Thermal stability of in situ synthesized high temperature titanium matrix composites

TiB and La2O3 reinforced high temperature titanium matrix composites are in situ synthesized by common casting technology. Microstructure of the matrix alloys and composites before and after thermal exposure are characterized, tensile properties of the specimens are tested. Both the strength and ductility of the composites are enhanced by the reinforcements. Titanium matrix composites show better thermal stability than the matrix alloys because of the reduction of oxygen and microstructure refinement without Ti3Al agglomeration.