METHOD OF MANUFACTURING RARE-EARTH MAGNETS

摘要

A method of manufacturing rare-earth magnets includes, a first step of producing a compact C by subjecting a sintered body S, which is formed of a RE-Fe-B main phase MP having a nanocrystalline structure (where RE is at least one of neodymium and praseodymium) and a grain boundary phase BP of an RE-X alloy (where X is a metal element) located around the main phase, to hot plastic processing that imparts anisotropy; and a second step of producing a rare-earth magnet RM by melting a RE-Y-Z alloy which increases the coercive force of the compact C (where Y is a transition metal element, and Z is a heavy rare-earth element), together with the grain boundary phase BP, and liquid-phase infiltrating the RE-Y-Z alloy melt from a surface of the compact C.