical dispersion method, oxidative annealing of the powder, processing thereof into a compact material by the methods of powder metallurgy, and deformation-thermal treatment, wherein the electro-physical dispersion is carried out in a distilled water environment while sparging the same using an oxygen-containing gas mixture containing from 20 to 50% by volume of oxygen, and the sintering of briquettes is carried out in a vacuum at a temperature of 1200-1600° C. for 2-4 hours. It provides shortening operational duration of the prolonged oxidative annealing of a powder which is produced by electro-physically dispersing a zirconium-doped alloy, and also 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.

主权项

1. A method for producing composite materials based on platinum or on platinum-rhodium alloys comprising:
melting of platinum or platinum-rhodium alloys doped with a zirconium additive; grinding of the resulting alloy to a fine powder by the electro-physical dispersion method; oxidative annealing of the powder; processing thereof into a compact material by the methods of powder metallurgy; and deformation-thermal treatment; wherein the electro-physical dispersion is carried out in a distilled water environment while sparging the same using an oxygen-containing gas mixture containing from 20% to 50% by volume of oxygen, and the sintering of briquettes is carried out in a vacuum at a temperature of 1200° C.-1600° C. for 2-4 hours.