航空动力系统用氮化物基固-液复合润滑体系的自催化润滑效应研究

As development of the aviation industry, single technique of solid or liquid lubrication are no longer meet the lubricating demands of moving parts in the aviation power system. The possible great change of lubricating property of traditional solid films can be caused by its low wear resistance, low bearing capacity, high internal stress and low thermal stability under high speed, heavy load, high temperature and other harsh conditions. In order to solve this problem, we will develop multi-component and multi-layer nitride based catalytically active nanocomposite coatings by physical vapor deposition technique. The lubricating oil (PAO, PFPE, etc.) will be compounded on the surface of nitride based coatings to form a new breed of solid-liquid compound lubrication system. Then we will systematically study (1) the physical and chemical properties and the tribological performance of the solid/liquid compound lubrication systems in simulated aviation harsh environmen; (2) effect of the composition and structure of nitride based coatings, chemical composition of lubricating oil, the variation of lubricating oils and the interface behavior of the solid/liquid two phases on the tribological performance of this compound lubrication system; (3) deeper understanding the mechanisms of wear failure and developing the theory of prolonging life. So it can supply the theoretical basis and technical support for developing the solid/liquid compound lubrication system with low friction, long life and high reliability for aviation power system.

单一固体或液体润滑已无法满足未来航空动力系统关键运动部件的润滑需求，本项目瞄准现有固体薄膜在航空动力系统高速、重载、高温等苛刻使役条件下耐磨性不足、承载力弱、内应力高、热稳定性低等问题，拟通过采用物理气相沉积技术制备具有催化活性的多组元和多层氮化物基润滑涂层，利用表面旋涂或浸渍的方法与聚α烯烃、全氟聚醚、多元醇脂类油等润滑剂构成新型固-液复合自催化润滑体系。研究固液复合自催化润滑体系的物理、化学特性及其在模拟航空动力系统苛刻工况环境下的摩擦学性能，探讨固体涂层成分及微观结构、液体润滑剂及其分子组成、固/液表界面行为等对固-液复合润滑体系摩擦学性能的影响规律，揭示氮化物基复合自催化润滑体系的润滑失效机理及其延寿理论。为发展我国航空动力系统用低摩擦、长寿命与高可靠性的固-液复合润滑材料和技术提供理论依据。

单一固体或液体润滑已无法满足未来航空动力系统关键运动部件的润滑需求，本项目瞄准现有固体薄膜在航空动力系统高速、重载、高温等苛刻使役条件下耐磨性不足、承载力弱、内应力高、热稳定性低等问题，通过采用物理气相沉积技术制备具有催化活性的多组元和多层氮化物基润滑涂层，揭示了沉积工艺参数对氮化物基复合涂层成分、微观结构和力学性能的影响规律，发展了高性能MoN及MoN基改性复合涂层的组分设计和制备工艺方法，利用表面旋涂或浸渍的方法与聚α烯烃等润滑剂构成新型固-液复合自催化润滑体系，通过激光织构技术对涂层的表面进行图案化处理，研究了润滑油在不同形貌涂层表面的浸润性，开展了MoN基纳米晶涂层与油构成的复合润滑体系在表界面处的摩擦磨损以及自催化行为机制研究。最后考察了氮化物基固液复合体系在模拟航空动力系统苛刻工况环境下的摩擦学性能，揭示了高低温环境、载荷、转速等工况对氮化物基固液复合体系摩擦学性能的影响规律，阐明了氮化物基复合自催化润滑体系的润滑失效机理及其延寿理论，为发展我国航空动力系统用低摩擦、长寿命与高可靠性的固-液复合润滑材料和技术提供理论依据。