Effect of AlN Content on Microstructure and Properties ofTi(C,N)-Based Cermet

The effect of AlN addition amount (0,1%,2%,3%, mass fraction) on the hardness, bending strength and oxidation resistance of Ti(C,N)-based cermets was studied. The results show that the cermets with different addition amount of AlN were all mainly composed of Ti(C,N), Ni₃Al and nickel phases. With increasing the addition amount of AlN, the hardness of the cermet increased, and the bending strength increased first and then decreased, reaching the peak value with 2%AlN. The oxidation mass gain of the cermet with 2%AlN increased slowly compared with the without AlN, and the oxide film structure was relatively dense, indicating the better oxidation resistance.