Matériaux & Techniques
Volume 101, Number 4, 2013
|Number of page(s)||6|
|Section||Tribologie / Tribology|
|Published online||18 July 2013|
Characterization of Ni-Cr coating failures deposited on CW614 substrate using friction coefficient evolution
Laboratoire des Systèmes Electromécaniques (LASEM), École
Nationale d’Ingénieurs de Sfax (ENIS), Université de Sfax,
B.P.W3038, Sfax, Tunisie
Accepted: 12 June 2013
In this study, characterization of the total wear of coatings by the friction coefficient evolution of nickel-chromium (Ni-Cr) coatings is presented. The device used is a developed ball-on-disc tribometer. The samples tested in this study are brass discs (CW614) coated with Ni-Cr layers sliding against a steel ball. The effect of normal load, sliding velocity and substrate roughness on the wear of coatings is studied. An optical microscope (OM) and energy dispersive spectroscopy (EDX) are used to confirm the coating failures. The results show that the total wear of Ni-Cr coatings is related to the sliding distance. However, an increase in normal load and/or sliding velocity increases the total wear of the coating, whereas the reduction of the substrate roughness reduces the coating failures and increases their service behavior.
Key words: Friction coefficient / Ni-Cr coatings / CW614 substrate / coating failures
© EDP Sciences, 2013
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.