材料期刊网

本文用会聚束电子衍射对纯AI中小角度晶界和亚晶界两侧晶体的取向差进行了精确的测定.定量计算结果:AI中小角度晶界的取向差为1.55°±0.051°.亚晶界的取向差为0.32°±0.037°.并对单个刃位错产生的错向角进行了测量,结果是:0.22°±0.036°.同时对该方法的精度与误差进行了分析。最后对小角度晶界和亚晶界的位错网络结构、晶界类型等问题进行了探讨.

A method has been advanced to determine precisely the orientation difference of the crystals between low-angle boundaries and sub-boundaries of high purity Al by convergent beam electron diffraction studies. The results show that the ones of low-angle and sub-boundaries are 1.55±0.051° and 0.32+0.037° respectively, as well as the curved angle of the crystal by single edge dislocation is 0.22±0.036°. The accuracy and error of the method have been analysed. Some problems concerning their structure of dislocation network and type were also discussed.