Microstructure and wear behavior of Cr2O3-40% TiO2 coating on magnesium alloy via plasma spraying

Authors : Cihan ÖZEL, Abdulkadir ZİREK

Pages : 28-35

View : 11 | Download : 8

Publication Date : 2020-06-20

Article Type : Research Paper

Abstract :In this study, the surface of the magnesium alloy was coated with Cr2O3-40% TiO2 by plasma spray coating method. The surface coating process was carried out at two different current insert ignore into journalissuearticles values(580 and 500 A); and two different spray distances insert ignore into journalissuearticles values(110 and 130 mm);, and the effects of these parameters on microstructure and mechanical properties were examined. Characterization of the coated surface layers was analyzed by optical microscope insert ignore into journalissuearticles values(OM);, scanning electron microscope insert ignore into journalissuearticles values(SEM);, X-ray diffraction insert ignore into journalissuearticles values(XRD); and energy dispersed X-rays insert ignore into journalissuearticles values(EDS);. Tribological properties of coatings were determined in disc-on-disc type wear test device at 3 different loads insert ignore into journalissuearticles values(2.5, 5 and 7.5 N); and 150 m sliding distance. Cr2O3, TiO2 and TiO were detected in the coating layers of samples coated with Cr2O3-40% TiO2. The hardness and wear resistance of the coatings are quite high compared to the magnesium alloy. Hardness and abrasion resistance decreased with decreasing current and increasing spray distance. The friction coefficient of the magnesium alloy is lower than the coated samples.
Keywords : Surface coating, Plasma spray, Magnesium alloys, Ceramics, Wear