Ti/TiB_2多层膜在模拟体液中生物摩擦学行为研究  

Biotribological Properties of Ti/TiB_2 Multilayers in Simulated Body Solution

作　　者：陈昌佐 赵欣欣[1] 庄国志[2] 王湘鸣 印凤 丁红燕[1,2] 章跃[1] 

机构地区：[1]淮阴工学院 江苏省介入医疗器械研究重点实验室,江苏淮安223003 [2]江苏大学材料科学与工程学院,江苏镇江212013

出　　处：《淮阴工学院学报》2014年第3期11-15,25,共6页Journal of Huaiyin Institute of Technology

基　　金：国家自然科学基金项目(51175212);江苏省介入医疗器械研究重点实验室开放基金项目(JR1206)

摘　　要：采用磁控溅射的方法在医用钛合金Ti6Al4V表面制备了具有不同调制比的Ti/TiB2多层膜,并考察多层膜在Hank’s模拟体液中与超高分子量聚乙烯(UHMWPE)配副的摩擦磨损性能。研究结果表明:所制备的多层膜层状结构清晰,与基体结合良好,各子层保持一定的择优取向。多层膜在模拟体液中的摩擦磨损性能与调制比间存在着一定的依赖关系。当多层膜调制比为1:5时,其平均摩擦系数约为0.1,与Ti6Al4V相比降低了28.6%,UHMWPE磨损速率降低了近一个数量级,呈现出良好的减摩耐磨效应。多层膜的引入有效抑制了Ti6Al4V合金发生氧化磨损,而使其表现为不同程度的磨粒磨损和粘着磨损。在调制比为1:5时,多层膜/UHMWPE的生物摩擦学性能最佳,并有望在人工关节表面改性上获得应用。Ti/TiB2 multilayers with various modulation ratios （tTi：tTiB2 ） were prepared by magnetron sputtering on biomedical titanium alloy Ti6A14V. The tribological properties of the multilayers sliding against ultra - high molecular weight polyethylene （ UHMWPE ） under lubrication in Hank＇s solution were also investigated. The results showed that each sublayer in the muhilayers grew along a preferred orientation, accompanied with clear laminate structures and good bonding between substrate and muhilayers. It was found that the trihological properties were strongly depended on the modulation ratios of multilayers. The friction coefficient of multilayer with modulation ratios of i ：5 （tTi：tTiB2） was 0.1, which reduced by 28.6%. The wear rate of UHMWPE was decreased by almost one order of magnitude compared to that of Ti6A14V alloy, exhibiting an excellent anti - friction and anti - wear capability. The oxidation wear of Ti6A14V alloy could be restrained effectively and converted to abrasion wear and/or adhesive wear attributed to the laminate structures in the muhilayer. The multilayer with modulation ratios of 1：5 presented the best biotribological performance, indicating a potential candidate for the surface modification of artificial joints.

关 键 词：多层膜 钛合金 Hank's模拟体液 摩擦 

分 类 号：TH117[机械工程—机械设计及理论]