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爆炸压结Nd-Fe-B永磁体微观结构 预览 被引量:2
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作者 敖琪 刘薇 吴建生 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2005年第10期 1613-1616,共4页
利用透射电镜、X射线衍射仪、X射线能谱仪,对爆炸压结Nd-Fe-B永磁合金进行微观组织结构的观察和分析.结果表明:爆炸压结Nd-Fe-B的组织主要由基体Nd2Fe14B相、富O相和富Nd相组成;基体相是硬磁相,四方晶体结构,其晶格常数为a=0.88 nm和c=1... 利用透射电镜、X射线衍射仪、X射线能谱仪,对爆炸压结Nd-Fe-B永磁合金进行微观组织结构的观察和分析.结果表明:爆炸压结Nd-Fe-B的组织主要由基体Nd2Fe14B相、富O相和富Nd相组成;基体相是硬磁相,四方晶体结构,其晶格常数为a=0.88 nm和c=1.22 nm;富O相形貌呈三角状或层状,分布在3个晶粒交隅处和两个晶粒交界处,其晶体结构均为面心立方(fcc),点阵常数a=0.559 nm;富Nd相呈不同块状形貌,镶嵌在基体内或晶界上,其晶体结构为密排六方(hcp),晶格常数a=0.395 nm和c=0.628 nm;在富O相中O,Nd和Fe的含量(原子分数,下同)分别为45%~60%,20%~40%和10%~12%,块状富Nd相中则为80%~85%Nd和10%~15%O,同时还发现晶界相中分布着少量的位错. 展开更多
关键词 ND-FE-B 爆炸压结 微观结构 晶界相
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Microstructure of explosively compacted Nd-Fe-B magnet by TEM 预览
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作者 敖琪 刘薇 +1 位作者 曹力军 吴建生 《中国有色金属学会会刊:英文版》 CSCD 2005年第2期 468-472,共5页
The microstructure of an explosively compacted Nd-Fe-B permanent magnet(Nd-Fe-B) was investigated by means of TEM and XRD. It is shown that there are three kinds of phases: Nd2 Fe14 B matrix phase, O-rich phases and N... The microstructure of an explosively compacted Nd-Fe-B permanent magnet(Nd-Fe-B) was investigated by means of TEM and XRD. It is shown that there are three kinds of phases: Nd2 Fe14 B matrix phase, O-rich phases and Nd-rich phase with different structures and compositions in the magnet. The hard magnetic phase Nd2 Fe14 B is tetragonal, which lattice parameters are determined to be a=0. 88 nm and c= 1.22 nm. The O-rich phase locates at the grain boundaries and the triple junctions has fcc structure whose lattice parameter is a=0. 559 nm. A dislocation is observed in this phase. It is also found that a large number of the block-shaped Nd-rich phases with hcp structure are embedded in the Nd2 Fe14B matrix or at grain boundary. Their lattice parameters are determined to be a=0. 395 nm and c=0.628 nm. 展开更多
关键词 边界相 微结构 钕-铁-硼永磁材料 爆炸压实工艺
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