Abstract
Various compositions of$ Cr_2$$O_3$/Mo composite powders were fabricated using spray-drying method and plasma-spray coatings of these powders were prepared to understand their tribological properties. Experiments were conducted using a reciprocal type tribo-tester at room temperature under dry sliding condition. The worn surface of coated specimens were observed using SEM (Scanning Electron Microscopy) and chemical compositions were analyzed using XRD (X-ray Diffractometry) and XPS (X-ray Photoelectron Spectroscopy). The results showed that friction coefficient of the Mo added specimens were lower than that of $Cr_2$$O_3$specimen. However $Cr_2$$O_3$specimen showed the lowest wear loss. Wear protecting layer were observed at the worn surface of coated specimens with Mo addition. From the XPS analysis, the mixed phases of $Cr_2$$O_3$ $CrO_3$and $MoO_3$were founded in the wear protecting layer.
