Chen Xionggang, Wei Tianqi, Wang Haidong, Chen Zhiwei, Zhan Danyan, Huang JinXia, Guo Zhiguang
School of Materials Science and Engineering, Hubei University, Wuhan 430062, China; State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.
School of Materials Science and Engineering, Hubei University, Wuhan 430062, China.
J Colloid Interface Sci. 2025 Jan 15;678(Pt C):393-408. doi: 10.1016/j.jcis.2024.09.126. Epub 2024 Sep 14.
Given the notoriously poor wear performance of Ti6Al4V (TC4) alloys, two types of MgAl layered double hydroxides (LDHs) were synthesized as lubrication additives. Systematic tribological tests were conducted to explore the performance of the TC4 alloy with these MgAl LDHs at varying concentrations in oil. It was found that, with increasing additive concentration, the wear resistance of TC4 significantly improved. Notably, MgAl LDHs with a hexagonal nanosheet structure exhibited superior lubrication performance, reducing the coefficient of friction (COF) by approximately 67.94 % compared to dry friction, and markedly enhancing the anti-wear characteristics of the TC4 alloy. Furthermore, to improve the utility of TC4 alloy in industrial applications, titanium nitride (TiN) coatings with excellent mechanical properties were deposited onto the TC4 substrate using arc ion deposition. A comprehensive analysis of the tribological behavior and wear mechanisms of TiN coating with the two MgAl LDHs additives was also conducted. Results indicated that the combination of TiN hard coatings and MgAl LDHs lubricants achieved high wear resistance for the TC4 substrate. In conclusion, a low-wear synergistic protection system integrating TiN coatings and high-performance MgAl LDHs lubricants was developed, demonstrating effective protection for TC4 alloys. This strategy not only presents a novel approach for reducing wear in TC4 alloys but also provides a reliable method for safeguarding and ensuring the long-term stability of titanium alloys mechanical components under demanding conditions.
鉴于Ti6Al4V（TC4）合金的磨损性能 notoriously poor，合成了两种类型的MgAl层状双氢氧化物（LDHs）作为润滑添加剂。进行了系统的摩擦学测试，以探索在油中不同浓度下添加这些MgAl LDHs的TC4合金的性能。结果发现，随着添加剂浓度的增加，TC4的耐磨性显著提高。值得注意的是，具有六方纳米片结构的MgAl LDHs表现出优异的润滑性能，与干摩擦相比，摩擦系数（COF）降低了约67.94%，并显著增强了TC4合金的抗磨损特性。此外，为了提高TC4合金在工业应用中的实用性，使用电弧离子沉积在TC4基体上沉积了具有优异机械性能的氮化钛（TiN）涂层。还对添加两种MgAl LDHs的TiN涂层的摩擦学行为和磨损机制进行了综合分析。结果表明，TiN硬涂层和MgAl LDHs润滑剂的组合使TC4基体具有高耐磨性。总之，开发了一种集成TiN涂层和高性能MgAl LDHs润滑剂的低磨损协同保护系统，对TC4合金表现出有效的保护作用。这种策略不仅为减少TC4合金的磨损提供了一种新方法，而且为在苛刻条件下保障和确保钛合金机械部件的长期稳定性提供了一种可靠的方法。
