Author/Authors :
Rinc?n، نويسنده , , C. and Zambrano، نويسنده , , G. and Carvajal، نويسنده , , A. and Prieto، نويسنده , , P. J. Galindo، نويسنده , , H. and Mart??nez، نويسنده , , E. and Lousa، نويسنده , , Mَnica A. and Esteve-Romero، نويسنده , , J.، نويسنده ,
Abstract :
Tungsten carbide/diamond like (W–C/DLC) multilayers have been investigated as low friction coatings on high-speed steel substrates. The coatings are composed of a W–C multilayer base and an upper lubricious DLC layer and they are obtained by reactive r.f. magnetron sputtering from a single target comprising of two equal halves; one-half carbon and the other half tungsten. The whole coating structure was obtained in situ, without any interruption of the sputtering process. Transmission electron microscopy (TEM) and SIMS were used to assess the multilayer structure and XPS, XRD, and Raman spectroscopy was used to analyze its composition. The tribological properties of the coatings in sliding wear were investigated by means of scratch test and ball-on-disc test measurements. It was found that the multilayer W–C base improves the adhesion of the upper DLC layer to steel substrates while maintaining its low friction coefficient.
