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研究了使用不同快淬速度制备的Ｎｄ３．６Ｐｒ５．４Ｆｅ８３Ｃｏ３Ｂ５合金中Ｎｄ２Ｆｅ１４Ｂ／α－Ｆｅ复合纳米晶结构的形成．采用Ｘ射线（ＸＲＤ）、透射显微（ＴＥＭ）分析技术和振动样品磁强计（ＶＳＭ）观测和测量了材料的微结构和磁性．结果表明，使用最佳淬速（２０ｍ／ｓ）形成的Ｎｄ２Ｆｅ１４Ｂ／α－Ｆｅ复合纳米晶结构晶粒细小，晶粒尺寸均匀．Ｎｄ２Ｆｅ１４Ｂ相和α－Ｆｅ相的平均晶粒尺寸分别为１４ｎｍ、１６ｎｍ．合金中α－Ｆｅ相的体积分数为４８．６％．纳米晶合金的磁性能为Ｊｒ＝１．１０８Ｔ，Ｈｃ＝４４６．５ｋＡ／ｍ；（ＢＨ）ｍａｘ＝１９３．６ｋＪ／ｍ３；剩磁比Ｊｒ／Ｊｓ＝０．７３６．
The formation of Nd2Fe14B / α-Fe composite nanocrystalline structure in Nd3.6Pr5.4Fe83Co3B5 alloy prepared by using different quenching speeds was studied. The microstructure and magnetic properties of the materials were observed and measured by X-ray diffraction (XRD), transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM). The results show that the Nd2Fe14B / α-Fe composite nanocrystalline structure with the best quenching speed (20m / s) has fine grain size and uniform grain size. The average grain sizes of the Nd2Fe14B phase and the α-Fe phase were 14 nm and 16 nm, respectively. The volume fraction of α-Fe phase in the alloy is 48.6%. The magnetic properties of nanocrystalline alloy Jr = 1.108T, Hc = 446.5kA / m; (BH) max = 193.6kJ / m3; remanence Jr / Js = 0.736.