IDENTIFICATION OF Mo SINGLE CRYSTAL AND TEST OF THE DEVIATION ANGLE
LEI Xin-ying, GUO Rang-min, LI Zhong-kui, ZHENG Xin, ZHANG Ting-jie (Northwest Institute for Nonferrous Metal Research, Xi′an 710016, China)
A sample of Mo single crystal has been identified, and the orientation deviation angle of (111) plane has been measured. Low angle grain boundaries in the sample were observed and analyzed by means of rotating orientation XRD and optical microscopy. The low angle grain boundary may end in a Mo Single Crystal, the contrast of its two sides can not be distinguished with optical microscopy. I-θ curve of a Mo Single Crystal has two standard peaks and the widths of peaks are all narrower, which means the orientation deviation angle between the two side of low angle grain boundary is very small. Orientation deviation angle of the sample is 7.6°. It is found that simple method is suitable for identifying Mo single crystal, and the result of deviation angle is accurate.