Properties of (Ti,Nb)Al–(Ti,Nb).sub.5./sub.Si.sub.3./sub. eutectic composite

0342152 - FZÚ 2011 RIV GB eng J - Článek v odborném periodiku
Vojtěch, D. - Lejček, Pavel - Kopeček, Jaromír - Bialasová, K. - Guhlová, P.
Properties of (Ti,Nb)Al–(Ti,Nb)₅Si₃ eutectic composite.
Composite Structures. Roč. 92, č. 6 (2010), s. 1440-1448. ISSN 0263-8223. E-ISSN 1879-1085
Grant CEP: GA AV ČR IAA200100902
Výzkumný záměr: CEZ:AV0Z10100520
Klíčová slova: intermetallic * eutectic * high-temperature material * directional crystallization * oxidation * mechanical properties
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 2.028, rok: 2010

Ti–40Al–5Si and Ti–39Al–5Si–2Nb (in at.%) alloys were studied as prospective high-temperature structural composites consisting of γ-(Ti,Nb)Al + α2-(Ti,Nb)3Al matrix and Ti5Si3 reinforcement. The alloys were prepared by arc melting under helium. Oxidation resistance was studied at 900 °C in air. Thermal stability of alloys was investigated by measuring room temperature hardness and compressive strength after long-term annealing at 900 °C. To prepare oriented composites, directional crystallization at rates of 5–115 mm/h was carried out by the floating zone technique. It was observed that the addition of 2% Nb to the Ti–40Al–5Si alloy does not modify eutectic structure.
Trvalý link: http://hdl.handle.net/11104/0184966