等离子喷涂WC/Co疏水涂层  

Plasma Sprayed WC/Co Hydrophobic Coating

作　　者：秦加浩 金鑫 方帅帅 周拓 乔江浩 纪晓丽[2] QIN Jia-hao;JIN Xin;FANG Shuai-shuai;ZHOU Tuo;QIAO Jiang-hao;JI Xiao-li(School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu;School of Financial Accounting, Shaanxi Institute of International Trade and Commerce, Xi＇an 712046)

机构地区：[1]中国矿业大学材料科学与工程学院,江苏徐州221116 [2]陕西国际商贸学院财务会计学院,西安712046

出　　处：《中国表面工程》2017年第6期26-33,共8页China Surface Engineering

基　　金：国家自然科学基金(51741509);江苏省大学生科研创新项目(201610290109X);中央高校基本科研业务费专项资金(2014QNA13);中国博士后科学基金(138357)~~

摘　　要：超疏水涂层的耐磨性是限制其应用的重要因素。利用等离子喷涂结合十七氟癸基三甲氧基硅烷(FAS-17)的表面化学修饰制备出接近超疏水的WC/Co硬质合金涂层。结果表明:涂层的静态接触角最高达到147°;随着喷涂功率的增加,涂层接触角略微有所增加;拉曼光谱和XPS分析表明,FAS-17链通过水解及缩合反应成功枝接到涂层的表面;激光共聚焦显微镜(LSCM)观察发现,涂层表面粗糙度Ra为7.9μm;通过等离子火焰氧化处理后,涂层表面新生成的氧化物为WO_3,它能够提高涂层的疏水性能。最后,通过砂纸摩擦试验发现,其疏水性涂层表现出良好的耐磨性;水滴冲蚀测试发现,涂层有一定的耐雨淋性能。Wear resistance is a vital cause that limits the application of superhydrophobic coatings. In this study, WC/Co cemented carbide coating nearly superhydrophobic characteristic were prepared by plasma spraying and further surface chemical modification with FAS-17 （Heptadecafluoro-1,1,2,2-tetradecyl trimethoxysilane）. The results show that the static water contact angle （WCA） of the WC/Co coating reaches 147°. With increasing plasma spraying power, the WCA slightly increases. The Raman spectroscopy and XPS analysis testify that the chain of FAS-17 is grafted onto the surface of the coating by hydrolysis and subsequent condensation reaction. The surface roughness Ra is 7.9 μm by laser scanning confocal microscopy （LSCM）. After plasma flame oxidization, the oxide WO3 was formed on the surface of the coating, and improved the hydrophobicity. Finally, WC/Co hydrophobic coating shows good wear resistance in the sand paper abrasion experiment and good anti-rain property in the water erosion test.

关 键 词：疏水 等离子喷涂 WC/CO 火焰氧化 耐久性 

分 类 号：TG174.442[金属学及工艺—金属表面处理] O647[金属学及工艺—金属学]