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Metallurgical and Materials Transactions B
Erschienen in: Metallurgical and Materials Transactions B 4/2008

01.08.2008

Effect of CaF2 on Interfacial Phenomena of High Alumina Refractories with Al Alloy

verfasst von: Pramod Koshy, Sushil Gupta, Veena Sahajwalla, Phil Edwards

Erschienen in: Metallurgical and Materials Transactions B | Ausgabe 4/2008

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Abstract

An experimental study was conducted to investigate the interfacial phenomena between Al-alloy and industrial grade high alumina refractories containing varying contents of CaF2 at 1250 °C. Interfacial reaction products and phases formed in the heat-treated refractory samples were characterized using electron probe microanalysis (EPMA) and X-ray diffraction (XRD), respectively, while interfacial phenomena including dynamic wetting behavior were analyzed using the sessile drop technique. Refractories containing less than 5 wt pct CaF2 showed good resistance to reactions with the molten alloy, due to the dominance of corundum, and the presence of anorthite at the interface. However, with a further increase in the additive content, a glassy matrix of anorthite with CaF2 was formed. Formation of this phase significantly increased the intensity of reactions resulting in the buildup of an interfacial layer. The study thus revealed the strong catalytic effect of CaF2 on reactions of high alumina refractories with Al-alloy.
Vorheriger Artikel Three-Dimensional Numerical Study of Impinging Water Jets in Runout Table Cooling Processes
Nächster Artikel Reaction Behavior and Mechanism during Self-Propagating High-Temperature Synthesis Reaction in an Al-TiO2-B4C System

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Metadaten
Titel
Effect of CaF2 on Interfacial Phenomena of High Alumina Refractories with Al Alloy
verfasst von
Pramod Koshy
Sushil Gupta
Veena Sahajwalla
Phil Edwards
Publikationsdatum
01.08.2008
Verlag
Springer US
Erschienen in
Metallurgical and Materials Transactions B / Ausgabe 4/2008
Print ISSN: 1073-5615
Elektronische ISSN: 1543-1916
DOI
https://doi.org/10.1007/s11663-008-9169-z

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