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Microstructure, friction and wear analysis of thermoplastic based composites with solid lubricant

Published online by Cambridge University Press:  08 February 2013

Basma Ben Difallah ,
Mohamed Kharrat ,
Maher Dammak  and
Guy Monteil
Basma Ben Difallah
Affiliation:
Laboratoire des Systèmes Électromécaniques, École Nationale d’Ingénieurs de Sfax, Route de Soukra km 3,5, BP 1173, 3038 Sfax, Tunisia Institut Supérieur des Sciences Appliquées et de la Technologie de Gafsa, Campus Universitaire Sidi Ahmed Zarrouk, 2112 Gafsa, Tunisia Laboratoire FEMTO-ST, École Nationale Supérieure de Mécanique et des Microtechniques, 26 rue de l’Épitaphe, 25030 Besançon, France
Mohamed Kharrat*
Affiliation:
Laboratoire des Systèmes Électromécaniques, École Nationale d’Ingénieurs de Sfax, Route de Soukra km 3,5, BP 1173, 3038 Sfax, Tunisia Institut Préparatoire aux Études d’Ingénieurs de Sfax, Rte Menzel Chaker Km 0,5, BP 1172, 3018 Sfax, Tunisia
Maher Dammak
Affiliation:
Laboratoire des Systèmes Électromécaniques, École Nationale d’Ingénieurs de Sfax, Route de Soukra km 3,5, BP 1173, 3038 Sfax, Tunisia Institut Préparatoire aux Études d’Ingénieurs de Sfax, Rte Menzel Chaker Km 0,5, BP 1172, 3018 Sfax, Tunisia
Guy Monteil
Affiliation:
Laboratoire FEMTO-ST, École Nationale Supérieure de Mécanique et des Microtechniques, 26 rue de l’Épitaphe, 25030 Besançon, France
*
a Corresponding author: mohamed.kharrat@ipeis.rnu.tn
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Abstract

Thermoplastic based composites containing different weight fractions of molybdenum disulfide (MoS2) solid lubricant were developed by injection molding. Polymethyl methacrylate (PMMA) and polycarbonate (PC) were chosen for the thermoplastic matrices. In order to characterize the interfacial adhesion between the matrices and the filler, we observed the fracture morphologies of selected composites. Micrographs of the fractured surfaces showed removal of MoS2 particles by microcraking as well as the presence of voids in the case of PMMA/MoS2 composites. These observations were confirmed by complementary images obtained using the X-ray tomography. The addition of an appropriate coupling agent may improve the adhesion between the MoS2 particles and the polymer matrix. Tribological behavior of the composites was also investigated using a ball-on-flat microtribometer with a high chromium steel ball antagonist. It was found that the addition of MoS2 particles didn’t improve the tribological performance of the composite in the case of PMMA matrix unlike the case of PC matrix where the friction coefficient was considerably reduced.

Keywords

CompositethermoplasticMoS2solid lubricantinterfaceadhesionfrictionwear
Type
Research Article
Information
Mechanics & Industry , Volume 13 , Issue 5 , 2012 , pp. 337 - 346
Copyright
© AFM, EDP Sciences 2013

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