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Gradient DLC-Based nanocomposite coatings as a solution to improve tribological performance of aluminum alloy

Wang, Liping, Wan, Shahong, Wang, Shuncai, Wood, R.J.K. and Xue, Q.J. (2010) Gradient DLC-Based nanocomposite coatings as a solution to improve tribological performance of aluminum alloy Tribology letters, 38, (2), pp. 155-160. (doi:10.1007/s11249-010-9585-5).

Record type: Article


The low hardness and poor tribological performance of aluminum alloy as moving component greatly restricts their wide applications in automotive fields. In this letter, an attempt to deposit gradient Ti/TiN/Si/(TiC/a-C:H)multi-layer on aluminum alloy is thus effectively performed
by a combined arc ion plating and magnetron sputtering process based on the concept of involving coatings with a functionally graded interface. Multi-layered structure within DLC-based coatings has shown to significantly improve the load-bearing capacity, anti-wear and self-lubricating ability of Al alloys. The friction coefficient of gradient DLC-based coatings decreased to 0.18 under dry sliding condition while kept at 0.05 under the oil-lubricated conditions. The wear rate of gradient DLC
multilayers was lower by two and even three orders of
magnitude when compared with Al alloys both under dry
wear and oil-lubricated conditions. Such gradient DLCbased
coatings with good adhesion strength, high hardness,
and excellent tribological performance are considered as
potential protective surfaces of Al alloys for engine parts.

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Published date: May 2010


Local EPrints ID: 148793
ISSN: 1023-8883
PURE UUID: 89dd63ae-b8c9-489b-bede-e825ca8d9de8
ORCID for R.J.K. Wood: ORCID iD

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Date deposited: 02 Jun 2010 11:42
Last modified: 18 Jul 2017 19:31

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Author: Liping Wang
Author: Shahong Wan
Author: Shuncai Wang
Author: R.J.K. Wood ORCID iD
Author: Q.J. Xue

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