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本文提出了一种分析单晶体Laue照相和电子衍射谱的新方法,即旋转倒易坐标系法。它是在心射投影的基础上利用电子计算机旋转倒易坐标系,以标定衍射斑点和确定单晶取向。基于这个原理编排了计算机程序(采用BASIC语言),并用来进行了以下四方面工作:(1)标注了若干立方、六方、正方、菱方和斜方等晶体的Laue照片,同时求出晶体取向、滑移面或孪生面指数,以及切割给定取向的晶体所需的转角等。(2)标注了若干未知晶体的Laue照片。进而确定了未知晶体(X射线晶体化学分析)。(3)标定了若干立方、六方和斜方晶体的电子衍射谱,鉴定了若干未知晶体,并求得了孪晶和基体的取向关系。(4)利用计算机自动绘制了若干极射和心射标准投影,模拟绘制了各类晶体的Laue照片和电子衍射谱,同时还作出了冷轧铝板的{111}极图。旋转倒易坐标系法的主要优点是普遍、可靠、迅速、准确和高度自动化。在此基础上有可能发展为能同时记录和分析衍射谱、自动鉴别晶体和自动切割晶体的全自动晶体分析方法,以取代目前的Laue照相法。
In this paper, we propose a new method for the analysis of single-crystal Laue photographic and electron diffraction spectra, namely, the rotation reciprocal coordinate method. It is based on the projection of the heart on the basis of the use of electronic computer rotation reciprocal coordinate system to calibrate the diffraction spots and determine the orientation of single crystal. Based on this principle, a computer program (using BASIC language) is arranged and used in the following four aspects: (1) Laue photographs of several cubic, hexagonal, square, rhombohedral and rhomboidal crystals, and the crystal orientation , Slip plane or twin plane index, and the angle required to cut a crystal for a given orientation. (2) Laue photographs with some unknown crystals. In turn, unknown crystals were identified (X-ray crystallography). (3) The electronic diffraction spectra of several cubic, hexagonal and orthorhombic crystals were calibrated, some unknown crystals were identified, and the orientation relationship between twins and matrix was obtained. (4) Using the computer to automatically draw a number of polar and cardiac projection standard projection of various types of crystal Laue photos and electron diffraction spectra, but also made {111} pole figure cold-rolled aluminum. The main advantages of rotating reciprocal coordinate methods are universal, reliable, fast, accurate and highly automated. Based on this, it is possible to develop a fully automatic crystal analysis method capable of simultaneously recording and analyzing diffraction spectra, automatically identifying crystals, and automatically cutting crystals to replace the current Laue photography method.