INSTITUTO DE QUIMICA, FISICA DE LOS MATERIALES, MEDIOAMBIENTE Y ENERGIA
Unidad Ejecutora - UE
Characterization and frictional behaviour of nanostructured Ni-W-MoS2 composite coatings
M. F. CARDINAL; P. A. CASTRO; J. BAXI; H. LIANG; F. J. WILLIAMS
SURFACE AND COATINGS TECHNOLOGY
ELSEVIER SCIENCE SA
Lugar: Amsterdam; Año: 2009 vol. 204 p. 85 - 85
NiWMoS2 composite coatings were obtained by pulse plating from a NiW electrolyte containing suspended MoS2 particles. The coating composition, morphology, crystalline structure, microhardness and frictional behavior were studied as a function of MoS2 concentration. The results obtained in this study indicate that co-deposited lubricant particles strongly influenced the composite NiW coating properties. It was found that increasing co-deposited MoS2 diminished tungsten content in the coating and consequently increased the average grain size. NiW nanostructured coatings with high MoS2 content have a porous sponge-like structure, high surface roughness and irregular frictional behavior. However, the friction coefficient of NiW coatings is reduced to half its value with low MoS2 content.