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), 155-160. (doi:10.1007/s11249-010-9585-5).

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Description/Abstract

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.

Item Type: Article
ISSNs: 1023-8883 (print)
1573-2711 (electronic)
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences
ePrint ID: 148793
Date Deposited: 02 Jun 2010 11:42
Last Modified: 28 Mar 2014 15:25
Research Funder: EPSRC
Projects:
The Centre for Advanced Tribology at Southampton
Funded by: EPSRC (EP/F034296/1)
Led by: Philip Arthur Nelson
1 April 2008 to 31 March 2013
URI: http://eprints.soton.ac.uk/id/eprint/148793

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