Structural characteristics and mechanism of hydrogen-induced disproportionation of the ZrCo alloy

Xiu-mei Guo, Shu-mao Wang, Xiao-peng Liu, Zhi-nian Li, Jian-hua Ye, Hui-ping Yuan, Li-jun Jiang

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    Xiu-mei Guo, Shu-mao Wang, Xiao-peng Liu, Zhi-nian Li, Jian-hua Ye, Hui-ping Yuan, and Li-jun Jiang, Structural characteristics and mechanism of hydrogen-induced disproportionation of the ZrCo alloy, Int. J. Miner. Metall. Mater., 19(2012), No. 11, pp.1010-1015. https://dx.doi.org/10.1007/s12613-012-0662-7
    Xiu-mei Guo, Shu-mao Wang, Xiao-peng Liu, Zhi-nian Li, Jian-hua Ye, Hui-ping Yuan, and Li-jun Jiang, Structural characteristics and mechanism of hydrogen-induced disproportionation of the ZrCo alloy, Int. J. Miner. Metall. Mater., 19(2012), No. 11, pp.1010-1015. https://dx.doi.org/10.1007/s12613-012-0662-7
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    Structural characteristics and mechanism of hydrogen-induced disproportionation of the ZrCo alloy

    • Energy Material and Technology Institute, General Research Institute for Nonferrous Metals, Beijing 100088, China

    基金项目: 

    This work was financially supported by the 2010 International Thermonuclear Experiment Reactor (ITER) Program of China (No.2010GB113003).

      通信作者:

      Xiu-mei Guo E-mail: xiumei418@163.com

    中文摘要

    The intermetallic compound ZrCo was prepared, and its hydrogen-induced disproportionation in hydrogen desorption processes was investigated. The hydrogenation-dehydrogenation thermodynamics of the ZrCo alloy was evaluated by pressure-composition isotherm measurements at different temperatures. The kinetic processes of hydrogen-induced disproportionation at different temperatures under certain pressures were detailedly studied. The disproportionation rate of the ZrCo alloy increased with the increases of temperature and initial hydrogen pressure under experimental conditions. However, the maximum attainable extent of disproportionation did not change much with an increase in temperature or initial hydrogen pressure. The crystallographic structure analysis of the ZrCo alloy combining with its corresponding dehydrogenation kinetic curves under the conditions of an initial hydrogen pressure of 0.2 MPa and a temperature of 723 K indicated that the basic process of disproportionation reactions was composed of four stages:rapid dehydrogenation of ZrCoH3, equilibrium of dehydrogenation, simultaneity of dehydrogenation and disproportionation, and completion of disproportionation.

     

    Structural characteristics and mechanism of hydrogen-induced disproportionation of the ZrCo alloy

    Author Affilications

      • Energy Material and Technology Institute, General Research Institute for Nonferrous Metals, Beijing 100088, China

    • Funds: 

      This work was financially supported by the 2010 International Thermonuclear Experiment Reactor (ITER) Program of China (No.2010GB113003).

    • Received: 05 January 2012; Revised: 05 April 2012; Accepted: 11 April 2012;
    The intermetallic compound ZrCo was prepared, and its hydrogen-induced disproportionation in hydrogen desorption processes was investigated. The hydrogenation-dehydrogenation thermodynamics of the ZrCo alloy was evaluated by pressure-composition isotherm measurements at different temperatures. The kinetic processes of hydrogen-induced disproportionation at different temperatures under certain pressures were detailedly studied. The disproportionation rate of the ZrCo alloy increased with the increases of temperature and initial hydrogen pressure under experimental conditions. However, the maximum attainable extent of disproportionation did not change much with an increase in temperature or initial hydrogen pressure. The crystallographic structure analysis of the ZrCo alloy combining with its corresponding dehydrogenation kinetic curves under the conditions of an initial hydrogen pressure of 0.2 MPa and a temperature of 723 K indicated that the basic process of disproportionation reactions was composed of four stages:rapid dehydrogenation of ZrCoH3, equilibrium of dehydrogenation, simultaneity of dehydrogenation and disproportionation, and completion of disproportionation.

     

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