Abstract ZrxV5Fe(x = 3, 5, 7, 8, 9) alloys were designed to investigate the influence of Zr addition on hydrogenation performance. The alloys were prepared by arc melting and then annealed at 1273K for 168 h. The results showed that the alloys were composed of α-Zr and C15–ZrV2 phases. The cell volume of C15–ZrV2 phase 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 Zr7V5Fe alloy showed the best distribution. The 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 Zr. However C15–ZrV2 phase in Zr7V5Fe alloy had the lowest hydrogen absorption plateau pressure at room temperature, which was consistent with the change tendency of the corresponding cell volume. Moreover, the kinetic curves of hydrogen absorption at 623 K revealed that Zr7V5Fe alloy with the smallest average particle size and the largest phase boundary area showed the fastest hydrogen absorption kinetics. Compared with other four alloys(including St707 alloy), Zr7V5Fe alloy is more suitable for the use of getter.

中文翻译：

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ZrxV5Fe(x=3-9)合金的显微组织表征及加氢性能

摘要 设计ZrxV5Fe(x = 3, 5, 7, 8, 9)合金以研究Zr添加对加氢性能的影响。合金通过电弧熔化制备，然后在 1273K 下退火 168 小时。结果表明合金由α-Zr和C15-ZrV2相组成。C15-ZrV2相的胞体积随着Zr含量的增加先增大后减小，而α-Zr相的胞体积呈相反趋势，这与元素的化学计量比有关。α-Zr 相分布在 ZrxV5Fe(x = 5, 7, 8, 9) 合金的 C15-ZrV2 相基体中，其中 Zr7V5Fe 合金的分布最好。合金在623 K、673 K和723 K下的PCT曲线表明，随着Zr含量的增加，不同合金相的吸氢平台压逐渐降低。而Zr7V5Fe合金中的C15-ZrV2相在室温下吸氢平台压最低，这与相应电池体积的变化趋势一致。此外，623 K吸氢动力学曲线表明，平均粒径最小、相界面积最大的Zr7V5Fe合金吸氢动力学最快。与其他四种合金（包括St707合金）相比，Zr7V5Fe合金更适合吸气剂的使用。623 K吸氢动力学曲线表明，平均粒径最小、相界面积最大的Zr7V5Fe合金吸氢动力学最快。与其他四种合金（包括St707合金）相比，Zr7V5Fe合金更适合吸气剂的使用。623 K吸氢动力学曲线表明，平均粒径最小、相界面积最大的Zr7V5Fe合金吸氢动力学最快。与其他四种合金（包括St707合金）相比，Zr7V5Fe合金更适合吸气剂的使用。