| 摘要 |
PURPOSE:To eliminate pores remaining on the inside of a thick sintered body and to densify it by using the powder of Ta and Nb or their alloy powder as the raw material for Ta or Nb to enter into solid soln. in a hard phase and a bonding phase. CONSTITUTION:Ni-Mo double boride or Ni-Mo-W compound boride is used as a hard phase and an alloy essentially consisting of Ni and Mo or Ni, Mo and W is used as a bonding phase to manufacture a cermet sintered body. At this time, as the raw material for Ta and Nb as auxiliary components to be entered into solid soln. in the hard phase and bonding phase, one or more kinds of powder selected from Ta powder, Nb powder, Ta-B alloy powder, Nb-B alloy powder, Ta-Ni alloy powder and Nb-Ni alloy powder is used. In the bonding phase, the content of Ta is preferably regulated to about 1 to 25wt.% and the content of Nb to about 1 to 35wt.%. |
