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

Year 2020, Volume: 3 Issue: 1, 28 - 35, 20.06.2020

Cihan Özel , Abdulkadir Zirek

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 (580 and 500 A) and two different spray distances (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 (OM), scanning electron microscope (SEM), X-ray diffraction (XRD) and energy dispersed X-rays (EDS). Tribological properties of coatings were determined in disc-on-disc type wear test device at 3 different loads (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

Project Number

FUBAP-MF.18.13

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