Abstract

GOMEZ, MARYORY; LOUSA, ARTURO  and  ESTEVE, JOAN. EVALUATION OF TRIBOLOGICAL AND MECHANICAL PROPERTIES OF CrC COATINGS DEPOSITED BY R.F. MAGNETRON SPUTTERING. Dyna rev.fac.nac.minas [online]. 2010, vol.77, n.162, pp. 115-124. ISSN 0012-7353.

This paper presents the results obtained with a series of CrC coatings deposited by means of r.f magnetron sputtering, which presented carbon contents in the range between 25‑58 % as it is shown by EDS measurements. Hardness values of these coatings were between 15 and 24 GPa, being the hardest values in the samples with carbon content in the 39‑53 % range. A correlation has been found between carbon content and friction coefficient values which are in the 0,70 to 0,15 range, obtaining these last values for coatings with carbon excess. Wear behavior under dry sliding tests showed also a marked dependence with carbon content. The best results of wear were obtained for the highest carbon content coatings.

Keywords : Hard coatings; chromium carbide; r.f. magnetron sputtering; tribological properties; mechanical properties.