NdFeB永磁合金单向柱晶的制备与特性  

PREPARATION AND PROPERTIES OF DIRECTIONAL COLUMNAR CRYSTAL IN NdFeB PERMANENT MAGNETIC ALLOY

作　　者：陈钟敏[1] 邹光荣[1] 史正兴[1] 傅恒志[1] 王乐仪[1] 

机构地区：[1]西北工业大学

出　　处：《材料科学进展》1990年第6期522-525,共4页

基　　金：国家自然科学基金;9589014

摘　　要：采用 LMC 定向凝固技术得到了 Nd_(17)Fe_(75)B_8合金单向柱晶,柱晶宽度为60—120μm,随抽拉速度增大而减小。分析发现,柱晶由 Nd_2Fe_(14)B 基体相初生枝晶定向生长而形成,Nd_2Fe_(14)B 的晶体学择优生长方向为[100],与其易磁化轴[001]垂直。Directional columnar crystal specimens of NdFeB alloy have been obtainedby LMC directional solidification technique.The width of columnar crystal is 60—120μm,which decreases with increase of the drawing velocity.It has been found that the columnarcrystal is resulted from the directional growth of the matrix Nd_2Fe_(14)B primary dendrite andthat the crystallographic preferential growth direction of Nd_2 Fe_(14)B is[100],Perpendicularto its easy magnetization axis[001].

关 键 词：NDFEB合金 实向凝固 制备 柱晶 

分 类 号：TM274[一般工业技术—材料科学与工程]