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.
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