Stable region of ZrCo under hydrogen atmosphere at high temperature |
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| Authors: | Huaqin Kou Hui He Wenhua Luo Tao Tang Zhiyong Huang Ge Sang Guanghui Zhang Huan Wang Yan Shi Changan Chen |
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| Affiliation: | 1. Institute of Materials, China Academy of Engineering Physics, P.O. Box 9071-12, Mianyang 621907, China;2. Science and Technology on Surface Physics and Chemistry Laboratory, P.O. Box 9072-35, Mianyang 621908, China;3. State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | In this work, the unusual reproportionation phenomenon, which occurs under hydrogen atmosphere, has been studied for the first time by combing temperature-programmed dehydrogenation and XRD characterization. The phase transition from ZrCo2–ZrH2 to ZrCo for reproportionation was clearly observed without vacuum pumping. It was shown that the reproportionation could take place even under hydrogen pressure of 0.65 bar at 640 °C. In addition, the reproportionation behaviors under different initial hydrogen pressures were investigated and the onset boundary for reproportionation was successfully established. The original insight into the unusual reproportionation phenomenon reveals that there is a stable region for ZrCo under hydrogen atmosphere at high temperature. On the basis of this work, it is hopeful that the application of ZrCo at high temperature will be substantially broadened. |
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| Keywords: | Fusion energy Hydrogen isotopes storage ZrCo Disproportionation Reproportionation |
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