, Volume 29, Issue 6, pp 1315-1319

Effect of oxidation treatment and surface filming on hydrogen degassing from TiH2

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Abstract

An experiment was carried out to determine the effects of oxidation treatment and surface filming on hydrogen degassing from TiH2 during heating and at fixed temperatures. It was found that surface filming has a stronger effect than oxidation, through which the temperature corresponding to the degassing peak of TiH2 moved from 638 °C to more than 680 °C and the degassing temperature range increased from 125 °C to 150 °C in the heating process. From the degassing measurements at fixed temperatures and the physics model, the diffusion coefficients of hydrogen were determined to be 0.3 to 3.0 times less than that of the original TiH2.