Abstract
The aim of aluminium filtration is to remove inclusions such as Al3C4. For inclusions to be removed they have to come in close contact with the filter walls composed of Al2O3 or SiC. It is therefore important that the molten aluminium has close contact with the filter wall. In addition to wetting properties between inclusions (Al4C3) and molten aluminium, the wettability of the filter (SiC) by aluminium is determined in sessile drop studies in the temperature range 1000–1300°C. Wettability changes with time in three successive steps and improves with time. To describe wettability at filtration temperatures employed in the industry of around 700°C, the results will be extrapolated to this temperature in future work.
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