In-situ fabrication of gradient titanium oxide ceramic coating on laser surface textured Ti6Al4V alloy with improved mechanical property and wear performance

• Published in: Vacuum 2020-06, Vol.176, p.109327, Article 109327
• Main Authors: Yuan, Shuo, Lin, Naiming, Zou, Jiaojuan, Lin, Xiuzhou, Liu, Zhiqi, Yu, Yuan, Wang, Zhenxia, Zeng, Qunfeng, Chen, Wengang, Tian, Linhai, Qin, Lin, Xie, Ruizhen, Li, Boqiong, Zhang, Hongxia, Wang, Zhihua, Tang, Bin, Wu, Yucheng
• Format: Article
• Language: English
• Subjects: Laser surface texturing; Thermal oxidation; Ti6Al4V alloy; Tribological behavior; Wear mechanisms
• ISSN: 0042-207X; 1879-2715
• DOI: 10.1016/j.vacuum.2020.109327

In this work, a duplex treatment of laser surface texturing (LST)-thermal oxidation (TO) was conducted on Ti6Al4V alloy to improve its mechanical property and wear performance. Microstructure, bonding strength, microhardness and nanoindentation behavior of the TO-Ti6Al4V were characterized. A comparative appraisal of wear performance for related samples of original Ti6Al4V, LST-Ti6Al4V, TO-Ti6Al4V and duplex treated-Ti6Al4V (DT-Ti6Al4V) were performed under dry sliding condition. The results revealed that gradient titanium oxide coatings with a thickness of 17 μm were in situ fabricated on the surface of Ti6Al4V and textured Ti6Al4V. The content of O displayed a gradient distribution across the TO-coating. TO treatment has improved the surface hardness and elasticity modulus of the Ti6Al4V. The specific wear rate of the samples was sorted in the following sequence: DT-Ti6Al4V