Cu/Ti_3SiC_2复合材料的制备及其磨损性能研究

Preparation of Cu/Ti_3SiC_2 and Its Wear Property

以Cu粉、Ti3SiC2粉末为原料,采用热压烧结技术,制备了不同体积分数的Cu/Ti3SiC2复合材料。用光学显微镜分析了该复合材料的微观组织,利用环块式摩擦磨损试验机测试了其磨损性能,采用SEM、EDS和XRD观察分析发该复合材料的磨损表面形貌及其组成。结果表明:Ti3SiC2在基体组织中分布均匀,随着其含量的增加,其在基体组织中的分布有聚集的趋势,材料的致密度逐渐下降;磨损质量损失在Ti3SiC2含量达到20vol%时最小;该复合材料的磨损机理以粘着磨损、磨粒磨损为主,同时伴随有一定量的氧化磨损,氧化产物为Cu2O。

Cu/Ti3SiC2 composite was fabricated by hot pressing sintering technique using Cu and Ti3SiC2 powders as raw material. The microstructure of the composite was analyzed by optical microscope. The abrasion of the composite was tested by ring block type wear testing machine, and its morphology and composition were observed by XRD, SEM and EDS. The results indicate that Ti3SiC2 distributes evenly in Cu matrix. With the increase of the content of Ti3SiC2, there is a tendency of aggregation and the density of the composite gradually decreases. The wear mass loss comes to the minimum when the content of Ti3SiC2 is 20vol%. The wear mechanism of the composite is adhesive wear and abrasive wear, accompanied by a certain amount of oxidation wear. The oxidation product is Cu2O.