Enhanced Wear Resistance of TC4 Surface by h-BN/TiO 2 -WO 3 In Situ Composite Film Layer

作者：Zhaolong Li, Yongqiang Wang, Bangxv Wang, Lei Zhao, Mengchen Yuan · 发表于：Langmuir · 年份：2025 · DOI：10.1021/acs.langmuir.5c01998 · 被引用次数：3 · 研究领域：Metal and Thin Film Mechanics、Magnesium Alloys: Properties and Applications、Aluminum Alloys Composites Properties

There is an urgent need to improve the self-lubricating, wear-resistant, and high-thermal conductivity properties of metal surfaces in titanium alloys, such as TC4, in extreme aerospace environments. In this study, a new h-BN/TiO 2 -WO 3 in situ composite film layer with high hardness and a self-lubricating, multifunctional coating was proposed using a microarc oxidation (MAO) technique to improve the wear resistance of TC4. During the MAO breakdown process, WO 3 uniformly enters the film layer, accompanied by a strong electric field in the breakdown channel, which adsorbs the h-BN particles. This causes the h-BN particles to cluster inside the breakdown channel and in the surrounding area. The h-BN/TiO 2 -WO 3 composite structure significantly improved the hardness performance. The optimized composite coating has the lowest average coefficient of friction of 0.12 and the lowest specific wear rate of 4.29 (10 –5 mm 3 ·N –1 ·m –1 ), and the hardness reaches 1269 HV 1N . The strong chemical and physical bonding at the interface further enhances the high hardness, wear resistance, and self-lubrication properties of TC4. The composite film layer prepared in this article has become an ideal solution to improve the service performance and life of TC4 titanium alloy components under extremely harsh conditions.