Magnetization of TiC–10TiN–xMC–yNi (MC = Mo2C, WC) cermets

Magnetization of TiC–10TiN–xMC–yNi (MC = Mo2C, WC, x = 0, 2, 4, 6, 8 mol%, and y = 20, 40 mol%) cermets was investigated. Room-temperature (RT) saturation magnetization Ms. of Mo2C-containing cermets decreased non-linearly with increasing x, and it tended to zero at x = 8 for y = 20 and x ≥ 6 for y = 40. At x = 8, Curie temperature Tc of Mo2C-containing cermets was about 50 K for y = 20 and 116 K for y = 40, respectively. RT Ms. of WC-containing cermets initially decreased, then increased and decreased again with increasing x, and it had the minimum at x = 4, which was about 6.12 emu/g for y = 20 and 10.16 emu/g for y = 40, respectively. At the same x and y, Mo2C-containing cermets had lower RT Ms. than WC-containing cermets. The strong suppression effect of Mo2C addition on magnetization of TiC–TiN–Ni cermets, in comparison with WC addition, was mainly attributed to high solubility of Mo2C in Ni-based binder phase of cermets.