Patent ID: 7217388
Filing Date: 2007-05-15
Classification: B22F,C03B,C22C

Abstract:
1. In a method for producing a strengthened platinum material, wherein the method includes degassing a platinum alloy powder in a vacuum atmosphere at a temperature of at least 1200° C., the improvement comprising: preventing blisters from occurring on a surface of the strengthened platinum material and preventing unwanted increase in particle size of the platinum alloy powder by eliminating gas from a wet-milled platinum alloy fine particle size powder by degassing the powder at a temperature of 1200 to 1400° C., wherein the degassing step is conducted after the steps of forming a platinum alloy powder by melt-spray, oxidizing the platinum alloy powder and wet-milling the oxidized platinum alloy powder in an organic solvent, and wherein the degassed wet-milled platinum alloy powder is sintered in an inert gas atmosphere at a temperature of 1400 to 1700° C. and then forged