摘要
纳米颗粒复合材料的“内晶型”结构中，晶内纳米相和基体间存在的次界面对材料性能的改善有重要作用。本文系统观察了氧化铝陶瓷和Ａｌ２Ｏ３／ＳｉＣｎａｎｏ纳米复合材料的微结构，着重研究了弥散ＳｉＣ颗粒对Ａｌ２Ｏ３基体微结构的影响，讨论了“内晶型”结构、位错组态、纳米化效应和穿晶断裂之间的关系以及材料强韧化机理。
The second interface between the intragranular nano phase and matrix in the intragranuler structure of nanocomposites plays an important role in improving properties of materials. In present paper the microstructrue of the alumina ceramics and Al 2O 3/SiC nano nanocomposites were examined systematically by transmission electron microscope (TEM). The influence of the dispersed nano particles of SiC on microstructure of alumina matrix has been studied. The relationship between the “ intragranular structure”, dislocation configuration,“nanometerization effect” and the transgranular fracture, and the strength toughening mechanisms of nanocomposites were discussed.
出处
《电子显微学报》
CAS
CSCD
1998年第2期156-161,共6页
Journal of Chinese Electron Microscopy Society
基金
国家自然科学基金
山东省自然科学基金
关键词
纳米复合材料
微结构
位错组态
内晶型结构
nanocomposites\ microstructure\ dislocation configuration\ intragranular structure
