溶胶-凝胶法在金刚石表面涂覆铝-硅-硼氧化物涂层的研究  

Coating with Al_2O_3-SiO_2-B_2O_3 film on diamond surface in sol-gel method

作　　者：刘小磐[1] 万众[2] 钱琦[2] 韩雪[1] 王俊沙[1] 

机构地区：[1]湖南大学材料科学与工程学院,湖南长沙410082 [2]吉林大学物理学院,吉林长春130021

出　　处：《超硬材料工程》2011年第1期5-8,共4页Superhard Material Engineering

基　　金：科技部科技支撑项目(2006BAF02A21)资助

摘　　要：采用溶胶-凝胶法在金刚石表面涂覆了铝-硅-硼氧化物涂层,并用扫描电子显微镜、综合热分析仪和抗压强度仪对涂层的形貌、结构以及涂膜前后金刚石的氧化行为和单颗粒金刚石的抗压强度进行了表征。结果表明:所制得的涂层在金刚石颗粒表面分布较均匀,结构致密,可将金刚石颗粒的起始氧化温度提高100℃左右,并能有效地延缓金刚石在高温环境下的氧化速度,同时还可以提高金刚石单颗粒抗压强度约22.75%。Based on the sol-gel method,the diamond surface was coated with a thin film of Al2O3-SiO2-B2O3.The microstructure,oxidation behaviors and fracture strength of diamond were characterized by scanning electron microscopy（SEM）,thermogravimetric-differential scanning calorimetry（TG-DSC） in air and single compressive fracture test.The results showed that diamond surface was completely wrapped by the thin film of Al2O3-SiO2-B2O3.The diamond coated Al2O3-SiO2-B2O3 was 100℃ higher of the beginning oxygenation temperature and lower of the oxidation rate than the un-coated diamond and the single diamond compressive strength increases by 22.75%.

关 键 词：铝-硅-硼氧化物 溶胶-凝胶法 金刚石 涂层 

分 类 号：TQ164[化学工程—高温制品工业] TG74[金属学及工艺—刀具与模具]