Competing High-Temperature Deformation Mechanisms in Mo(Si,Al)2–Al2O3 Composites

Mo(Si,Al) 2 –Al 2 O 3 composites were tested in four-point bending at 1300 °C. The addition of Al 2 O 3 led to a decrease in grain size, and a subsequent decrease in strength for materials containing up to 15 wt pct Al 2 O 3 . At higher Al 2 O 3 fractions, the decrease in grain size saturates and th...

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Veröffentlicht in:	Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2024-09, Vol.55 (9), p.3220-3225
Hauptverfasser:	Edgren, Aina, Ström, Erik, Colliander, Magnus Hörnqvist
Format:	Artikel
Sprache:	eng
Schlagworte:	Aluminum oxide Brief Communication Characterization and Evaluation of Materials Chemistry and Materials Science Composite materials Deformation Deformation mechanisms Fractions Furnaces Grain boundaries Grain boundary sliding Grain growth Grain size High temperature Investigations Materials Science Mechanical properties Metallic Materials Molybdenum Nanotechnology Silicon Sintering Structural Materials Surfaces and Interfaces Thin Films Yield stress
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Zusammenfassung:	Mo(Si,Al) 2 –Al 2 O 3 composites were tested in four-point bending at 1300 °C. The addition of Al 2 O 3 led to a decrease in grain size, and a subsequent decrease in strength for materials containing up to 15 wt pct Al 2 O 3 . At higher Al 2 O 3 fractions, the decrease in grain size saturates and the strength is recovered as the Al 2 O 3 particles prevent grain boundary sliding.
ISSN:	1073-5623 1543-1940
DOI:	10.1007/s11661-024-07520-7