一种用于岩石材料微裂纹观察的复型技术

介绍了一种用于岩石材料微裂纹观察的复型技术。这种半透明的试样表面复型可有效复制宽度大于0.2μm的微观裂纹以及矿物颗粒的微结构特征，并可方便地用于光学显微镜和扫描电镜下观察。它的最大特点是不仅能精确复制岩样的表面裂纹，同时还能提供足够多的信息以鉴别矿物颗粒。应用表明：对于岩石材料的微破裂研究，特别对于矿物颗粒的破坏行为与岩石破坏的关系研究，它是一种方便而有效的方法。

REPLICA TECHNIQUE FOR MICROCRACK OBSERVATION OF ROCKS

A special surface replica technique for microcrack observation of rocks is introduced. The replica,which is hard,thick and semi-transparent,is convenient to be used for observation and analysis under optical microscope and SEM (Scanning Electron Microscope). By using this technique,cracks wider than 0.2 mm and the microstructural natures of minerals can be satisfactorily copied for the microscopical investigation. The noticeable characteristic of this replica attributes to its capacity of distinguishing the minerals on the rock surface. Application of this technique in the study on failure behavior of different minerals in granite shows that this is an effective and convenient method for the study of microcracking in rocks,especially for the study of cracking behaviors of different minerals and their relations with the failure of the rocks.