The effect of temperature on water desorption and oxide formation in MoS2 coatings and its impact on tribological properties
The effect of temperature on water desorption and oxide formation in MoS2 coatings and its impact on tribological properties
复制标题
温度对MoS2涂层中水解吸和氧化物形成的影响及其对摩擦学性能的影响
DOI：
10.1016/j.surfcoat.2021.128077
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发表时间：
2022
影响因子：
5.4
通讯作者：
Dreva K
中科院分区：
文献类型：
--
作者：
Dreva K
二硫化钼（MoS2）广泛用于航空航天应用中，其中液体润滑剂不适用。MoS2在真空中具有优异的摩擦学性能，然而，需要进一步的研究来充分了解由于储存和地面测试而暴露于环境大气中的不同温度时发生的机制。在AISI 440 C钢基体上沉积MoS2涂层，在75 °C的高温下进行摩擦磨损试验，研究了空气中温度对磨损机制的影响。结果发现，在75 °C左右的温度下，检测到的表面氧化物不影响MoS2的摩擦学性能。室温下的水分子阻碍了MoS2层的排列，使一些活性边缘部位暴露于接触表面，导致高摩擦和磨损。水分子的解吸促进层的平行排列，降低剪切强度、摩擦和磨损。
Molybdenum disulfide (MoS2) is used extensively in aerospace applications, where liquid lubricants are not suitable. MoS2has excellent tribological properties in vacuum, however, further research is required to fully understand the mechanisms taking place when exposed to varying temperatures in ambient atmosphere due to storage and on-ground testing. MoS2coatings were deposited on AISI 440C steel substrates, friction and wear tests were conducted at increasing temperatures, up to 75 °C, determining the effect of temperature on wear mechanisms in air. It was found that the detected surface oxides do not impact tribological properties in MoS2at temperatures around 75 °C. The water molecules at room temperature hinder the alignment of MoS2layers leaving some active edge sites exposed to contacting surfaces, leading to high friction and wear. Desorption of water molecules promote parallel alignment of layers, reducing shear strength, friction and wear.