A Diamond-Like Carbon Coating for Aluminum Alloy Piston/Bore Application

Paper #:
  • 960014

Published:
  • 1996-02-01
Citation:
Qiu, X., Elmoursi, A., Malaczynski, G., Hamdi, A. et al., "A Diamond-Like Carbon Coating for Aluminum Alloy Piston/Bore Application," SAE Technical Paper 960014, 1996, https://doi.org/10.4271/960014.
Pages:
8
Abstract:
This paper examines the potential use of diamond-like carbon (DLC) on aluminum alloy pistons of internal combustion engines. Our approach is to apply a DLC coating on the piston running against an aluminum-390 bore thus eliminating the iron liners in a standard piston/bore system. Experimental data, using a pin-on-disk tribometer under unlubricated test conditions, indicate that the performance of the DLC coating against aluminum 390 exhibits superior friction resistance compared to aluminum-390 against cast iron; the latter material couple representing the materials currently being used in production for the piston/bore application. Moreover, by thermally cycling the DLC coatings we show that improved friction and wear properties can he maintained to temperatures as high as 400°C.
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