Oxidation Behaviour of SiC and TiC Particulate Reinforced Ti3Al Intermetallic Matrix Composites

Abstract

Oxidation behaviours of SiC and TiC particulate reinforced Ti 3 Al intermetallic matrix composites at 700-800°C have been studied. The results showed that composites had lower oxidation rates than the cast Ti 3 Al . The most encouraging improvement is that they all possess excellent scale spallation resistance, no spallation could be observed from the composite specimens during all tests. Based on SEM and XRD results, the mechanisms of oxidation and spallation for these composites were discussed briefly.