飞机刹车盘用炭/炭复合材料新型防氧化复合涂层  

Oxidation Resistance of a Novel Multi-coating for Carbon/Carbon Composites Used for Airplane Brakes

作　　者：李军[1] 罗瑞盈[1] 李强[1] 毕燕洪[1] 

机构地区：[1]北京航空航天大学理学院,北京100083

出　　处：《航空学报》2007年第6期1494-1498,共5页Acta Aeronautica et Astronautica Sinica

基　　金：武器装备预研基金(51469010305HK0101);教育部新世纪优秀人才资助计划(NCET-05-0195)

摘　　要：研究了一种工艺简单、成本低廉的飞机刹车盘用炭/炭复合材料防氧化复合涂层。该复合涂层由两层组成,其中内层由硼酸制备而成,外层由硼粉、炭化硼、氧化硅玻璃粉、有机硅树脂以及铝粉和铁粉制备成。恒温氧化和热震实验的结果表明:在700℃下空气中恒温氧化50h后,带该涂层试样的氧化失重率只有0.08%,同时在700℃下空气中热循环50次后,试样的氧化失重率也只有0.12%。另外,用扫描电镜(SEM)、X射线能量分散谱(EDX)、Raman光谱和差热分析(DTA)等方法分析了涂层的防氧化机理。A kind of simple and cheap multi-coating of carbon/carbon composites used for airplane brakes was studied in this paper. The multi-coating was composed by two layers, the inner coating was prepared with boric acid, and the outer one was constituted by boron, boric carbide, silica glass powder, silicone, aluminum powder and iron powder. The results of isothermal oxidation and thermal shock tests show that the weight loss rate of the specimen coated with multi-coating is only 0.08% after 50 h static oxidation at 700 ℃, meanwhile, the weight loss rate is 0.12% after thermal shock test for 50 times at 700 ℃. Microstructure analyses methods, including scanning electron microscope （SEM）, energy dispersive X-ray fluoresence spectrometer （EDX）, differential thermal analysis （DTA） and laser Raman spectroscopy, are used to investigate the mechanisms of the oxidation resistance.

关 键 词：炭/炭复合材料 飞机刹车盘 复合涂层 防氧化 

分 类 号：TB332[一般工业技术—材料科学与工程]