纯三元及含Zr,Ga元素磁粉的各向异性

Anisotropy of ternary and( Zr,Ga) addition magnetic powders

未经均匀化热处理的纯三元及含Zr,Ga元素的SC合金铸片经优化的HDDR工艺处理都可以制备各向异性Nd Fe B磁粉.这表明:元素的添加及SC铸片是否进行了均匀化热处理都不是HDDR磁粉各向异性形成的必要条件.磁粉各向异性形成的关键因素在于HDDR工艺的调节,即适当地加快歧化反应过程,减缓脱氢再结合过程以及控制脱氢再结合时的合适氢气压强均有利于磁粉各向异性的形成.本文将为制备低成本高各向异性磁粉提供重要的指导.

Both non- homogenization treatment Zr,Ga addition and ternary Strip Casting（ SC） alloy flakes can be used to prepare anisotropy hydrogenation,disproportionation,desorption,and recombination（ HDDR） NdFe B magnetic powders. This illustrates that anisotropy formation of magnetic powders does not necessarily depend on element addition or homogenization heat treatment of SC flakes. But the HDDR process procedure also plays an important role in anisotropy inducement. Highly anisotropic magnetic powders are attributed to rapid disproportionation reaction course,slow desorption- recombination reaction course,and optimum recombination hydrogen pressure in the HDDR procedure process. This paper will provide an important guidance for preparing highly anisotropic magnetic powders with low cost.