Enhancing the Anti-disproportionation Property of ZrCo Alloy for Tritium Storage: Crystal Structure, Dehydrogenation Thermodynamics and Disproportionation Kinetics
HE Hui1, LUO Wenhua1, KOU Huaqin2
1 Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang 621908; 2 Institute of Materials, China Academy of Engineering Physics, Mianyang 621907
Abstract: Owing to excellent hydrogen storage properties and safety characteristics, ZrCo alloy has been selected as an important candidate material for rapid storage and delivery of hydrogen isotopes by the ITER team. However, the hydrogen-induced disproportionation of ZrCo during the hydrogen absorption/desorption processes will cause serious degradation of hydrogen storage properties and has been considered to be the biggest obstacle to its wide application in rapid storage and delivery of hydrogen isotopes. Therefore, it’s extremely significant to improve the anti-disproportionation property of ZrCo. In this paper, progress in research and development on the hydrogen storage properties of ZrCo as well as improving the anti-disproportionation property by element substitution of Hf, Sc, Ti, Ni, Fe are reviewed. Meanwhile, the possible development direction of further improving the anti-disproportionation property of ZrCo is proposed.
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