Tribological properties and microstructures of Al2O3-TiC-TiB2 reinforced composites

Abstract

AbstractTi-3Al-2V alloy is an important aviation material but shows poor resistance to slid wear. Laser cladding of the Fe3Al-B4C pre-placed powders on a Ti-3Al-2V substrate can form the TiC-TiB2 reinforced composites, which improved the wear resistance of the substrate. In this study, it was noted that the addition of the Al2O3 and 7 wt.% yttria partially stabilized zirconia (YPSZ) was able to further increase the wear resistance of such composites. Al2O3 increased the dilution rate of the substrate to the laser molten pool to a certain extent; moreover, Al2O3 improved the hardness, elastic modulus and the mechanical properties of such laser clad composites. The YPSZ addition led t-ZrO2-ZrSiO4 to be produced in such composites.