MoS2 tribofilm distribution from low viscosity lubricants and its effect on friction
MoS2 tribofilm distribution from low viscosity lubricants and its effect on friction
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DOI：
10.1016/j.triboint.2020.106531
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发表时间：
2020-11-01
影响因子：
6.2
通讯作者：
Morina, Ardian
中科院分区：
文献类型：
--
作者：
Vaitkunaite, Gerda;Espejo, Cayetano;Morina, Ardian
本研究分析了含有不同浓度的二烷基二硫代氨基甲酸钼（MoDTC）摩擦改进剂的低粘度全配方油的摩擦性能。已知MoDTC摩擦改性剂在摩擦接触中产生MoS2片，从而在边界润滑条件下提供低摩擦系数。然而，关于油中MoDTC的浓度与触点中MoS2的量和分布之间的定量关系的知识很少。本研究使用拉曼光谱绘图能力来表征由不同化学润滑剂和在由λ比定义的不同摩擦学条件下形成的摩擦膜。经过定性和定量的化学表面表征的讨论，提出了突出一些重要的方面，涉及形成的二硫化钼片，它们在摩擦膜和随后的摩擦学性能的空间分布。
The current study analyses the friction performance of low viscosity fully-formulated oils containing the Molybdenum Dialkyl Dithiocarbamate (MoDTC) friction modifier at different concentrations. The MoDTC friction modifier is known to produce MoS2 sheets in the tribocontact providing a low coefficient of friction under boundary lubrication conditions. However, there is a little knowledge around the quantitative relationship between the concentration of MoDTC in the oil and MoS2 amount and distribution in the contact. The study uses Raman spectroscopy mapping capability to characterise the tribofilm formed from different chemistry lubricants and under different tribological conditions as defined by the lambda ratio. After qualitative and quantitative chemical surface characterisation a discussion is presented to highlight some important aspects to relate the formed MoS2 sheets, their spatial distribution in tribofilms and the subsequent tribological performance.