MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Solidification Process and Mechanical Behavior of the Nb/Nb5Si3 Two Phase Alloys in the Nb-Ti-Si System
Nobuaki SekidoYoshisato KimuraSeiji MiuraYoshinao Mishima
Author information
JOURNALS FREE ACCESS

2004 Volume 45 Issue 12 Pages 3264-3271

Details
Abstract

Design of two-phase alloys consisting of niobium solid solution (A2) and α-Nb5Si3 (D8l) phases in the Nb-Ti-Si ternary system is pursued for ultra-high temperature structural applications. Compositional and annealing conditions are determined for the formation of A2/D8l lamellar microstructure via eutectoid decomposition of Nb3Si (tP32) phase in the Nb-Si binary and Nb-Ti-Si ternary system. Addition of titanium is found to result in increased room temperature toughness, but decreased high temperature strength. Enhancement of mechanical properties is achieved by applying the directional solidification technique. Mechanical properties of the alloys are discussed from microstructural point of view.

Information related to the author
© 2004 The Japan Institute of Metals and Materials
Previous article Next article
feedback
Top