雾化NdFeB合金粉末的组织结构与磁性能  

MICROSTRUCTURE AND HARD MAGNETIC PROPERTIES OF ATOMIZED Nd-Fe-B ALLOY POWDER

作　　者：李清泉[1] 徐清洲 麻润海[1] 欧阳通[1] 田筱淑 

机构地区：[1]中国科学院力学研究所

出　　处：《粉末冶金技术》1995年第1期3-7,共5页Powder Metallurgy Technology

摘　　要：用８ＭＰａ的Ａｒ气雾化制取ＮｄＦｅＢ合金粉末，光学金相观察和Ｘ射线衍射分析表明，粉末主要由Ｎｄ２Ｆｅ１４Ｂ相组成。粉末具有一定的矫顽力，回火处理后矫顽力明显提高。不同粒度的粉末矫顽力存在差异，粉末越细其矫顽力越高。粉末初始磁化曲线与烧结ＮｄＦｅＢ磁体相似。Two alloys were atomized by 8. OMPa Argon gas. Optical microstructure observation and X-ray diffraction analysis authenticated that the obtained powder is mainly composed of a tetragonal Nd2Fe14B phase. The tHe value of the powder is relatively higher compared with that of the powder from pulverizing as-cast Nd-Fe-B alloy bulk,and gives rises after annealing at 973K for an hour, The iHc value varies with the rang of particle diameter, the more finer the powder particles are, the more higher the tHe value is. The initial magnetization behavion of the powder is analogous to that of conventional as-cast magnets.

关 键 词：气体雾化制粉 合金粉 磁学性能 显微组织 

分 类 号：TF123.112[冶金工程—粉末冶金]