钛合金表面环氧基h-BN石墨共轭润滑涂层的摩擦学性能研究  

Study on tribological properties of epoxy-based h-BN/graphite conjugated lubrication coating on titanium alloy

作　　者：张韵波 左寒阳 肖吉源 吴桐 严红林 刘佳 卢建红 ZHANG Yunbo;ZUO Hanyang;XIAO Jiyuan;WU Tong;YAN Honglin;LIU Jia;LU Jianhong(School of Materials Science and Engineering,Sichuan University of Science and Engineering,Zigong 643000,China;Material Corrosion and Protection Key Laboratory of Sichuan Province,Zigong 643000,China;Sichuan Province Key Laboratory of Natural Products and Small Molecule Synthesis,Leshan 614000,China)

机构地区：[1]四川轻化工大学材料科学与工程学院,四川自贡643000 [2]材料腐蚀与防护四川省重点实验室,四川自贡643000 [3]天然产物化学与小分子催化四川省高校重点实验室,四川乐山614000

出　　处：《电镀与涂饰》2025年第1期126-133,共8页Electroplating & Finishing

基　　金：四川省自然科学基金(2022NSFSC0342);天然产物化学与小分子催化四川省高校重点实验室(TRCWYXFZCH2022A1);高校人才引进项目(2021RC01);四川轻化工大学科研创新团队计划资助(SUSE652A008)。

摘　　要：[目的]为克服钛合金表面硬度低、耐磨性差、粘合磨损严重等问题,研究了石墨与六方氮化硼(h-BN)在环氧树脂基涂料中共掺杂对其耐摩擦磨损性能的影响。[方法]采用刷涂法在TC6钛合金表面制备了不同石墨/h-BN质量比的环氧树脂基复合涂层,考察了涂层的附着力、铅笔硬度、摩擦因数、磨损三维形貌、磨损机制及腐蚀电化学行为。[结果]由h-BN和石墨构成的共轭润滑相能够发挥出比单一颗粒更优异的性能。石墨与h-BN的质量比1∶1时,涂层的附着力达到23.47 MPa,耐磨性和耐蚀性最佳。h-BN作为硬质相能改善涂层在高载荷和高转速下的抵抗能力,复合颗粒涂层的摩擦因数及比磨损率都低于单一颗粒涂层。涂层的磨损机制随着h-BN添加量的增大由以滑动摩擦为主导转变为以粘着磨损为主导。[结论]相较于传统的耐磨和减摩涂层,本涂层兼顾了硬度及自润滑性,同时实现了低摩擦因数和低磨损率,有一定的应用潜力。[Objective]To overcome the problems of low surface hardness,poor wear resistance,and serious adhesive wear of titanium alloys,the effect of graphite and hexagonal boron nitride(h-BN)co-doping on the friction and wear properties of epoxy-based coating and related wear mechanism were studied.[Method]Epoxy-based composite coatings with different proportions of graphite and h-BN were prepared on the surface of TC6 titanium alloy,and their adhesion strength,pencil hardness,friction coefficient,three-dimensional worn surface morphology,wear mechanism,and corrosion electrochemical behaviors were examined.[Result]The conjugated lubricating phase composed of h-BN and graphite performed better than a single type of particle.The coating prepared at a graphite/h-BN mass ratio of 1:1 had an adhesion strength of 23.47 MPa and showed the best wear resistance and corrosion resistance.The doping of h-BN as a hard phase improved the resistance of the coating under high load and high speed,and the friction coefficient and specific wear rate of the coating doped with both graphite and h-BN were lower than that of the one with only graphite or h-BN.The wear mechanism of the coating changed from sliding friction to adhesive wear with the increasing of the dosage of h-BN.[Conclusion]Compared with the traditional wear-resistant and antifriction coatings,this graphite/h-BN composite coating takes into consideration the hardness and self-lubricity,realizes the characteristics of low friction coefficient and low wear rate,and has certain application potential in the preparation of wear-resistant coatings in the future.

关 键 词：环氧树脂 石墨 六方氮化硼 复合涂层 钛合金 摩擦磨损 

分 类 号：TG178[金属学及工艺—金属表面处理]