C/C复合材料表面改性薄膜的制备及摩擦磨损性能研究  

Preparationand friction and wear property study of C/C composites surface modification films

作　　者：袁璞 李红[1] 杨敏[1] 任慕苏[1] 孙晋良[1] YUAN Pu;LI Hong;YANG Min;REN Musu;SUN Jinliang(Research Center of Shanghai University Composite Materials,Shanghai University,Shanghai 200072,China)

机构地区：[1]上海大学复合材料研究中心,上海200072

出　　处：《功能材料》2020年第9期9012-9017,共6页Journal of Functional Materials

基　　金：上海市教育发展基金会和上海市教育委员会“曙光计划”资助项目(18SG34);国家重点研发计划政府间国际科技创新合作重点专项资助项目(2016YFE0111200)。

摘　　要：采用先驱体转化法在C/C复合材料基底表面制备了厚度为3~5μm的SiC薄膜和Si3N4薄膜;用球-盘对磨的方式测试了C/C复合材料基底、SiC薄膜和Si3N4薄膜在干态下的摩擦磨损性能。结果表明,制备的SiC薄膜和Si3N4薄膜表面结构均匀致密,无明显缺陷。C/C复合材料基底的平均摩擦系数为0.17,磨损率为1.93×10^-4 mm^3·N^-1·m^-1;SiC薄膜的平均摩擦系数为0.13,磨损率为0.78×10^-4 mm^3·N^-1·m^-1;Si3N4薄膜的平均摩擦系数为0.12,磨损率为0.45×10^-4 mm^3·N^-1·m^-1。与C/C复合材料基底相比,SiC薄膜和Si3N4薄膜的摩擦系数和磨损率都有所降低。C/C复合材料基底的摩擦磨损机理主要以磨粒磨损和粘着磨损为主,SiC和Si3N4薄膜的摩擦磨损机理主要以疲劳磨损为主。The SiC and Si3N4 films with 3~5μm thickness were prepared on the surface of C/C composite substrate by precursor transformation.Friction and wear properties of C/C composite substrate and SiC and Si3N4 films were investigated with a ball-on-disk tribometer in dry air.The results show the uniform and dense surface structure of SiC film and Si3N4 film without obvious defects.The average friction coefficient and wear rate of C/C composite substrate were 0.17 and 1.93×10^-4 mm^3/(N·m).The average friction coefficient and wear rate of SiC film were 0.13 and 0.78×10^-4 mm^3/(N·m).The average friction coefficient and wear rate of Si3N4 film were 0.12 and 0.45×10^-4 mm^3/(N·m).The friction coefficient and wear rate of films were reduced compare with the C/C composite substrate.The friction and wear mechanism of C/C composite substrate was mainly based on abrasive and adhesive wear,while SiC and Si3N4 film was mainly based on fatigue wear.

关 键 词：SIC薄膜 Si3N4薄膜 表面改性 摩擦学性能 摩擦行为分析 

分 类 号：TB332[一般工业技术—材料科学与工程]