Abstract

In the present study, the effect of Hf and Ti substitution of Zr in the ZrCo alloy, used for hydrogen isotope storage, has been investigated in order to ascertain the improvement of the anti-disproportionation property of ZrCo hydrides. The ultimate goal of the investigation is to develop a safe and economically viable solution for the long-term storage of deuterium and tritium. The intermetallic compounds Zr_l-xTi_xCo and Zr_l-xHf_xCo (x = 0.1, 0.2) were prepared and their suitability for hydrogen isotope storage, protium (H) and deuterium (D), was investigated. The alloys were synthesized by arc melting under a controlled argon atmosphere and characterized by scanning electron microscope and X-ray diffraction analysis. The hydrogen isotope storage behavior of these alloys was probed by loading and unloading protium and deuterium. We present the pressure, composition, and temperature measurements for desorption, together with the thermodynamic parameters (enthalpy and entropy) of these alloys. The experimental results show that Ti and Hf substitution in the ZrCo alloys is suitable for fast delivery of hydrogen isotopes, even after their long-term storage.

摘要

在本研究中，研究了 Hf 和 Ti 取代 Zr 在用于氢同位素储存的 ZrCo 合金中的影响，以确定 ZrCo 氢化物的抗歧化性能的改善。调查的最终目标是为氘和氚的长期储存开发一种安全且经济可行的解决方案。金属间化合物 Zr _l-x Ti _x Co 和 Zr _l-x Hf _x制备了 Co (x = 0.1, 0.2) 并研究了它们对氢同位素储存、氚 (H) 和氘 (D) 的适用性。合金在可控氩气氛下通过电弧熔化合成，并通过扫描电子显微镜和 X 射线衍射分析进行表征。通过加载和卸载氚和氘来探测这些合金的氢同位素储存行为。我们提供了解吸的压力、成分和温度测量值，以及这些合金的热力学参数（焓和熵）。实验结果表明，即使在长期储存后，ZrCo 合金中的 Ti 和 Hf 替代也适用于氢同位素的快速传递。