R-T-B-Ga-BASED MAGNET MATERIAL ALLOY AND METHOD FOR PRODUCING SAME

摘要

An R-T-B-Ga-based magnet material alloy (provided that R is at least one type of rare-earth element including Y, and T at least one type of transition element requiring Fe), wherein the alloy comprises a R2T14B phase (3) being the main phase and R-rich phases (1 and 2) in which R is concentrated, and by making the Ga content ratio (% by mass) of a non-crystal phase (1) within the R-rich phase higher than the Ga content ratio (% by mass) of a crystal phase (2) within the R-rich phase, the magnetic property of a rare-earth magnet used as a material is able to be improved and magnetic property variance is reduced. An average thickness of the R-T-B-Ga-based magnet material alloy no less than 0.1mm and no greater than 1.0mm is preferable in order to minimize formation of chill crystals and alpha-Fe crystallization.