| 摘要 |
PURPOSE:To economically and easily obtain a rare earth element-transition metal-semimetal magnet with improved characteristics by causing main material to be alpha-iron or solid solution of cobalt in alpha-iron and rare earth hydride, and heat treating an alloy consisting of mixed texture whose grain size is not larger than 1mu. CONSTITUTION:When a rare earth element R and an alloy, whose main material is alpha-iron or alpha-iron and cobalt, are caused to occlude hydrogen, a material consisting of mixed texture whose main material is alpha-iron or solid solution of cobalt in alpha-iron and rare earth hydride, and whose grain size is not larger than 1mu, is formed. When the mixed texture in this form is caused to be starting raw material and dehydrogenation is effected while heat treatment is carried out, fine grains of R-Fe crystal not larger than 1mu are deposited. Thus an R-Fe magnet with high coercive force and stable characteristics can be obtain without requiring sintering and quenching. |
