COMBUSTION-ASSISTED SYNTHESIS OF TI-TIB-TIC COMPOSITE VIA THE CASTING ROUTE

A processing method combining conventional melting and combustion synthesis reaction was used to produce Ti-TiB-TiC composite. Simple thermochemical calculations on the reaction system gave the operating "excess moles-initial temperature" regime for making such composites. Room temperature tension tests were performed on the as-cast and the rolled composites. The increase in strength of the rolled composite compared with the as-cast composite was attributed to the absence of dendritic structure. Fractographic examinations were done to observe the fracture behaviour of matrix and precipitated TiB-TiC phase.