中文摘要：

对机械力驱动下Nd16Fe76B8合金的氢化-歧化反应机理进行了研究。通过测量球磨过程中合金的吸氢量变化,揭示了其氢化-歧化反应动力学特征。采用X射线衍射（XRD）、透射电镜（TEM）、扫描电镜（SEM）等方法,研究了球磨过程中合金的组织演变。结果表明：在球磨的最初阶段,合金只发生氢化反应,生成NdH2.7与Nd2Fe14BHy相,此后随着球磨时间的延长,氢化态合金粉末在机械球磨的作用下被激活至高能状态,并逐渐发生歧化,最终得到晶粒尺寸约10nm的NdH2.7、Fe2B、α-Fe的纳米歧化组织。

英文摘要：

The mechanism of mechanically activated hydrogenation-disproportionation reaction of Nd16Fe76B8 alloy was investigated.The aspects of the kinetics for the mechanically activated hydrogenation-disproportionation were studied by measuring the hydrogen absorption of the alloy during milling,and the phase and microstructure change was characterized by X-ray diffraction（XRD）,transmission electron microscopy（TEM）,and scanning electron microscopy（SEM）,respectively.The results show that,firstly,the Nd-rich phase and Nd2Fe14B matrix phase in the Nd16Fe76B8 alloy is hydrogenated into NdH2.7 and Nd2Fe14BHy.After that,the alloy powder is activated by further milling in hydrogen,and then disproportionated into α-Fe,NdH2.7 and Fe2B phases,with a grain size of about 10 nm.