High-temperature oxidation of titanium-hydride powders |
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| Authors: | V. A. Lavrenko V. Zh. Shemet L. A. Petrov O. A. Teplov S. K. Dolukhanyan |
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| Affiliation: | (1) The Institute for Materials Science Problems, Academy of Sciences, Ukrainian SSR, Kiev, USSR;(2) Kiev Polytechnical Institute, Kiev, USSR;(3) The Institute of Metallurgy, Academy of Sciences, USSR, Moscow, USSR;(4) The Institute for Chemical Physics, Academy of Sciences, Armenian SSR, Yerevan, USSR |
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| Abstract: | ![]()
The oxidation kinetics of titanium-hydride powders were studied in the temperature range of 298–1378 K in air at atmospheric pressure. DTA, DSC, X-ray analysis, and scanning electron microscopy were used. Oxidation was found to take place by TiHxOy oxyhydride phases formation. The oxidation reaction rate at temperatures above 870 K was limited by diffusion of oxygen atoms through a rutile scale formed on the surface. The activation energy and preexponential values of the Arrhenius equation for different interaction stages as well as transformation enthalpies were calculated. |
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| Keywords: | kinetics oxidation titanium hydride rutile |
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