MoDTC lubrication of DLC-involving contacts. Impact of MoDTC degradation
MoDTC lubrication of DLC-involving contacts. Impact of MoDTC degradation
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DOI：
10.1016/j.wear.2015.12.001
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发表时间：
2016-02-15
期刊：
影响因子：
5
通讯作者：
Martin, J. M.
中科院分区：
文献类型：
--
作者：
De Feo, M.;Bouchet, M. I. De Barros;Martin, J. M.
近年来，类金刚石碳（DLC）涂层由于其低摩擦、高硬度、良好的耐磨性和耐腐蚀性以及高的热稳定性和化学稳定性而引起了人们的广泛关注。尽管已经对基于铼的添加剂的作用进行了大量的研究，二硫代氨基甲酸钼（MoDTC），对DLC涂层的边界润滑，导致涂层去除的磨损机制尚未完全理解的日期。此外，还没有研究含MoDTC的基础油的降解对DLC涂层的摩擦学性能的影响。本文研究了不同氢含量和不同掺杂元素的DLC涂层在MoDTC基础油中的摩擦磨损性能。为了使这些变化之间的相关性和修改的接触表面化学，摩擦过程中产生的摩擦膜进行了研究，通过SEM结合能量色散X射线光谱（EDX）和X射线光电子能谱（XPS）。提出了一种新的机制来解释DLC涂层在含MoDTC基础油润滑时所经历的严重磨损。(C)2015 Elsevier B.V.版权所有。
Recently Diamond-Like Carbon (DLC) coatings have attracted considerable attention due to their low friction, high hardness, good wear and corrosion resistance, and high thermal and chemical stability. Although considerable research has been conducted on the effect of molybdenum-based additives, e.g., molybdenum dithiocarbamate (MoDTC), on the boundary lubrication of DLC coatings, the wear mechanisms leading to the coating removal are not fully understood to date. Moreover, the impact of the degradation of the MoDTC-containing base oil on the tribological properties of DLC coatings has not been investigated. This study could help to elucidate the mechanisms by which the coating is worn out in presence of MoDTC-containing base oil.In this work, the friction and wear performances of DLC coatings with different hydrogen contents and doping elements have been investigated in the presence of MoDTC-containing base oil. To enable the correlation between these changes and the modification of the contact surface chemistry, tribofilms generated during friction were investigated by SEM combined with Energy Dispersive X-ray Spectrometry (EDX) and X-ray Photoelectron Spectroscopy (XPS). A new mechanism explaining the severe wear experienced by DLC coatings when lubricated with a MoDTC-containing base oil is proposed. (C) 2015 Elsevier B.V. All rights reserved.