添加元素对Nd-Fe-BHDDR磁粉各向异性及氢化工艺的影响

The Effect of Some Addition on the Magnetic Anisotropy of Nd Fe B HDDR Powders and HDDR Technology

Ｎｄ－Ｆｅ－Ｂ磁粉的各向异性是当前日益引人关注的一个问题，对Ｎｄ－Ｆｅ－Ｂ磁粉各向异性形硬化机制，本文对Ｎｄ－Ｆｅ－Ｂ－Ｃｏ－Ｍ（Ｍ＝Ｇａ，Ｎｂ）系进行了较为系统的研究，发现磁粉的Ｂｒ∥（平行于成形磁场方向）比Ｂｒ⊥（垂直于成形磁场方向）大了近１倍，说明Ｎｄ－Ｆｅ－Ｂ－Ｃｏ－Ｍ系的ＨＤＤＲ磁粉具有较强的各向异性，进一步的研究发现添加Ｇａ有助于提高ＨＤＤＲ磁粉的各向异性，此外本文还就添加元素对ＨＤＤＲ工艺条件的影响进行了研究，最后本文对ＨＤＤＲ法制备的Ｎｄ－Ｆｅ－Ｂ磁粉磁各向异性的形成机理进行了初步探讨。

The properties of Nd Fe B Co M (M=Ga,Nb) HDDR powders are studied systematically. The results show that the anisotropy of these powders can be in creased by adding Ga, and the best disproportion ationtemperature of Nd Fe B Co Ga is higher than that of Nd Fe B Co.