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研究了双层辉光离子W Mo共渗快冷后的表面形貌 ,发现表面有大量微沟存在 ,且微沟内的W Mo含量低于平均表面含量。用XPS所测的表面成分与扫描能谱所测的基本一致 ,说明最表层和次表层的合金含量相同 ,而非通常认为的在表面存在几个原子厚的高浓度层。XPS的结果表明 ,表面的Fe、W、Mo均以原子状态存在 ,而非化合物层。W Mo共渗缓慢冷却后 ,晶内和晶界析出金属间化合物Fe7(WMo) 6 ,并沿晶界向表面“溢出”
The surface morphology of the double glow-tungsten W Mo co-infiltration was investigated. It was found that there were a large number of microgrooves on the surface, and the W Mo content in the microgrooves was lower than the average surface content. The surface composition measured by XPS is basically the same as that measured by the scanning energy spectrum, indicating that the alloy contents of the outermost surface layer and the subsurface layer are the same, rather than the high atomic layer thickness of several atoms on the surface. The XPS results show that the surface of Fe, W, Mo exist in atomic state, rather than the compound layer. W Mo co-infiltration slow cooling, the intragranular and grain boundary precipitation of intermetallic compound Fe7 (WMo) 6, and along the grain boundary to the surface “overflow”