Effect of interfacial reaction on the thermal expansion behavior of β-eucryptite particle and aluminum borate whisker reinforced 6061 aluminum alloy composite
A new aluminum matrix composite containing β-eucryptite particles and aluminum borate whiskers was obtained by a squeeze casting technique. This composite exhibits a low coefficient of thermal expansion (CTE) and high strength. The interfacial reactions on both the surface of β-eucryptite particle a...
Gespeichert in:
Veröffentlicht in: | Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2002-10, Vol.336 (1), p.110-116 |
---|---|
Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | A new aluminum matrix composite containing β-eucryptite particles and aluminum borate whiskers was obtained by a squeeze casting technique. This composite exhibits a low coefficient of thermal expansion (CTE) and high strength. The interfacial reactions on both the surface of β-eucryptite particle and the surface of aluminum borate whisker in the composite were studied by transmission electron microscopy and X-ray diffraction. The effect of interfacial reaction on the CTE of the composite was investigated in detail. The results indicate that the interfacial reaction product on the surface of β-eucryptite particle is Mg
2SiO
4 (forsterite). The solution treatment at 520
°C has little effect on the interfacial reaction on the aluminum borate whisker, but the degree of interfacial reaction on the surface of β-eucryptite particle increases with solution treatment time. The coefficient of thermal expansion of the composite is affected greatly by the degree of interfacial reaction on the surface of β-eucryptite particle. |
---|---|
ISSN: | 0921-5093 1873-4936 |
DOI: | 10.1016/S0921-5093(01)01981-5 |