Enhanced wear resistance of in-situ TiC/Ni composites by doping Ni@CeO2 particles

The Ce dissolves into TiC particles, leading to the increased hardness from 632 HV to 701 HV, as the Ni@CeO2 content increases from 0 wt% to 0.6 wt%.

The introduction of 1 wt% Ni@CeO2 results in diminished structural integrity, inducing the reduced hardness to 646 HV. The wear mechanism of TiC/Ni composites includes delamination wear, oxidative wear, adhesive wear and abrasive wear. As the Ni@CeO2 content increases from 0 wt% to 0.6 wt%, the wear mechanism changes to delamination wear, oxidative wear and adhesive wear, due to the higher hardness and oxidation resistance.