Constructing WS2/MoS2 nano-scale multilayer film and understanding its positive response to space environment
Constructing WS2/MoS2 nano-scale multilayer film and understanding its positive response to space environment
复制标题
构建WS2/MoS2纳米级多层薄膜并了解其对空间环境的积极响应
DOI：
10.1016/j.surfcoat.2018.08.072
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发表时间：
2018-11-15
影响因子：
5.4
通讯作者：
Hu, Ming
中科院分区：
文献类型：
--
作者：
Gao, Xiaoming;Fu, Yanlong;Hu, Ming
在空间技术中有着重要应用的过渡金属二卤化物(TMDs)薄膜具有独特的多孔结构，导致其耐磨性较差。TMDS/金属多层膜具有较好的微观结构和摩擦学性能，但由于它们之间的热/力学性能不匹配以及金属对原子氧(AO)的敏感性，这些性能并不可靠。为了改善TMDS薄膜的微观结构、力学性能、摩擦学性能和环境适应性，本研究制备了MoS2/WS2纳米多层膜。结果表明，与MoS2或WS2单层膜相比，多层膜具有致密的微结构、较强的(002)织构和较高的硬度。相应地，它在真空中的耐磨性显著提高，其磨损寿命比单层膜高出一个数量级。模拟试验表明，在TMDS/金属多层膜体系中，即使是剧烈的热冲击也不能引起多层膜的剥离，而AO辐照的氧化被限制在膜的表面层(
Characteristic porous microstructure causes poor wear resistances of sputtered transition metal dichalcogenides (TMDs) films that have important applications in space technology. TMDs/metal multilayer films exhibit improved microstructural and tribological properties, but which are unreliable due to the mismatch in thermal/mechanical properties between them as well as the metal sensibility to atomic oxygen (AO). In this study, MoS2/WS2 nano-scale multilayer films were fabricated to improve the microstructural, mechanical, tribological and environment-adaptive properties of TMDs films. Results revealed that as compared with MoS2 or WS2 single layer film, the multilayer film exhibited a dense microstructure, strong (002) texture and high hardness. Correspondingly, it showed a significantly improved wear resistance in vacuum, whose wear life was similar to one order longer than those of single-layer films. Simulation tests revealed that even drastic thermal shock could not cause the delamination of multilayer film, which was observed from TMDs/metal multilayer system; and the oxidation from AO irradiation was restricted into film surface layer (