Sintering of Mo2FeB2 layered cermet containing SiC fibers

In the present investigation Mo2FeB2 based cermet (KH-C50) and its composites containing SiC fibers were sintered in two different atmospheres namely hydrogen and vacuum. It was observed that vacuum sintered samples have remarkably lower porosities than the hydrogen sintered ones. Two different sintering cycles were employed for each of the atmosphere and properties of the material were studied. Introduction of fibers in the composite imparts shrinkage anisotropy during sintering. The 2 vol.% SiC fiber-containing vacuum sintered cermets have transverse rupture strength (TRS) similar to straight cermet, but sintered at faster heating rate accompanied with a reduction stage.