固体润滑薄膜是实现航天器机械部件可靠性的关键之一，然而，薄膜的润滑性能很大程度上受制于服役环境。解析空间润滑薄膜的微观摩擦机制和失效机制对于新型环境适应型润滑薄膜的成分和结构设计至关重要。二维过渡金属硫属化物（MX2）作为新型二维纳米材料以其独特的物化性能和优良的减摩性能在空间润滑领域表现出潜在的优势，且MX2简单的拓扑结构使其成为深入了解微观摩擦机制的理想对象。基于此，本项目耦合化学气相沉积和等离子体表面改性技术实现系列MX2基纳米薄膜的可控制备，研究薄膜结构缺陷、异质结和层数等内在因素对其摩擦行为的影响；同时选择高湿（滨海发射场）和高通量原子氧辐照两种典型的苛刻环境，拟通过异质结和多层构筑、薄膜-基底界面调控、表面改性的方法增强MX2基纳米薄膜在苛刻环境下的摩擦性能，阐明MX2基纳米薄膜在苛刻环境下的抗粘、减摩机制，为发展新型空间润滑薄膜材料建立科学基础和设计依据。

Solid lubrication film is the key to the reliability of mechanical parts in spacecraft. However, the lubricating performance of the film is largely restricted by the service environment. Analyzing the micro-friction mechanisms and failure mechanisms of the space lubrication films are very important for the composition and structure design of the new environmentally adaptive lubrication films. Two-dimensional transition metal chalcogenide (MX2), as a new two-dimensional nano-material, shows potential advantages in the field of space lubrication owing to its unique physical and chemical properties as well as excellent friction reduction properties. And the simple topology of MX2 also makes it become an ideal material to deeply understand the micro-friction mechanisms. Based on this, the project aims to achieve the controllable preparation of a series of MX2-based nano-films via chemical vapor deposition and plasma surface modification technology, and study the effect of intrinsic factors (such as structural defects, heterostructures, and number of layers) on their frictional behavior. At the same time, the frictional properties of MX2-based nano-films under the harsh environments (high humidity for the coastal launch site and high flux atomic oxygen irradiation were selected) were enhanced through the designing of heterostructure and multilayer interface, modulation of film-substrate interface, and modification of film surface, thereby illustrating the anti-stick and friction reduction mechanisms of MX2-based nano-films in the harsh environments. This research will establish a scientific foundation and design basis for the development of new space lubrication films.