Critical role of initial multi-phase microstructure on the phase transformations during hydrogenation in Fe–Mo alloy system

Rama Srinivas Varanasi, Motomichi Koyama, Reina Utsumi, Hiroyuki Saitoh, Toyoto Sato, Shin ichi Orimo, Eiji Akiyama

研究成果: Article査読

抄録

Given Fe is a low-cost earth-abundant element, there is a need to develop novel Fe-based metal hydrides. The conventional Fe-based hydrides consist of at least one metal with high hydrogen affinity. To synthesize novel low-affinity Fe-based hydrides, the high-pressure and high-temperature method is currently being used. The microstructure is known to influence the de-/hydrogenation processes in metal hydrides. However, in the context of low-affinity Fe-based hydrides, the role of the initial multi-phase microstructure is unknown, which is the objective of the current work. We investigate three as-cast Fe–Mo binary alloys: Fe0.33Mo0.67, Fe0.5Mo0.5, and Fe0.67Mo0.33. Firstly, we first explain in detail the formation mechanisms of the non-equilibrium initial as-cast microstructures caused by the sluggish diffusion of Mo. Subsequently, we present the phase transformations and microstructure evolution during the hydrogenation, depressurization, and aging of Fe–Mo alloys. We demonstrate that each phase in the initial microstructure act as an independent phase during hydrogenation.

本文言語English
ページ(範囲)1418-1434
ページ数17
ジャーナルInternational Journal of Hydrogen Energy
50
DOI
出版ステータスPublished - 2024 1月 2

ASJC Scopus subject areas

  • 再生可能エネルギー、持続可能性、環境
  • 燃料技術
  • 凝縮系物理学
  • エネルギー工学および電力技術

フィンガープリント

「Critical role of initial multi-phase microstructure on the phase transformations during hydrogenation in Fe–Mo alloy system」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル