Acta Metallurgica Sinica (English Letters) ›› 2023, Vol. 36 ›› Issue (7): 1211-1219.DOI: 10.1007/s40195-022-01518-z

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Improved Hydrogen Storage Properties of Ti23V40Mn37 Alloy Doped with Zr7Ni10 by Rapid Solidification

Zhenyu Feng1, Hong Zhong1(), Bin Yang2, Xin Li3, Shuangming Li1   

  1. 1State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, 710072, China
    2Inner Mongolia Metal Material Research Institute, Yantai, 264003, China
    3School of Materials Engineering, Xi’an Aeronautical University, Xi’an, 710077, China
  • Received:2022-10-04 Revised:2022-11-04 Accepted:2022-11-14 Online:2023-07-10 Published:2023-07-04
  • Contact: Hong Zhong

Abstract:

As-cast and rapidly solidified Ti23V40Mn37 alloy doped with Zr7Ni10 was synthesized by arc melting and melt-spinning. The microstructure, activation property, hydrogen absorption kinetics, and hydrogen absorption/desorption thermodynamics were investigated to evaluate a comprehensive hydrogen storage property of the alloys. Both preparation methods had a negligible effect on the lattice parameter of BCC and C14 Laves phases in the alloys. The alloy prepared by melt-spinning showed an increased proportion of BCC phase, larger hydrogen absorption capacity, faster hydrogen absorption rate, and higher hydrogen absorption/desorption platform pressure. The dehydriding enthalpy and endothermic peak temperature of the rapidly solidified alloy were 33.55 ± 2.14 KJ/mol H2 and 526.2 K, respectively, which are smaller than those of the as-cast alloy. It indicates the decreased hydride stability and improved hydrogen desorption property. By contrast with the as-cast alloy, the rapidly solidified alloy showed a preferable comprehensive hydrogen storage property.

Key words: Rapid solidification, Microstructure, Hydrogen absorption kinetics, Hydrogen desorption property