炭/炭复合材料表面氧化硼减摩涂层研究(英文)  

Fabrication and tribological properties of B_2O_3 as friction reducing coatings for carbon-carbon composites

作　　者：胡志彪[1] 李贺军[1] 付前刚[1] 薛晖[1] 孙国岭[1] 

机构地区：[1]西北工业大学超高温复合材料重点实验室炭/炭复合材料工程技术研究中心,陕西西安710072

出　　处：《新型炭材料》2007年第2期131-134,共4页New Carbon Materials

基　　金：国家杰出青年基金(50225210)~~

摘　　要：通过料浆法在碳化硅涂层炭/炭复合材料表面制备了三氧化二硼涂层。采用XRD、SEM对涂层的结构和表面形貌进行了表征,并对涂层的摩擦性能进行了测试,同时还探讨了涂层的润滑机理。结果表明:所制涂层的摩擦系数为0.06～0.08,比炭/炭复合材料的摩擦系数(0.15～0.18)低,减磨效果明显。究其原因主要在于三氧化二硼涂层在空气中,表面层将转变为硼酸,具有自润滑能力。B2O3 lubricating coatings for the SiC coated C/C composites were prepared by a slurry brushing method. The morphologies, components, and structure of the as-prepared coatings were characterized by SEM and XRD. The friction coefficient of the coatings was also tested, The lubricating mechanism of the coating is discussed, Results show that the friction coefficient of the coatings is 0.06- 0.08, which is less than that of the carbon/carbon composites （0.15-0.18）, The decrease of the friction coefficient of C/C composites after adding a SiC/B2O3 coating is attributed to the formation of a lubricious layer of boric acid from the boron oxide after exposure to the moisture in air.

关 键 词：炭/炭复合材料 B2O3 摩擦系数 磨损 

分 类 号：TB332[一般工业技术—材料科学与工程]