Patent ID: 7981190
Filing Date: 2011-07-19
Classification: B22F,B82Y

Abstract:
1. A process for producing ultrafine alloy particles comprising an alloy including a primary metal and a subsidiary metal, comprising steps of: introducing powder materials for producing said ultrafine alloy particles into a thermal plasma flame under reduced pressure to form a vapor-phase mixture, said powder materials including said primary metal and said subsidiary metal solid-soluble in said primary metal and a content of said subsidiary metal being in a range of 1 wt % to 25 wt %, wherein said primary metal is selected from a group consisting of iron, cobalt and nickel, and said subsidiary metal is aluminum; and introducing cool gas toward an end portion of said thermal plasma flame in a supply amount sufficient for quenching said vapor-phase mixture so as to generate said ultrafine alloy particles capable of inhibiting coalescence or oxidation, or both, of said ultrafine alloy particles including said primary metal.