Thermal stability of in situ synthesized high temperature titanium matrix composites

• Published in: Journal of alloys and compounds Vol. 467; no. 1; pp. 135 - 141
• Main Authors: Xiao, Lv, Lu, Wei Jie, Li, Yun Gang, Qin, Ji Ning, Zhang, Di
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 07.01.2009; Elsevier
• Subjects: Applied sciences; Dispersion hardening metals; Elasticity. Plasticity; Exact sciences and technology; Mechanical properties; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metal matrix composites; Metals. Metallurgy; Microstructure; Powder metallurgy. Composite materials; Production techniques; Mechanical properties; Microstructure; Metal matrix composites; Titanium alloy; Metal matrix composite; Ductility; Tensile property; High temperature; Composite material; Dispersion strengthened metal; Thermal stability; Lanthanum oxide; Casting; Titanium boride
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2007.11.096

TiB and La 2O 3 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 Ti 3Al agglomeration.