THIN STRIP MAGNET MATERIAL, MAGNET POWDER AND RARE EARTH BOND MAGNET

摘要

A thin strip magnet material (quenched thin strip (8)) obtained by jetting molten alloy (6) containing rare earth elements and transition metals from a nozzle (3) and allowing it to collide against the peripheral surface (53) of a cooling roll (5) for quenching, the constituting structure thereof being one where soft magnetic phases and hard magnetic phases exist adjacent to one another. The quenched thin strip (8) preferably satisfies the following expressions [1] and [2], and preferably satisfies one of the following expressions [3] and [4], assuming that average crystal particle sizes of a hard magnetic phase and soft magnetic phase in the vicinity of a roll surface (81) are respectively D1h and D1s, and those in the vicinity of a free surface (82) respectively D2h and D2s.