The ability for wetting of the melts of several oxides CaO, MgO, SrO, Al2O3, Y2O3, Sc2O3, and Ln2O3 oxides of the group (for example, Er2O3), and oxide systems was analyzed towards silicon carbide. Equilibrium wetting angles at 1900 °C are calculated; the results prove that in such conditions the surface of SiC solid phase is sufficiently wetted by ternary eutectic melts of the mentioned oxides, i. e. CaO-Al2O3-Y2O3 и MgO-Al2O3-Y2O3. This makes such eutectics candidate sintering aids in liquid-phase sintering of SiC-based ceramics.
silicon carbide, eutectic additive, surface tension, wetting angle
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