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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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
Digital Object Identifier (DOI): doi:10.1007/s11249-010-9585-5
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
Accepted Date and Publication Date:
May 2010Published
Date Deposited: 02 Jun 2010 11:42
Last Modified: 31 Mar 2016 13:22
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

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