摘要
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．
Formation of microstructure for Nd3.6Pr5.4Fe83Co3B5 nanocrystalline alloys at differ- ent speed of rapid quenching was studied. The X-ray diffractometry(XRD) 、 transmisshon electron microscopy(TEM) and vibrating sample magnetometer(VSM) were performed in order to investigate the microstructure and the magnetic properties. When the wheel circumferential speeds is 20m/s,the crystal size of the alloys is uniform and petty The average grain size of the Nd2Fe14B phase is 14nm and the grain size of the α-Fe phase with volume fraction of 48.6% is 16nm. And the op- timal magnetic properties obtained for Nd3.6Pr5.4Fe83Co3B5 alloys are Jr=1.108T, Hc=446.5kA/m, (BH)max=193.6kJ/m3, Jr/Js=0.736.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2001年第6期615-618,共4页
Chinese Journal of Materials Research
基金
国家自然科学基金资助项目19974035
河北自然科学基金资助项目599240.
