Formation mechanisms of zinc, molybdenum, sulfur and phosphorus containing reaction layers on a diamond‐like carbon (DLC) coating
Formation mechanisms of zinc, molybdenum, sulfur and phosphorus containing reaction layers on a diamond‐like carbon (DLC) coating
复制标题
类金刚石碳（DLC）涂层上含锌、钼、硫、磷反应层的形成机制
DOI：
10.1002/mawe.201900178
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发表时间：
2020-07
影响因子：
1.1
通讯作者：
K. Bobzin;T. Brögelmann;C. Kalscheuer;M. Thiex
中科院分区：
文献类型：
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作者：
K. Bobzin;T. Brögelmann;C. Kalscheuer;M. Thiex
类金刚石碳（DLC）涂层由于具有减少摩擦和磨损的效果，如今已成功应用于润滑摩擦接触中的活塞、活塞环和轴承等工业部件。与此相反，今天的润滑剂和添加剂是为摩擦学钢/钢接触而设计的，因此与类金刚石碳涂层、润滑剂和添加剂之间的物理化学相互作用相比，钢表面上摩擦化学层形成的知识是全面的。因此，在锆改性的类金刚石碳涂层a-C：H：在T = 90 °C和接触压力p = 1的边界和混合摩擦条件下，通过销盘（PoD）摩擦计，通过改变s = 200 m-3，000 m的距离，分析润滑摩擦接触中的Zr（ZrCg），300 MPa，用于在齿轮上应用类金刚石碳涂层。使用抗磨（AW）和极压（EP）添加剂二烷基二硫代磷酸锌（ZnDTP）和摩擦改进剂（FM）添加剂二烷基二硫代磷酸钼（MoDTP）配制基础润滑剂聚α烯烃（PAO）。通过拉曼光谱和X射线光电子能谱（XPS）分析，摩擦化学反应层的化学组成以及厚度随添加剂的变化而显著不同。
Diamond‐like carbon (DLC) coatings are nowadays successfully applied on industrial components like pistons, piston rings and bearings in lubricated tribological contacts due to friction and wear reducing effects. In contradiction thereto, todays lubricants and additives are designed for tribological steel/steel contacts, whereby the knowledge on tribochemical layer formation on steel surfaces is comprehensive in contrast to the physical‐chemical interactions between diamond‐like carbon coatings, lubricants and additives. Therefore the formation mechanisms of zinc, molybdenum, sulfur and phosphorus containing reaction layers on a zirconium modified diamond‐like carbon coating a‐C : H : Zr (ZrCg) in lubricated tribological contacts were analyzed by means of pin‐on‐disc (PoD) tribometer by varying the distances from s = 200 m–3,000 m under boundary and mixed friction conditions at T = 90 °C and a contact pressure p = 1,300 MPa regarding the application of diamond‐like carbon coatings on gears. The base lubricant poly‐alpha‐olefin (PAO) was formulated using the anti‐wear (AW) and extreme pressure (EP) additive zinc dialkyldithiophosphate (ZnDTP) and the friction modifier (FM) additive molybdenum dialkyldithiophosphate (MoDTP). The chemical composition of the tribochemical reaction layers by means of and Raman spectroscopy and x‐ray photoelectron spectroscopy (XPS) as well as for the thickness differ significantly by varying the additivation.