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High-temperature oxidation of titanium-hydride powders

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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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Authors and Affiliations

  1. The Institute for Materials Science Problems, Academy of Sciences, Ukrainian SSR, Kiev, USSR

    V. A. Lavrenko

  2. Kiev Polytechnical Institute, Kiev, USSR

    V. Zh. Shemet

  3. The Institute of Metallurgy, Academy of Sciences, USSR, Moscow, USSR

    L. A. Petrov & O. A. Teplov

  4. The Institute for Chemical Physics, Academy of Sciences, Armenian SSR, Yerevan, USSR

    S. K. Dolukhanyan

Authors
  1. V. A. Lavrenko
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  2. V. Zh. Shemet
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  3. L. A. Petrov
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  4. O. A. Teplov
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  5. S. K. Dolukhanyan
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Lavrenko, V.A., Shemet, V.Z., Petrov, L.A. et al. High-temperature oxidation of titanium-hydride powders. Oxid Met 33, 177–189 (1990). https://doi.org/10.1007/BF00665675

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  • DOI: https://doi.org/10.1007/BF00665675

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