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用常规XPS、小面积XPS和成象XPS研究了三维编织的C/SiC纤维复合材料.结果表明，在燃气中灼烧后材料表面生成的暗红色反应是由于层中的SiC已氧化成氧化硅,同时反应层中还引入了杂质Fe、Na、Ca和Al；在反应层下Si以元素Si、SiC和氧化硅多种形式存在.块材横截面的多点小面积XPS分析结果表明，元素硅的相对浓度随深度增加而减少, SiC的相对浓度则随深度增加而增加.块材横截面的成象XPS分析清楚地显示了SiC 在纤维束边界间呈大致均匀的分布,在块材两边元素Si的浓度明显偏高.根据XPS象的线性扫描结果估计了纤维束、束间SiC层和块材边缘元素Si富集层的厚度.
The three-dimensional braided C / SiC fiber composites were investigated by conventional XPS, small area XPS and image XPS.The results showed that the dark red reaction on the surface of the material after burning in the gas was due to the oxidation of the SiC in the layer to the silicon oxide , While the reaction layer also introduced impurities Fe, Na, Ca and Al; under the reaction layer of Si in the form of various elements Si, SiC and silicon oxide cross-sectional multi-point small area XPS analysis results show that the element The relative concentration of silicon decreases with increasing depth, and the relative concentration of SiC increases with increasing depth. XPS analysis of the cross section of the block clearly shows that SiC distributes roughly uniformly across the boundaries of the fiber bundles, The concentration of elemental Si is significantly higher.According to the linear scanning results of XPS images, the thickness of the Si-rich layer between the fiber bundle, the inter-beam SiC layer and the edge of the bulk material is estimated.