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Effect of reinforcing submicron SiC particles on the wear of electrolytic NiP coatings Part 1. Uni-directional sliding

Aslanyan, I. R. and Bonino, Jean-Pierre and Celis, J.-P. Effect of reinforcing submicron SiC particles on the wear of electrolytic NiP coatings Part 1. Uni-directional sliding. (2006) Surface and Coatings Technology, vol. 2 (n° 9). pp. 2909-2916. ISSN 0257-8972

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Official URL: http://dx.doi.org/10.1016/j.surfcoat.2004.10.005

Abstract

As-plated and annealed NiP coatings and composite NiP-SiC coatings were investigated in uni-directional ball-on-disc sliding tests. Abrasive wear was noticed in the case of composite NiP coatings containing submicron SiC particles, whereas in NiP coatings oxidational wear was active. The addition of submicron SiC particles not only increases the hardness of these electrolytic coatings but also hinders the formation of an oxide film in the sliding wear track. As a consequence, the wear loss on as-plated NiP coatings is not markedly reduced by the addition of SiC particles. On the contrary, a heat treatment at 420 °C for 1 h decreases the wear loss on both pure NiP and composite NiP-SiC coatings. During that heat treatment, Ni3P precipitates are formed in the NiP matrix and owing to this fact, the hardness of both pure NiP and composite NiP-SiC coatings increases. However, the heat treatment of composite NiP-SiC coatings induces the sensitivity for crack formation in the NiP matrix around these SiC particles. As a result, the pull out of SiC particles in the wear track occurs easily during sliding, and the wear loss of composite NiP-SiC coatings remains above the wear loss on NiP coatings.

Item Type:Article
Additional Information:This publication is available on http://www.sciencedirect.com/science/journal/02578972
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Other partners > Katholieke Universiteit Leuven (BELGIUM)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > Russian academy of sciences (RUSSIA)
French research institutions > Centre National de la Recherche Scientifique - CNRS
Laboratory name:
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Deposited By:Thomas Bonnecarere

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