Sintered porous cermets based on TiB2 and TiB2-TiC-Mo2C

TiB2 powder, with different binders (Ni and Ni/Mn), after milling were cold compacted (300 MPa) and sintered in H-2 at 1300 and 1350 degreesC for 1 h. To improve the sintering behaviour, TiC/Mo2C alloy carbide was added and t he milled charge along with the same binders (Ni and Ni/Mn) was cold compac ted and sintered under similar conditions. Sintered density, porosity, tran sverse rupture strength (TRS), grain size and lattice parameter of binder a nd hard phases were measured. Better densification was observed with Ni/Mn binder as compared to Ni binder for either hard phase based systems. Maximu m value of TRS was noted for TiB2-TiC-Mo2C-40 wt.% Ni/Mn cermet. Melt exuda tion was observed for either hard phase based systems with Ni binder. (C) 2 001 Published by Elsevier Science B.V.