Abstract

Ti(C,N) solid solutions in hot-pressed Ti(C_xN_1-x) (x=0.0, 0.3, 0.5, 0.7, 1.0) and 40TiC-40TiN-20Ni (in wt.%) cermet were characterized in this study. For hot-pressed Ti(C,N)s, the lattice parameters and hardness values of Ti(C,N) were determined by using XRD (X-Ray Diffraction) and nanoindentation. The properties of hot-pressed Ti(C,N) samples changed linearly with their carbon or nitrogen contents. For the TiC-TiN-Ni cermet, the hardness of the hard phase and binder phase were determined by nanoindentation in conjunction with microstructural observation. The measured hardness values were sim8.7 GPa for the binder phase and sim28.7 GPa for the hard phase, which was close to the hardness of hot-pressed Ti(C_0.7N_0.3).

• Keywords: Ti(C, N);Solid solution;Cermet;Hardness;Nanoindentation;