Frictional behavior of a synthetic engine oil, SJ/CF/5W-30, was investigated on a SRV reciprocating tribotester with tribo-materials consisting of Mo-sprayed coating, nitrided coating and Cr-plated coating sliding against cast iron operating under stepwise heating conditions. It was observed that, for the three tribo-materials, as operating temperature rose, there invariably existed a local minimum for frictional coefficient (μ), and the specific minimal μ value depended on the type of tribo-materials. Chemical characterization of worn cast iron surfaces using Raman spectroscopy indicated the existence of carbonaceous substances derived from the applied engine oil. There existed some correlation between microcrystal graphitic planar size (La value) and the local minimal frictional coefficient. Of the three tribo-materials, the maximal La value of the carbonaceous species was founded on the Mo-sprayed coating, and correspondingly, the lowest frictional coefficient occurred, indicating a more obvious anti-friction effect.
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World Tribology Congress III
September 12–16, 2005
Washington, D.C., USA
Conference Sponsors:
- Tribology Division
ISBN:
0-7918-4201-0
PROCEEDINGS PAPER
Frictional Behavior and Tribo-Carbonization of a Synthetic Engine Oil (SJ/CF/5W-30) With Different Tribo-Materials Under Stepwise Heating Conditions
Ruijun Zhang,
Ruijun Zhang
Yanshan University, Qinhuangdao, P. R. China
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Shenghua Li,
Shenghua Li
Tsinghua University, Beijing, P. R. China
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Yuansheng Jin
Yuansheng Jin
Tsinghua University, Beijing, P. R. China
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Ruijun Zhang
Yanshan University, Qinhuangdao, P. R. China
Shenghua Li
Tsinghua University, Beijing, P. R. China
Yuansheng Jin
Tsinghua University, Beijing, P. R. China
Paper No:
WTC2005-63847, pp. 533-534; 2 pages
Published Online:
November 17, 2008
Citation
Zhang, R, Li, S, & Jin, Y. "Frictional Behavior and Tribo-Carbonization of a Synthetic Engine Oil (SJ/CF/5W-30) With Different Tribo-Materials Under Stepwise Heating Conditions." Proceedings of the World Tribology Congress III. World Tribology Congress III, Volume 1. Washington, D.C., USA. September 12–16, 2005. pp. 533-534. ASME. https://doi.org/10.1115/WTC2005-63847
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