US 6,280,536 B1 · Fe based hard magnetic alloy having super-cooled liquid region

Abstract

The present invention provides a Fe based hard magnetic alloy having a very wide temperature interval in the super-cooled liquid region, having a hard magnetism at room temperature, being able to be produced thicker than amorphous alloy thin films obtained by conventional liquid quenching methods, and having a high material strength, wherein the Fe based hard magnetic alloy comprises Fe as a major component and containing one or a plurality of elements R selected from rare earth elements, one or a plurality of elements M selected from Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W and Cu, and B, the temperature interval Δ Tx in the super-cooled liquid region represented by the formula of Δ Tx=Tx−Tg (wherein Tx and Tg denote a crystallization initiation temperature and glass transition temperature, respectively) being 20° C. or more.

Claims7

Dependent claims

A Fe based hard magnetic alloy comprising Fe as a major component and containing one or a plurality of elements R selected from rare earth elements, one or a plurality of elements M selected from Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, and Cu, and B, and represented by the following formula:

Fe100−x−y−z−w−tRxMyTzBwLt
wherein T is one or a plurality of elements selected from Co and Ni, with x, y, z, w and t being in ranges of 2≦x≦15, 2≦y≦20, 0≦z≦20, and 10≦w≦30 and 0≦t≦5 in atomic percentages, respectively, and the element L is one or a plurality of elements selected from Ru, Rh, Pd, Os, Ir, Pt, Al, Si, Ge, Ga, Sn, C, and P,
wherein a crystalline phase comprising one or two of α-Fe phase and Fe3B phase and a crystalline phase comprising Nd2Fe14B are precipitated in said Fe based hard magnetic alloy.

Dependencies are inferred from the claim text.

Fe based hard magnetic alloy having super-cooled liquid region

Life of this patent

Fe based hard magnetic alloy having super-cooled liquid region

Life of this patent

Abstract

Claims7