研究了HDDR工艺的吸氢歧化(HD)和脱氢再复合(DR)阶段在HDDR Nd13Fe80B7各向异性形成过程中的作用.结果发现: 短的吸氢歧化时间、高的脱氢温度和缓慢的脱氢处理均有助于Nd13Fe80B7材料获得各向异性; 当吸氢歧化时间过长时,HDDR Nd13Fe80B7成为各向同性的材料,即使高的脱氢温度和缓慢的脱氢处理也不能使它获得各向异性.这表明合适的吸氢歧化是HDDR Nd13Fe80B7各向异性形成的关键,而高的脱氢温度和缓慢的脱氢处理是HDDR NdFeB获得高各向异性的保证.使用XRD和TEM对Nd13Fe80B7材料吸氢歧化过程的观察表明,除NdH2、Fe和Fe2B外,没有发现其它相,HDDR Nd13Fe80B7各向异性的产生与条纹状的歧化组织相关.
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