Kinetics of the oxidation of Ba2 YCu3Ox ceramics
- 1 August 1988
- journal article
- Published by Springer Nature in Journal of Materials Research
- Vol. 3 (4) , 619-625
- https://doi.org/10.1557/jmr.1988.0619
Abstract
The kinetics of the oxidation of dense and porous samples of Ba2 YCu3Ox ceramic have been determined by gravimetric analysis at 400–700 °C. At 600 °C and above, the rate decreases as the thickness of the oxidized layer increases. At 500 °C and below, the kinetics show a linear relation that indicates that the oxidized layer does not protect the ceramic. Dilatometric, microscopic, and high-temperature x-ray data suggest that fractures in the oxide layer at the lower temperatures are caused by the large volume decrease that accompanies the change in oxygen stoichiometry.Keywords
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