Advances in preparation process of anti-oxidant coatings for C/C composites
Carbon/carbon(C/C)composites have excellent physical and chemical properties,but they are easily oxidized in high tem-perature aerobic environment,which greatly limits their applications in the aerospace field.Anti-oxidant coating technology is considered to be the most effective way to improve the oxidation resistance of C/C composites.The traditional preparation processes,including packing cementation(PC),chemical vapour deposition(CVD),plasma spraying(PS),sol-gel,and so on,are currently the most widely used technologies in engineering.The coating characteristics and application fields of these processes are systematically introduced,and the research progress in process optimization is reviewed.The emerging preparation processes including LPPS,LPCVD,PECVD,EPD,have not been widely applied in engineering.The design ideas and working principles of these processes are introduced,and the latest research progress of the anti-oxidant coatings prepared by these processes is reviewed.The applications of preparation process of anti-oxidant coatings in aerospace field are analyzed,and the future developments of anti-oxidant coating technology are prospected.
C/C compositesoxidation resistancecoatingpreparation process
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