The Influence of Sintering Temperature and Composition on Mechanical Properties of Al2O3-TiC Composites.

Al₂O₃-TiC composites were prepared by hot-pressing with α- Al₂O₃ and TiC as raw materials. Effects of sintering temperature and TiC content on microstructure and mechanical properties have been systematically studied. The results indicate that there is no chemical reaction between α- Al₂O₃ and TiC, which suggests that they have fine chemical compatibility. The introducing TiC is benefitial to improve mechanical properties of Al₂O₃-TiC composites. The Al₂O₃-20% TiC composite sintered at 1, 600 °C obtained the highest bending strength and fracture toughness (509MPa and 5. 27 MPa ⋅ m^1/2) . The principal fracture mode of composites is intergranular fracture, with transgranular frature. [ABSTRACT FROM AUTHOR]