Study on improved tribological properties by alloying copper to CP-Ti and Ti-6Al-4V alloy
Study on improved tribological properties by alloying copper to CP-Ti and Ti-6Al-4V alloy
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DOI：
10.1016/j.msec.2015.07.046
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发表时间：
2015-12-01
影响因子：
7.9
通讯作者：
Liu, Weiqiang
中科院分区：
文献类型：
--
作者：
Wang, Song;Ma, Zheng;Liu, Weiqiang
铜合金化到钛及其合金被认为显示出抗菌性能。然而，铜合金钛合金的摩擦学性能的研究很少。为了进一步研究含Cu钛合金的摩擦磨损性能，制备了Ti-5Cu和Ti-6Al-4V-5Cu合金。利用X射线衍射仪（XRD）、扫描电镜（SEM）、透射电镜（TEM）和硬度计对复合材料的显微组织、成分和硬度进行了表征。采用球-盘摩擦试验机测试了ZrO 2在25%牛血清中的摩擦学性能。结果表明，Ti-5Cu和Ti-6Al-4V-5Cu合金中均存在Ti 2Cu金属间化合物的析出。摩擦学实验结果表明，Ti-5Cu和Ti-6Al-4V-5Cu合金的摩擦磨损性能均因Ti 2Cu的析出而得到改善。结果还表明，由于与硬质氧化锆连接时的磨损机制不同，CP-Ti和Ti-5Cu的耐磨性均优于Ti-6Al-4V和Ti-6Al-4V-5Cu。CP-Ti和Ti-5Cu均表现出以粘着磨损为主的二次磨粒磨损机制，而Ti-6Al-4V和Ti-6Al-4V-5Cu均表现出严重的二次粘着磨损机制，这是由于它们的显微组织和材料类型决定了它们的表面硬度不同。(C)2015爱思唯尔B. V.保留所有权利。
Copper alloying to titanium and its alloys is believed to show an antibacterial performance. However, the tribological properties of Cu alloyed titanium alloys were seldom studied. Ti-5Cu and Ti-6Al-4V-5Cu alloys were fabricated in the present study in order to further study the friction and wear properties of titanium alloys with Cu additive. The microstructure, composition and hardness were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM) and hardness tester. The tribological behaviors were tested with ZrO2 counterface in 25% bovine serum using a ball-on-disc tribo-tester. The results revealed that precipitations of Ti2Cu intermetallic compounds appeared in both Ti-5Cu and Ti-6Al-4V-5Cu alloys. The tribological results showed an improvement in friction and wear resistance for both Ti-5Cu and Ti-6Al-4V-5Cu alloys due to the precipitation of Ti2Cu. The results also indicated that both CP-Ti and Ti-5Cu behaved better wear resistance than Ti-6Al-4V and Ti-6Al-4V-5Cu due to different wear mechanisms when articulated with hard zirconia. Both CP-Ti and Ti-5Cu revealed dominant adhesive wear with secondary abrasive wear mechanism while both Ti-6Al-4V and Ti-6Al-4V-5Cu showed severe abrasive wear and cracks with secondary adhesive wear mechanism due to different surface hardness integrated by their microstructures and material types. (C) 2015 Elsevier B.V. All rights reserved.