Phase Equilibrium and High-Temperature Mechanical Properties of Nb–Si–X Ternary Alloys

Phase equilibrium of Nb–Si–X ternary alloys (X = Zr, Ta, Al) was predicted by thermodynamic calculations. Microstructure characterization and phase identification have been performed to investigate the phase equilibrium and validate the prediction. High-temperature compression tests were performed t...

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Bibliographic Details
Published in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2023-12, Vol.54 (12), p.4598-4605
Main Authors: Matsunaga, Sae, Komamura, Kiyoshi, Yamabe-Mitarai, Yoko
Format: Article
Language:English
Subjects:
Alloys
Brief Communication
Characterization and Evaluation of Materials
Chemistry and Materials Science
Compression tests
Equilibrium
High temperature
Materials Science
Mechanical properties
Metallic Materials
Microscopy
Nanotechnology
Niobium
Oxidation
Phase equilibria
Proof stress
Silicides
Silicon
Solid solutions
Spectrum analysis
Structural Materials
Surfaces and Interfaces
Temperature
Ternary alloys
Thin Films
Zirconium
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Summary:Phase equilibrium of Nb–Si–X ternary alloys (X = Zr, Ta, Al) was predicted by thermodynamic calculations. Microstructure characterization and phase identification have been performed to investigate the phase equilibrium and validate the prediction. High-temperature compression tests were performed to evaluate the mechanical properties. All alloys exhibited ssNb, Nb 5 Si 3 , and Nb 3 Si phases. Zr addition increased strength at both room and elevated temperatures. The alloy with large primary silicide islands exhibited a higher 0.2 pct proof stress.
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-023-07220-8