Wear Mechanisms in Thermally-Sprayed Mo-Based Coatings
作者:
S.F. Wayne,
S. Sampath,
V. Anand,
期刊:
Tribology Transactions
(Taylor Available online 1994)
卷期:
Volume 37,
issue 3
页码: 636-640
ISSN:1040-2004
年代: 1994
DOI:10.1080/10402009408983340
出版商: Taylor & Francis Group
关键词: Coatings and Films;Wear
数据来源: Taylor
摘要:
The successful development of advanced diesel engines relies heavily on piston ring coating materials which can withstand elevated temperatures and reduce friction. Traditional hard chrome plating and flame-sprayed Mo-wire materials have reached their potential in the diesel engine environment, and alternatives are needed. Thermally-sprayed Mo-based allays and composites are being evaluated for applications as next-generation ring-face coatings. The alloy development task of producing complex Mo-based alloy powders for use as thermally-sprayed coating materials requires an understanding of their wear resistance under contact stress conditions. In this paper, the wear behavior of Mo and Mo+NiCrBSi thermally sprayed coatings is examined by pin-on-disc and single-point scratch-test methods. Microstructural analysis beneath worn regions have revealed that fracture of splats and their decohesion constitute the mode of failure. Improved wear resistance and stability of low friction coefficient was obtained by prealloying Mo with NiCrBSi prior to thermal spraying.Presented at the 46th Annual Meeting in Montreal, Quebec, Canada April 29–May 2, 1991
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