抄録
Sintering characteristics of TiN-TiC-Ni mixed powder compacts were studied by heating them in a gas atmosphere of nitrogen, hydrogen and argon, or in vacuum.
Shrinkage during sintering was disturbed by an abnormal expansion in a gas atmosphere of argon and hydrogen, or in vacuum, whereas in nitrogen the abnormal expansion was suppressed by the nitrogen pressure. So that the abnormal expansion is thought to be caused by the denitrification which took place during the formation of nitrocarbide, Ti(N, C).
Since the solubility in the nickel-solid solution increased with rise of the sintering temperature up to 1340°C, it may be considered that a eutectic between nickel-solid solution and Ti(N, C) occurs at about 1340°C.
