The corrosion rate of ceramics depend on the solubility of solid in liquid phases which again depends on the composition of both phases as well as on the surface structure in the contact zone. In addition to the solubility, there are corrosion mechanisms, like infiltration and disintegration which is followed by removement of single grains or grain agglomerations into the melt. Having a low solubility of the solid phase, these mechanisms may dominate the corrosion rate. The investigations on infiltrated, textured bodies indicate that modified infiltration mechanisms lead to an improvement of infiltration resistance and stability of shape. These results are discussed. Models are presented to explain the different behaviour of conventional and textured microstructures in melt contact.
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