Al_(2)O_(3)-MWCNTs增强无机磷酸铝陶瓷涂层摩擦学性能的研究  

Study on Tribological Properties of Inorganic Aluminum Phosphate Ceramic Coating Reinforced with Al_(2)O_(3)-MWCNTs

作　　者：汪晨昱 武美萍 王剑宇 王轶遥 李泳润 缪小进 Wang Chenyu;Wu Meiping;Wang Jianyu;Wang Yiyao;Li Yongrun;Miao Xiaojin(School of Mechanical Engineering,Jiangnan University,Wuxi,Jiangsu 214000,China)

机构地区：[1]江南大学机械工程学院,江苏无锡214000

出　　处：《涂料工业》2024年第4期16-22,共7页Paint & Coatings Industry

基　　金：教育部联合基金(8091B032207)。

摘　　要：为提高无机磷酸铝涂层的高温耐磨性,降低高温下的摩擦系数,制备了氧化铝包覆多壁碳纳米管(MWCNTs)杂化型填料,将其加入到无机磷酸铝涂料中,采用X射线衍射分析仪(XRD)、傅立叶变换红外光谱仪(FT-IR)、拉曼光谱仪(Raman)、热重分析仪(TG)和扫描电子显微镜(SEM)等表征了填料结构,并研究了填料含量对复合涂层的力学性能和耐磨性能的影响规律。结果表明:纳米α-Al_(2)O_(3)成功接枝于多壁碳纳米管(MWCNTs)表面。经表面改性后的MWCNTs的氧化分解温度提升近100℃,杂化材料在涂层中的分散程度更佳。随着Al_(2)O_(3)-MWCNTs用量的增加,涂层硬度、附着力呈现先增加后降低的趋势,当Al_(2)O_(3)-MWCNTs用量为0.4%时,涂层力学性能最优,硬度提升至近2倍,附着力提升至近2.6倍。600℃高温摩擦磨损耦合试验结果表明,添加0.4%的Al_(2)O_(3)-MWCNTs涂层的摩擦系数最低为0.659,磨损率最小为2.73×10^(-4 )mm^(3)/(N·m),说明添加Al_(2)O_(3)-MWCNTs杂化填料确可有助于提高无机磷酸盐涂层的摩擦学性能。To improve tribological performance of inorganic aluminum phosphate composite coating at high temperature,the hybrid materials of multi-walled carbon nanotubes covered by aluminum oxide was prepared and added to above coatings.The properties and structure of the hybrid materials were determined by X-ray diffraction analysis(XRD),Fourier transform infrared spectroscopy(FT-IR),Raman spectroscopy,thermogravimetry analysis(TG),and scanning electron microscopy(SEM).And the effect of filler content on mechanical properties and wear resistance of the composite coatings were studied.All the results showed that nano-Al_(2)O_(3)was successfully grafted on the surface of multi-walled carbon nanotubes(MWCNTs).The surface-modified MWCNTs’oxidation temperature could be increased by over 100℃,and was dispersed more easily.The hardness and bonding of the coatings showed a tendency of increasing and then dropping with the increasing Al_(2)O_(3)-MWCNTs content,when the Al_(2)O_(3)-MWCNTs was 0.4%of the total coating component,the hardness could be increased to nearly twice as much,and its adhesion raised to nearly 2.6 times.The results of the friction and wear coupling test at high temperature of 600℃demonstrated that when the content of Al_(2)O_(3)-MWCNTs was 0.4%,the friction coefficient of the coating reduced to 0.659,and the wear rate reached the lowest value of 2.73×10^(-4) mm^(3)/(N·m).Which indicated that the introduction of Al_(2)O_(3)-MWCNTs hybrid materials enhanced the tribological performance of inorganic phosphate.

关 键 词：无机磷酸盐涂层 高温摩擦学性能 纳米复合涂料 碳纳米管 微观结构 

分 类 号：TQ637.2[化学工程—精细化工]