DENSE TiC-Al_2O_3-Fe CERMET FABRICATED BY SHS

Dense TiC-Al₂O₃-20Fe cermet was produced by self propagating high temperature synthesis and pseudo hot isostatic pressing(SHS/PHIP). The influences of pressing processes (delay time, high pressure and high pressure time) on density of TiC-Al₂O₃-20Fe cermets was researched. The composition, microstructure and properties of the products were analyzed. The results show that, in the process of preparing TiC-Al₂O₃-20Fe cermet by SHS/PHIP, the release of gases and the existence of the liquid are the important factors. The products consist of TiC and Al₂O_{3 particles and quasi continuous Fe binder phase. The interfacial bonding between Fe and Al2O3 is very smooth. A thin diffusion layer was found between Fe and TiC. Transverse rupture strength and compressive strength are approximately 890MPa and 18.4GPa.}