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Wettability and reactivity between molten aluminum and selected oxides

Natalia SOBCZAK 

Foundry Research Institute (FRI), 73 Zakopianska Street, Kraków 30-418, Poland


Nanostructured composites and functionally graded materials based on Al-Al2O3 or AlxMey-Al2O3 systems can be produced in situ by liquid phase processing due to reacting molten aluminum with reactive oxide. In general way such process may be expressed by the following oxy-redox reactions:
2Al+3/yMeOy= Al2O3+3/yMe
(x+2)Al+3/yMeOy= Al2O3+AlxMe3/y
where MeOy is an oxide, which is reactive to Al, and according to widely accepted opinion it should be wettable by molten Al; AlxMe3/y is intermetallic phase.

The paper presents the experimental results on wettability and reactivity in different couples with simple oxide (Al/SiO2, Al/ZnO, Al/B6O, Al/TiO2, Al/ZrO2, Al/CoO, Al/NiO), binary oxides of SiO2-Al2O3 system and complex oxides of SiO2-Al2O3-Fe2O3-TiO2-CaO-MgO type.

The analysis of factors affecting wetting and transformation kinetics in Al/reactive oxide couples has been done taking into account structural, physical and mechanical properties of initial oxide reactant and morphology of resulting microstructures.


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Presentation: poster at E-MRS Fall Meeting 2003, Symposium G, by Natalia SOBCZAK
See On-line Journal of E-MRS Fall Meeting 2003

Submitted: 2003-05-29 10:48
Revised:   2009-06-08 12:55