空间冷焊效应的研究进展

综述了自20世纪60年代以来国内外航天机构对空间冷焊效应的研究成果.首先,从晶体结构与能量角度阐述了空间冷焊效应的机理,并讨论了表面氧化物、非化学计量化合物和晶体缺陷在冷焊效应中的作用.接着针对冷焊效应的主要影响因素,分别从接触类型、基体材料特性、接触面积与应力等方面进行了深入的分析,具体包括静载、冲击和微动3种接触类...

Research Progress of Space Cold Welding Effect

The research results of space cold welding effect on domestic and foreign space institutions since the 1960s were reviewed in this paper. First, based on the explanation of lattice structure and energy, the mechanism of the space cold welding effect was expounded. Also, the role of surface oxides, non-stoichiometric compounds and crystal imperfections in cold welding effect was discussed. The main factors affecting the cold welding effect including contact type, substrate materials, contact area and the stress, were also analyzed. It included the difference of cold welding effect under static load, impact and fretting, the comparison of adhesion force between different material, and the influence of contact area and contact stress on cold welding. The equipment for the research of the cold welding effect was introduced. Aimed at three common substrate materials for space moving parts (steel, aluminium alloy and titanium alloy), the protection measures for cold welding were summarized. It included coatings (such as MoS2, TiC, and DLC), hard anodizing and plasma electrolytic oxidation. According to the current research situation of the space cold welding effect in China, the main points of research and the development suggestions were put forward.