Patent ID: 6053995
Filing Date: 2000-04-25
Classification: C01B,C22C,C22F,H01M,Y02E,Y02P,Y10S

Abstract:
A method of producing an age precipitation-containing rare earth metal-nickel alloy of AB.sub.5 structure having a composition represented by a formula (1)R(Ni.sub.1-x M.sub.x).sub.5+y ( 1)wherein R stands for a rare earth element including Y or mixtures thereof, M stands for Co, Al, Mn, Fe, Cu, Zr, Ti, Mo, W, B, or mixtures thereof, x satisfies the relation of 0.05.ltoreq.x.ltoreq.0.5, and y satisfies the relation of -0.45.ltoreq.y.ltoreq.0.45, said alloy containing a precipitated phase having an average size of 0.1 to 20 .mu.m as measured along a longitudinal axis , said method comprising the steps ofsubjecting a raw alloy material having a composition represented by the formula (1) to a solid solution treatment at a temperature of not less than 1000.degree. C., andageing the alloy material subjected to said solid solution treatment at a temperature T, in .degree. C., of not less than 700.degree. C. and less than 1000.degree. C. for a time period t, in hours, which satisfies the relation represented by the formula (2)(830-T)/200.ltoreq.logt.ltoreq.(1200-T)/200 (2)thereby precipitating a precipitated phase having an average size of 0.1 to 20 .mu.m as measured along a longitudinal axis.