Structure and Properties of Ti-Si Composite Ceramic Coatings by Laser Cracking with SiO<sub>2</sub> Particles

Abstract

Ti-Si composite ceramic coating containing SiO2 particles was prepared on 45 steel substrate by in-situ laser pyrolysis with laser power of 600W and laser wavelength of 980nm. The density and wear resistance of the composite ceramic coating were improved. By means of scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), reciprocating friction and wear tester, the element composition, existing forms, surface morphology and friction and wear properties of Ti-Si composite ceramic coatings with different mass fraction of SiO2 particles were analyzed. The results show that the addition of SiO2 particles can improve the surface density and inorganic degree of the composite ceramic coating. When the mass fraction of SiO2 is 1% and the load is 1N, the friction coefficient of the composite ceramic coating is 61% lower than that of 45 steel. When the mass fraction of SiO2 is 5% and the load is 3N, the friction coefficient of the composite ceramic coating is 51% lower than that of 45 steel. The composite ceramic coatings show good antifriction performance and wear resistance.