Mechanical properties, electric conductivity and oxidation resistance of CNT/Al₂O₃-TiC composite

Abstract

Influence of amount of CNT additive on mechanical properties, electric conductivity and oxidation resistance of CNT/Al₂O₃-TiC composite were investigated. Flexural strength and Young's modulus of the composites were improved by addition of CNT more than 2 vol%. In the composites with CNT more than 3 vol%, the oxidation resistance of the composite was degraded. In comparison with Al₂O₃-26vol%TiC sample as TiC particle-percolated sample, the Al₂O₃-12vol%TiC-3vol%CNT sample, which is TiC particle-nonpercolated sample, shows almost the same mechanical properties and electric conductivity, and also shows thinner oxidized layer after oxidation at 1200°C.