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Development of nickel phosphorus coatings containing micro particles of talc phyllosilicates

Alexis, Joël and Gaussens, Clélia and Etcheverry, Bernard and Bonino, Jean-Pierre Development of nickel phosphorus coatings containing micro particles of talc phyllosilicates. (2013) Materials Chemistry and Physics (137 ). 723-733. ISSN 0254-0584

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Official URL: http://dx.doi.org/10.1016/j.matchemphys.2012.09.049

Abstract

The present work aims to characterized nickel phosphorus coatings co-deposited with talc particles on steel. The NiP-talc composite deposits were developed to serve as hard coatings with a lubricating effect at 600 C. This process, which is free of hexavalent chromium, could provide a reliable substitute for the electrodeposition of hard chromium coating used in industrial applications. Local responses to static and dynamic mechanical loading have been obtained by nano- and microhardness, microtensile and nanoscratch testing. The hardness and stiffness values slightly decrease when the amount of talc increases for untreated coatings. In contrast, a 420 C heat treatment leads to high hardness and Young’s modulus values due to crystallization. Moreover, a 600 C heat treatment lowers these values through overageing. A 420 C heat treatment greatly improves the adherence and the cohesion of the coatings containing talc.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at : http://dx.doi.org/10.1016/j.matchemphys.2012.09.049
HAL Id:hal-00828234
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > ALSTOM Transport (FRANCE)
Laboratory name:
Funders:
Conseil Régional de Midi Pyrénées (France)
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Deposited By: Joël ALEXIS
Deposited On:27 Feb 2013 09:42

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