Abstract Space irradiation-induced damage to onefold lubricants including four multialkylated cyclopentanes (MACs) space greases, Chromium doped diamond-like carbon (Cr-DLC) and molybdenum disulfide (MoS2) films was first investigated under simulated space environment (atomic oxygen (AO) and proton (PR)). Then solid-grease synergistic lubrication systems were prepared via spinning four space greases on Cr-DLC and MoS2 film, and their tribological behaviors were evaluated under simulated space environment including ultra-vacuum, AO and PR irradiation, low temperature (−100 °C). The irradiated damage mechanism and friction mechanism were explored by surface/interface analysis techniques. The results demonstrates that Cr-DLC film have better space adaptability than MoS2 film because irradiation induced partial transition of Cr-DLC’s micro-structure with the decrease in ID/IG ratio from 1.50 to 1.26 and the increase of sp3 content from 0.24 to 0.59, while the surface morphology and micro-structure of MoS2 film have dramatically changed. Solid-grease synergistic lubrication systems provide excellent friction-reducing and anti-wear behaviors (friction coefficient can be reduced up to below 0.05 under the special working conditions). Such excellent tribological performance of Cr-DLC-grease lubrication coatings is attributed to the friction-induced graphitization at the sliding interface, while that of MoS2 film mainly depends on its original structure/merits under greases lubrication.

中文翻译：

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类金刚石碳膜和二硫化钼膜对协同润滑的空间适应性比较

摘要 首先在模拟空间环境（原子氧（AO））下研究了空间辐射对单一润滑剂的损伤，包括四种多烷基化环戊烷（MAC）空间润滑脂、掺铬类金刚石碳（Cr-DLC）和二硫化钼（MoS2）薄膜。和质子 (PR))。然后通过在Cr-DLC和MoS2薄膜上旋转四种空间润滑脂制备固体润滑脂协同润滑系统，并在模拟空间环境下评估它们的摩擦学行为，包括超真空，AO和PR辐照，低温（-100°C） . 通过表面/界面分析技术探索了辐照损伤机制和摩擦机制。结果表明，Cr-DLC 薄膜比 MoS2 薄膜具有更好的空间适应性，因为辐照引起 Cr-DLC 微观结构的部分转变，ID/IG 比从 1.50 降低到 1.26，sp3 含量从 0.24 增加到 0.59，而MoS2薄膜的表面形貌和微观结构发生了巨大变化。固体油脂协同润滑系统提供优异的减摩和抗磨性能（特殊工况下摩擦系数可降至0.05以下）。Cr-DLC-油脂润滑涂层如此优异的摩擦学性能归因于滑动界面处的摩擦诱导石墨化，而MoS2薄膜的摩擦学性能主要取决于其在油脂润滑下的原始结构/优点。26 和 sp3 含量从 0.24 增加到 0.59，而 MoS2 薄膜的表面形貌和微观结构发生了显着变化。固体油脂协同润滑系统提供优异的减摩和抗磨性能（特殊工况下摩擦系数可降至0.05以下）。Cr-DLC-油脂润滑涂层如此优异的摩擦学性能归因于滑动界面处的摩擦诱导石墨化，而MoS2薄膜的摩擦学性能主要取决于其在油脂润滑下的原始结构/优点。26 和 sp3 含量从 0.24 增加到 0.59，而 MoS2 薄膜的表面形貌和微观结构发生了显着变化。固体油脂协同润滑系统提供优异的减摩和抗磨性能（特殊工况下摩擦系数可降至0.05以下）。Cr-DLC-油脂润滑涂层如此优异的摩擦学性能归因于滑动界面处的摩擦诱导石墨化，而MoS2薄膜的摩擦学性能主要取决于其在油脂润滑下的原始结构/优点。固体油脂协同润滑系统提供优异的减摩和抗磨性能（特殊工况下摩擦系数可降至0.05以下）。Cr-DLC 润滑脂润滑涂层的优异摩擦学性能归因于滑动界面处的摩擦诱导石墨化，而 MoS2 膜的摩擦学性能主要取决于其在润滑脂润滑下的原始结构/优点。固体油脂协同润滑系统提供优异的减摩和抗磨性能（特殊工况下摩擦系数可降至0.05以下）。Cr-DLC-油脂润滑涂层如此优异的摩擦学性能归因于滑动界面处的摩擦诱导石墨化，而MoS2薄膜的摩擦学性能主要取决于其在油脂润滑下的原始结构/优点。