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利用电镜观察材料的微观组织,所遇到的最关键的问题是如何快速的制得好的样品。在研究金属材料中第二相粒子的分布、形貌、大小时,往往采用“碳萃取复型”的方法。该方法的特点是能将第二柑萃取下来在电镜下进行直接观察,由于是直接观察复型上的实物,因之效果较好。 然而,常用的萃取复型方法,制样周期长,不易掌握,其关键在于脱膜方法较复杂。为此,我们在实践中摸索出一种新的脱膜法——浸蚀法。即,将喷好碳的金相样品,用手术刀(或刀片)将其划成2mm~2的小方格,然后用摄子夹住放到5％硝酸酒精溶液中浸蚀1～2
Using electron microscopy to observe the microstructure of a material, the most critical problem encountered is how to make a good sample quickly. In the study of metal materials, the distribution of second phase particles, morphology, size, often using “carbon extraction complex” approach. The method is characterized by the extraction of the second citrus can be directly observed under the electron microscope, as is the direct observation of complex physical, so the effect is better. However, the commonly used extraction complex method, the sample preparation period is long, not easy to grasp, the key lies in the more complex method of stripping. For this reason, we have found out in practice a new method of stripping - etching. That is, the sample is sprayed on the carbon-rich metallographic, with a scalpel (or blade) will be divided into small squares 2mm ~ 2, and then photographed placed in 5% nitric acid solution etching 1 ~ 2