KEM 2009 DOI: 10.4028/www.scientific.net/kem.409.260 View full text
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Dagmar Galusková, Monika Kašiarová, Miroslav Hnatko, Dušan Galusek, Pavol Šajgalík, Ján Dusza

Abstract: The present work studies the corrosion of three most widely used types of structural ceramics – silicon nitride, solid state sintered alumina and liquid phase sintered alumina – in 3 % aqueous solutions of sodium chloride at temperatures up to 290 °C and pressures up to 7 MPa. The corrosion of silicon nitride was controlled by attack of Si3N4 matrix grains, while yttrium oxynitride amorphous grain boundary phase was corrosion resistant. Corrosion of Si3N4 in reference media -distilled water - at 290 °C was cha…

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