Abstract
Tungsten carbide-cobalt cermets respectively doped with 0, 0.5, 1.0, 1.5 and 2wt% aluminum nitride were fabricated by the sintering process at 1400°C. The existence of aluminum nitride in the binder phase could refine tungsten carbide grains and reinforce the obtained cermets. The cermets with 1.0wt% aluminum nitride exhibited the higher hardness of 17.1GPa and transverse rupture strength of 3120MPa, compared with 15.6GPa and 2500MPa of the pure cermets. Owing to the addition of aluminum nitride, a high oxidation resistance was measured in cermets with 2.0wt% aluminum nitride, which is nearly 1.9 times than that in the pure cermets.
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