Abstract
The oxidation kinetics of zirconium-hydride powders were studied in the temperature range of 298–1378 in air at atmospheric pressure. TG, DTA, DSC, x-ray analysis, and scanning electron microscopy were used. The results obtained are in accordance with the proposed pseudo-parabolic model of zirconium-hydride oxidation. This model includes the initial linear mode of oxide growth with oxygen diffusion through a non-solid film of ZrO2 of variable depth and a stationary diffusion process followed by oxide sintering. It has been established that the activation energy of the limiting stage of oxidation (238.3 kJ/mol) coincides with the activation energy of oxygen self-diffusion in monocline ZrO2.
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Shemet, V.Z., Lavrenko, V.A., Teplov, O.A. et al. High-temperature oxidation of zirconium-hydride powders. Oxid Met 38, 89–98 (1992). https://doi.org/10.1007/BF00665046
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DOI: https://doi.org/10.1007/BF00665046