固渗+EB-PVD法制备炭/炭复合材料防氧化复合涂层研究  

RESEARCH ON ANTI-OXIDATION COATING OF CARBON/CARBON COMPOSITES PREPARED BY PACK CEMENTATION EB-PVD PROCESS

作　　者：李军[1] 罗瑞盈[1] 张仁钦[1] 

机构地区：[1]北京航空航天大学理学院,北京100083

出　　处：《炭素技术》2007年第3期1-5,共5页Carbon Techniques

基　　金：武器装备重点实验室预研基金项目(51469010305HK0101);教育部新世纪优秀人才资助计划(NCET-05-0195);北京特色新材料产业关键技术开发项目(Y406001040211)

摘　　要：制备出了SiC/SiC-Al2O3-Y2O3炭/炭复合材料防氧化复合涂层,该复合涂层的内层SiC基涂层采用料浆固渗法制备,SiC-Al2O3-Y2O3外层涂层采用大功率电子束物理气相沉积法。研究表明,电子束物理气相沉积法能达到较好的沉积效果,在制备过程中形成了柱状晶结构的涂层,使得涂层具有更高的应变容限,涂层非常均匀致密。用SEM、XPS和EDS等分析方法分析了涂层的防氧化机理。结果表明:在制备过程和氧化过程中,涂层内会发生复杂的物理和化学变化,生成硅酸盐氧化物,显示出电子束物理气相沉积法在制备炭/炭复合材料防氧化涂层方面独特的优势。An anti-oxldation multilayer coating d SiC/ SiC -Al2O3- Y2O3 had been prepared in this research. The inner layer d SiC was made by pack cementation, and the out layer of SiC - Al2O3 - Y2O3 multilayer was made by high - power electron beam physics vapor deposition（EB - PVD）. The results showed that electron beam physics vapor deposition could improve deposition effect. There was a kind of column crystal structure generated on the coating during the procese of preparation, which made the coating have higher strain capability. SEM, XPS and EDS were used to analyse the anti - oxidation mechanism of the coating. The results showed that during the process of preparation and oxidation, some complicated physical and chemical reactions took place at interior coating, and formed silicate oxides, which showed unique superiority of EB - PVD on the preparation of oxidation resistance coatings for C/C composites.

关 键 词：炭/炭复合材料 电子束物理气相沉积 涂层 防氧化 

分 类 号：TB332[一般工业技术—材料科学与工程]