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C/C复合材料与熔盐的相容性好,而且具备优异的高温性能,在熔盐堆中将具有良好的应用前景。目前,国内外对于C/C复合材料在辐照下的表面结构研究尚少。文中采用0.5 MeV和1 MeV的Ar离子,利用扫描电子显微镜和拉曼光谱仪研究了辐照的C/C复合材料表面的形貌特征和显微结构变化。结果表明,随着辐照剂量的增大,C/C复合材料基体表面的损伤增加,并在其基体表面产生一定数量的裂纹和孔洞,裂纹和孔洞的尺寸最大可接近微米量级。能量为0.5 MeV、剂量为2.4×1016 ions·cm-2的Ar离子比能量为1 MeV、剂量为3×1016ions·cm-2的Ar离子对C/C复合材料基体表面的辐照损伤明显增加。
C / C composites have good compatibility with molten salt, and have excellent high temperature performance. They will have good application prospect in molten salt reactor. At present, there are few studies on the surface structure of C / C composites under irradiation. In this paper, the morphology and microstructure of irradiated C / C composites were investigated by scanning electron microscopy (SEM) and Raman spectroscopy using 0.5 MeV and 1 MeV Ar ions. The results show that with the increase of irradiation dose, the damage on the surface of C / C composites increases, and a certain number of cracks and holes are formed on the surface of the C / C composites. The size of cracks and holes can reach the order of micrometers. Ar ions with an energy of 0.5 MeV and an Ar ion dose of 2.4 × 10 16 ions · cm-2 with an energy of 1 MeV and Ar ions with a dose of 3 × 10 16 ions · cm -2 significantly increased radiation damage on the C / C composite substrate surface .