Preparation of (Ti, Al)C Ceramic Coating on Carbon Steel by Electrical Discharge Coating and its Properties Research
Multi-component ceramic coating (Ti, Al)C was prepared on the 45 carbon steel by electrical discharge coating (EDC) in kerosene. The (Ti, Al)C coating was analyzed by different methods including X-ray diffraction (XRD), scanning electron spectroscopy (SEM) and energy disperse spectroscopy (EDS).The thermo gravimetric technique was used to approximate the kinetics of oxidation of the (Ti, Al)C coating and the carbon steel and the tribological performance is tested too. The results indicated the thickness of the coating was about 20μm, and the composition of the ceramic coating mainly consisted of (Ti, Al) C and Fe. An oxide film with compact structure formed after 600°C oxidation for 200h, and it was mainly composed of Al2O3 and TiO2, which inhibited further oxygen diffusion into the coating. The (Ti, Al) C coating possessed slow oxidation rate and high temperature oxidation resistance. The coefficient of the coating was lower than that of carbon steel and it had excellent abrasion resistance performance at the load of 100N. Carbon steel lose weight tremendously with an increase at the load of 100, but for the (Ti, Al) C coating the weight loss was very slow.
Chunliang Zhang and Liangchi Zhang
G. L. Li et al., "Preparation of (Ti, Al)C Ceramic Coating on Carbon Steel by Electrical Discharge Coating and its Properties Research", Key Engineering Materials, Vols. 531-532, pp. 108-113, 2013