3D打印钛合金骨架浸渗PE–UHMW复合材料制备及性能  

Preparation and Properties of 3D Printing Ti-6Al-4V Skeleton Impregnated PE–UHMW Composites

作　　者：李强 黎晓华[1,2] 王浩杰 Li Qiang;Li Xiaohua;Wang Haojie(College of Materials Science and Engineering,Shenzhen University,Shenzhen 518060,China;Shenzhen Key Labratory of Special Functional Materials,Shenzhen 518060,China)

机构地区：[1]深圳大学材料学院,广东深圳518060 [2]深圳市特种功能材料重点实验室,广东深圳518060

出　　处：《工程塑料应用》2020年第3期34-38,43,共6页Engineering Plastics Application

基　　金：深圳大学校企合作项目(4403012018003884)

摘　　要：通过选择性激光熔融技术(SLM)打印出Ti-6Al-4V(TC4)呈层间错位排列的钻石分子微结构金属骨架,将超高分子量聚乙烯(PE-UHMW)粉末和氧化石墨烯(GO)粉末通过热压浸渗的方法填充在骨架内部的孔隙当中,制备出不同孔隙率的金属骨架复合材料。然后在摩擦磨损试验机上研究了在干摩擦条件下,复合材料的磨损机制和骨架孔隙率对其摩擦学性能的影响,并且采用扫描电子显微镜和能谱分析等方法对磨损表面进行了表征分析。结果表明,与纯PE-UHMW相比,金属骨架和GO的引入可以形成转移膜,捕获磨屑,骨架可以优先承担大部分载荷,改善材料的摩擦系数和磨损率;复合材料的磨损机制主要为粘着磨损和磨粒磨损;当孔隙率达到56%时,复合材料摩擦磨损性能最优。The porous metal skeleton of titanium alloy(Ti-6Al-4V)was printed by SLM,and then the matrix of PE-UHMW powder and graphene oxide(GO)powder,which were milled and mixed,was infiltrated and filled in the pores of the skeleton by hot pressing.Composites of different kinds of metal skeleton porosity were prepared.Then,the wear mechanism of the composites and the influence of the porosity of the framework on the tribological properties were studied on the friction and wear test machine under dry friction condition.The wear surface was characterized by SEM and EDS.The results show that compared with pure PE-UHMW,the introduction of metal framework and GO can form transfer film,capturing wear debris,and the framework can take most of the load,improve the friction coefficient and wear rate of the material.The wear mechanism of the composite is mainly adhesive wear and abrasive wear.When the framework porosity is 56%,the friction and wear performance of the composite is the best.

关 键 词：3D打印 TI-6AL-4V 超高分子量聚乙烯 热压浸渗 摩擦磨损 

分 类 号：TH117.2[机械工程—机械设计及理论]