Abstract
Al 2O 3–TiC composites with a content of 30 wt% TiC with various size of starting powders were manufactured by hot pressing. The Vickers hardness, bending strength and fracture toughness were studied. The experiment results show that the starting powder size has a significant effect on the properties of the Al 2O 3–TiC composites. The maximum bending strength of the submicron Al 2O 3 with the fine TiC powders addition is 712 MPa, while the maximum fracture toughness of the same Al 2O 3 matrix with the large TiC powders addition is 6.5 MPa m 1/2.
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