液相介质中脉冲放电制备TiAlC涂层及其高温磨损性能研究.pdfVIP

Treatment 2010年7月 材料热处理技术MaterialHeat 液相介质中脉冲放电制备(Ti，AI)C涂层 及其高温磨损性能研究 何玲，揭晓华，陈磊，卢国辉 C-东工业大学材料与能源学院，广东广州510006) 摘要：将Ti、Al按一定比例混合压制烧结成电极。置于含碳的液相介质中，利用脉冲放电所产生的低温高能等离 子体在45钢基体上沉积(Ti．AI)C硬质金属陶瓷涂层；并对涂层进行高温磨损试验。结果表明：试验温度高于200℃ 时，涂层的摩擦系数随温度的升高而降低；观察涂层磨损形貌发现，低温时，磨痕为平行犁沟，表明涂层的磨损机理为 磨粒磨损；高温时，犁沟比室温时浅且表面有氧化物，其磨损机理为轻微磨粒磨损和氧化磨损。 关键词：(Ti。AI)C陶瓷涂层；耐磨性；磨损机理 中图分类号：TGl74．44 文献标识码：A 文章编号：1001—3814(2010)14．0116-04 on ofCeramic Pulse in StudyPreparation Coatingby DischargeLiquid MediumandItsWearResistanceatHiglI．temperature HE Guohui Lei，LU Ling，瓜Xiaohua，C皿N and (CollegeofMateridEnergy,GuangdongUniversityofTechnology,Guan乎hou510006，China) Abstract：Theelectrodes TiandAI inacertain were in preparedbysintermg suppressed percentageplacedliquid medium carbon．Andthenahardmeml-ceramicwas onthesurfaceof45steel containing coatingdeposited bypulse was with wear wearresistancetested a device．The dischargegeneratedbyhighenergyplasma,the high—temperature resultsshowthatthefrictioncoefficientofthe decreaseswitlltheincrease thetest is coating oftemperature．whentemperature than200℃．Thewealscaris fillrowwhen islow．whichindicatesthatthewearmechanismofthe higher parallel temperature is at existonthe isabrasivewear．Thefurrowmoreshallowthanthat room oxides coating