冲击加载石灰岩形变的X射线分析

X-RAY DIFFRACTION STUDIES ON LIMESTONE AFTER SHOCK LOADING

我们使用炸药透镜对石灰岩样品实施冲击加载,冲击加载的压力分别为:9.9、14.0、23.0 GPa。把回收的样品用Y-2型X射线衍射仪进行分析,衍射分析选择2θ=28°30～30°之间的方解石(104)特征反射面衍射峰 其结果表明冲击峰压值与方解石(104)特征反射面衍射光的特征间具有密切关系。方解石(104)特征反射面衍射峰的形变对冲击峰压的响应是敏感的,X射线技术对受冲击方解石(石灰岩)形变的分析是一个行之有效的手段。

Limestone samples were explosively shocked up to 9.9,14.0 and 23.0 GPa recovered respectively and the recovered samples were analysed with Y-2 type X-ray diffractometer. The calcite (104) characteristic reflection plane was chosen for analysis while 29 = 28°30'-30°.The results show that there is a close relationship between the shock pressure and the characteristics of the diffraction pattern of the X-rays.The deformation of calcite (104)character-istic reflection plane is sensitvely related to shock pressure.It indicates that X-ray technique is an effective means for analysing the deformationof shocked calcite (limestone).