中文摘要：

研究了Nd10．5Pr2.5Fe80Nb1B6非晶快淬薄带在943，973和1003K等温晶化与薄带组织和矫顽力的关系。结果表明，d10．5Pr2.5Fe80Nb1B6快淬薄带在943K等温晶化所需晶化孕育时间为12min，973K时为5min，而1003K时不足5min。d10．5Pr2.5Fe80Nb1B66在1003K晶化25min后所得的（Nd，Pr）2Fe14B平均晶粒尺寸为163nm，添加Nh显著延缓了Nd10.5Pr2.5Fe80Nb1B6快淬薄带晶化后的晶粒尺寸长大。加Nb，Pr能有效提高Nd10．5Fe80Nb1B6的矫顽力。在973K晶化处理19min时得到平均晶粒尺寸为96nm的（Nd，Pr）2Fe14B单相组织，其最大矫顽力为1616kA·m^-1。

英文摘要：

The relationship between microstructures and coercivities of Nd10.5Pr2. 5Fe80NbB6 meh-spun ribbons, after isothermal crystallization processes at 943, 973 and 1003 K, was studied. The results showed that the crystallization in cubation duration was 12, 5 and less than 5 min at 943, 973 and The average grain size of （Nd, 1003 K respectively. Pr）2Fe14B was 163nm, ＇after at 1003 K for 25 min, growth of （Nd, Pr）2Fe14B grains. Nb and Pr increased the intrinsic magnets. The best coercive force, obtained after crystallizing at 973 its average grain size was 96 nm. for Nb retarded the The combination of coercive force of the 1616 kA·m^-1, was K for 19 min, and