Abstract
The interfacial properties between liquid Fe-O alloy and alumina substrates with different purities, 99.9% and 96% Al 2 O 3 , were measured by the sessile drop method. The interfaces of samples were examined by SEM and EPMA after the experiment. It was found that the surface tension decreased with increasing oxygen concentration in the iron for both substrates. The contact angle of 99.9% Al 2 O 3 abruptly increased with increasing oxygen concentration at lower oxygen concentrations. These phenomena were attributed to the dissociation of Al 2 O 3
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