模拟空间环境条件下Au/Ag、Au/Cu体系的表界面行为与调控

本项目针对我国空间高技术领域的基础科学问题和发展需求，系统研究Au/Ag和Au/Cu体系在真空、温度循环等模拟空间环境条件下的表面吸附、表面聚合、界面扩散等行为，阐明其表界面行为机理及其对摩擦学和电学性能的影响机理；在此基础上，将物理气相沉积技术引入我国空间用导电滑环镀层材料的研究，利用物理气相沉积技术在镀层材料的结构、组分及其表界面特性方面可调控性强的突出优势，发展空间用导电滑环镀层表界面调控技术手段；依据扩散理论、热力学理论和材料强化机制及其空间导电环机电一体化性能要求，系统研究镀层的结构、组分及其在模拟空间环境条件下的摩擦学性能和电学性能，探明其在电接触及模拟空间环境条件下的磨损机理，实现镀层结构、组分及其表界面特性的精细调控，赋予镀层材料低磨损、低接触电阻、低电噪声一体化特性，突破国外航天大国对我国空间用高性能导电滑环的技术封锁，为我国航天领域的进一步发展提供技术储备。

This project aims at the basic scientific problem and development need in the field of space technology in China, the surface adsorption, surface polymerization and interface diffusion of Au/Ag and Au/Cu systems under simulated space environment (vacuum and thermal cycling) will be studied systematically to clarify their surface and interface behavior and corresponding effects on tribological and electrical properties. On this basis, the physical vapor deposition will be introduced into the preparation and study of coating materials for space conductive slip ring due to its highly modification/control abilities on the structure, composition and surface/interface characteristics of coating materials, and hence the technology to modify and control the surface/interface behavior and properties of coatings for space application of conductive slip ring will be developed. Furthermore, according to the diffusion theory, thermodynamics theory, strengthening mechanism of metal and integration require of tribological and electrical properties for space conductive slip ring, the structure and composition of coatings and their tribological/electrical properties under simulated space environment will be studied to clarified the wear mechanism of coatings, to realize the fine modification of structure, composite and surface/interface behavior of coatings, to endow the low friction, low wear, low contact resistance and low electrical noise for coatings, to break the high-performance conductive-slip-ring technology from abroad blockade, and to provide the technical reserves for the further development of China's space industry.