研究了氢对Nd-Dy-Fe-B磁体制作过程的影响,主要包括氢对HD磁粉的氧化和对其后烧结磁体磁性能的影响.研究表明,氢不利于HD磁粉的氧化稳定性能,氢的存在促进磁粉吸湿和电化学腐蚀,加快氧的扩散.HD磁粉经过在一定温度下真空脱气处理后,氧化稳定性提高,特别是在较高温度下进行脱气处理的磁粉.氢的存在使磁粉容易粉碎,加快磁体的烧结过程,降低磁体的烧结温度.同时发现,未脱氢磁体的取向度较低.
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