Abstract
The sinterabilities of fine Mo 2C powders with a particle size of less than 0.3 μm produced by chemical vapour deposition (CVD) and commercial Mo 2C powders with a particle size of about 2 μm were investigated at 900–1500°C in hydrogen and at 1500 and 1750°C in vacuum. Both types of powder gave sintered bodies with relative densities above 90% at 1500°C. The powders produced by CVD showed a higher sinterability in vacuum than in hydrogen. It is suggested that free carbon retards the sintering of Mo 2C particles. The higher sinterability of the powders chemically vapour deposited in vacuum is attributed to the removal of free carbon by the reaction of surface oxygen.
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