Ding, Jiaqing Lu, Shiqi Chen, Zan Wei, Xubing Zhang, Haolin Guo, Peng Feng, Cunao Chen, Kai Lee, Kwang-Ryeol Li, Xiaowei 2024-10-26T15:30:17Z 2024-10-26T15:30:17Z 2024-10-25 2024-11 0272-8842 https://pubs.kist.re.kr/handle/201004/150885 Diamond-like carbon (DLC)/poly-alpha-olefin (PAO) composite system attracts much attention in reducing the tribo-induced risks for mechanical mobility systems and energy saving. However, the coupled effect of applied load and PAO viscosity on the tribological behavior of the DLC/PAO system, which normally causes the transition between different lubrication states of mated surfaces, and the corresponding synergistic mechanism remain unclear. Here, we fabricated the DLC/PAO composite system, and the evolutions of microstructure, morphologies, and tribological properties induced by both PAO viscosity and applied load were investigated systematically. Results indicated that under low applied load, the system with moderate PAO viscosity exhibited the best tribological performance, while the PAO with high viscosity was suggested with increasing the applied load. Moreover, the variations of PAO viscosity and applied load seriously affected the distribution and load-bearing capacity of oil, interfacial graphitization degree, and formation of lubricating oil film, which brought complicated effects on the tribological properties of composite systems. The present results guide the selection and design of an advanced DLC/PAO lubrication system according to the working conditions. English Pergamon Press Ltd. Synergistic lubrication of diamond-like carbon and poly-α-olefin oil: Coupled dependence on oil viscosity and applied load Article 10.1016/j.ceramint.2024.08.130 1 Ceramics International, v.50, no.21, pp.42846 - 42855 Ceramics International 50 21 42846 42855 N scie scopus 001329254600001 2-s2.0-85200851967 Materials Science, Ceramics Materials Science Article DLC COATINGS TRIBOLOGICAL PROPERTIES ADDITIVES FRICTION BEHAVIOR WEAR PAO Diamond-like carbon Poly-alpha-olefin Synergistic lubrication mechanism Viscosity Load