Tribological properties of tribofilms formed from ZDDP in DLC/DLC and DLC/steel contacts |
| |
Authors: | Balasubramaniam Vengudusamy Jonathan H GreenGordon D Lamb Hugh A Spikes |
| |
Affiliation: | a Tribology Group, Department of Mechanical Engineering, Imperial College London, London SW7 2AZ, UK b Castrol Ltd., Pangbourne, Reading RG8 7QR, UK |
| |
Abstract: | Diamond-like carbon coatings (DLCs) are considered to hold great promise for improvement in friction and wear resistance of engine parts. It is hence interesting to know whether conventional engine oil additives such as ZDDP can form tribofilms and reduce friction and wear in DLC contacts as effectively as they do in steel on steel contacts. This paper compares the behaviour with ZDDP of six different DLC coatings. It is seen that ta-C gives lower boundary friction than the other types while a-C:H gives better wear prevention. A ZDDP-derived tribofilm forms on all DLCs but a pad-like structure is seen only on W-DLC in DLC/DLC tribopairs. |
| |
Keywords: | DLC coatings ZDDP Tribofilm AFM |
本文献已被 ScienceDirect 等数据库收录! |