Fabrication of Al2O3-Ni Composites by Pressureless Sintering

Abstract

Al₂O₃-Ni composites were prepared by pressureless sintering. Nickel was used as a reinforcing material. The purposes of this work are to improve the fracture toughness of the ordinary alumina with nickel additions and to investigate the effect of nickel on the characteristics and mechanical properties of Al2O3-Ni composites. The compositions were changed with different amount of nickel additions of 0, 10, 20 and 30 wt% in the composite. As the results, it was revealed that with the increase of nickel, the flexural strength and fracture toughness was increased while hardness decreased.