本文利用高分辨电镜（ＨＲＥＭ）对两种不同方法制备的纳米固体材料的微观结构进行了研究．结果表明，在惰性气体凝聚加原位加压法制备的纳米固体Ｐｄ中，晶界上既有有序的区域，同时又存在局部不完整或无序的区域以及纳米级的空洞，而且晶粒内部及晶界区存在大量的缺陷．在非晶晶化制备的Ｔｉ－Ｎｉ－Ｓｉ和Ｆｅ－Ｍｏ－Ｓｉ－Ｂ纳米合金中，晶界基本上为有序结构，没有明显的无序区或纳米空洞存在，缺陷的密度也较低．在两种不同方法制备的纳米固体中，晶界都呈现出弯曲的特征，而且邻近晶界的区域存在点阵畸变．
The grain boundaries in nanocrystalline palladium synthesized by the inert gas condensation and in situ compacting method have ordered and imperfect or disordered regions. Nanovoids are also observed at the interfaces. High density of dislocations are detected inside the grains and at the grain boundaries. Most of the interfaces in nanocrystalline Ti-Ni-Si and Fe-Mo-Si-B alloys produced by the amorphous crystallization have ordered structure. No obvious disordered regions and nanovoids are observed at the interfaces. However, the lattice fringes near the ordered grain boundaries or interfaces regions in the nanocrystalline materials produced by the various process show curved and a little distorted appearance. In comparison with the nanocrystalline palladium, the nanocrystalline alloys obtained from the amorphous crystallization have much lower density of dislocations.Correspondent:PING Dehai,(Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015)
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