摘要
莫来石陶瓷中的位错对其力学性能有着重要的影响,因此测定表征其特征的Burgers矢量具有重要的意义。莫来石属正交晶系,弹性各向异性,不能用通常的g·b=0判据来测定其位错的Burgers矢量。本文利用电子计算机图像匹配的方法,结合电子显微技术,对莫来石陶瓷中位错的Burgers矢量进行了测定。结果表明,莫来石陶瓷中存在Burgers矢量为<110>型的位错。
Dislocation has essential effects on the mechanical properties of mullite ceramics, so that it is very important to determin the Burgers vector of dislocation. Mullite belongs to the orthogonal crystal system and is of anisotopic clasticity, therefore the Burgers vector of its dislocation can not be determined by g·b=0 criterion. In this paper, the Burger Vector of dislocation has been determined through the technique of image matching. The results show that there exist dislocations with Burgers Vector<110>type.
关键词
莫来石
耐火材料
陶瓷
位错
mullite refractories
ceramics
dislocations
burgers vector
image matching
