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Microstructural characterization and hydrogenation performance of ZrxV5Fe(x=3-9) alloys

Progress in Natural Science:Materials International 2020年第2期30卷 229-238页

作者： Haiyan Leng Pan Yan Xingbo Han Wei Liu Qihang Liu Qian Li State Key Laboratory of Advanced Special Steels & Shanghai Key Laboratory of Advanced Ferrometallurgy & School of Materials Science and Engineering Shanghai University Shanghai Institute of Applied Physics Chinese Academy of Sciences

ZrxV5Fe(x=3,5,7,8,9) alloys were designed to investigate the influence of Zr addition on hydrogenation *** alloys were prepared by arc melting and then annealed at 1273 K for 168 *** results showed that the alloys were composed of α-Zr and C15-ZrV2 *** cell volume of C15-ZrV2phase firstly increased and then decreased as the content of Zr increased,while the reversed trend was found for the cell volume of α-Zr phase,which was related to the stoichiometric ratio of elements.α-Zr phase distributed in C15-ZrV2 phase matrix in ZrxV5Fe(x=5,7,8,9) alloys,among which Zr7 V5 Fe alloy showed the best *** PCT curves of the alloys under 623 K,673 K and 723 K showed that the hydrogen absorption plateau pressure of the phases in different alloys decreased gradually with the increasing content of *** C15-ZrV2 phase in Zr7 V5 Fe alloy had the lowest hydrogen absorption plateau pressure at room temperature,which was consistent with the change tendency of the corresponding cell ***,the kinetic curves of hydrogen absorption at 623 K revealed that Zr7 V5 Fe alloy with the smallest average particle size and the largest phase boundary area showed the fastest hydrogen absorption *** with other four alloys(including St707 alloy),Zr7V5Fe alloy is more suitable for the use of getter.

关键词： Non-evaporative getter Hydriding and dehydriding properties Cell volume hydrogen absorption dynamics Plateau pressure

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