高强韧AlMgB14-TiB2/a-C多层薄膜涂层的可控制备及其苛刻工况摩擦磨损行为

AlMgB14-TiB2 nanocomposite coating is a novel wear-resistant tribological coating which is quickly developing in recent years. Oil-lubricated AlMgB14-TiB2 nanocomposite coatings show an extraordinary low-friction and anti-wear property under low-load sliding test, thus this technology has a very promising potential for industrial application. However, this coating experiences a sudden failure in harsh service environments, due to the fact that it is brittle in nature, which limits its further application. To solve this problem, we propose a multilayer structure composed of AlMgB14-TiB2/a-C to enhance the strength and toughness of AlMgB14-TiB2 coating. This project proposes a systematic study on AlMgB14-TiB2/a-C multilayer coating fabrication, multilayer structure design and optimization, multilayer toughening mechanism, and multilayer coating tribological behaviors and wear mechanisms under harsh service conditions. This project aims to elucidate the toughening mechanism for AlMgB14-TiB2/a-C multilayer coating. This project also aims to clarify the relationship between the surface tribo-chemical effects and harsh tribological conditions. The results obtained from this research will pave the way to the further commercial application of AlMgB14-TiB2/a-C multilayer coating.

油润滑AlMgB14-TiB2涂层在低载荷滑动摩擦测试条件下表现出优异的减摩耐磨性能，然而该涂层由于其较大的本征脆性在苛刻工况服役条件下迅速失效。本项目提出了通过制备AlMgB14-TiB2/a-C多膜层复合结构来提高AlMgB14-TiB2涂层强韧性能的创新研究思路。本项目拟通过AlMgB14-TiB2/a-C多层薄膜涂层的可控制备、结构设计与优化、多膜层结构的强韧化机制及其苛刻工况摩擦磨损行为的研究，获得综合性能最佳的高强韧AlMgB14-TiB2/a-C多层薄膜涂层，阐明AlMgB14-TiB2/a-C多层薄膜涂层的强韧化机制，揭示涂层强韧性能与其苛刻工况摩擦磨损行为的交互作用关系，建立苛刻工况条件下润滑油添加剂在涂层表面摩擦膜形成过程与摩擦化学反应机理的理论，为AlMgB14-TiB2/a-C多层薄膜涂层应用于苛刻工况服役条件奠定坚实的理论基础。

AlMgB14-TiB2纳米复合涂层是近年来发展迅速的一种新型减摩耐磨涂层材料，油润滑AlMgB14-TiB2涂层在低载荷滑动摩擦测试条件下表现出优异的减摩耐磨性能，因此具有良好的工业应用前景。本项目针对AlMgB14-TiB2涂层的苛刻工况失效问题，提出通过制备a-C/AlMgB14-TiB2叠层结构提高AlMgB14-TiB2涂层强韧性能的创新研究思路。本项目系统研究了氮掺杂AlMgB14-TiB2涂层在耐磨添加剂二烷基二硫代磷酸锌(ZDDP)润滑下的摩擦学行为和摩擦学性能, 系统研究了氮掺杂AlMgB14-TiB2/AlMgB14-TiB2叠层结构涂层在高载荷苛刻工况下的摩擦学行为和摩擦学性能, 系统研究了氮掺杂AlMgB14-TiB2涂层在摩擦改性添加剂二烷基二硫代氨基甲酸钼(MoDTC)润滑下的摩擦学行为和摩擦化学反应机理, 系统研究了油润滑a-C/AlMgB14-TiB2涂层在高载荷工况下的摩擦学行为和摩擦学性能。 通过系统研究，本项目阐明了氮掺杂AlMgB14-TiB2涂层在ZDDP润滑下的摩擦学行为和摩擦学性能，揭示了氮掺杂AlMgB14-TiB2/AlMgB14-TiB2叠层结构涂层在高载荷苛刻工况下的摩擦学行为和摩擦学性能。本项目阐明了氮掺杂AlMgB14-TiB2涂层在MoDTC润滑下的摩擦学行为和摩擦化学反应机理，阐明了油润滑a-C/AlMgB14-TiB2涂层在高载荷工况下的摩擦学行为和摩擦学性能，揭示了a-C对涂层摩擦学性能的影响, 阐明了高载荷工况条件下润滑油添加剂在a-C/AlMgB14-TiB2涂层表面摩擦膜形成过程与摩擦化学反应机理。在以上机理研究的基础上，我们实现了高载荷工况条件下油润滑掺氮AlMgB14-TiB2涂层与a-C/AlMgB14-TiB2叠层涂层的超低稳态摩擦学行为及优异耐磨性能。本项目所取得的成果将为AlMgB14-TiB2涂层的实际应用奠定坚实的理论基础。