Effects of protide structures on hysteresis in Ti-Cr-V protium absorption alloys

Takuya Tamura, Takashi Kazumi, Atsunori Kamegawa, Hitoshi Takamura, Masuo Okada

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Ti-Cr-V alloys have a higher protium (hydrogen atom) desorption capacity, but a larger hysteresis in the absorption and desorption processes than AB2 and AB5 type protium absorption alloys. It is desirable that the alloys have a smaller hysteresis for the use of hydrogen storage tanks. This paper aims to clarify the effects of protide (hydride) structures on the hysteresis in Ti-Cr-V protium absorption alloys. It was found that the β phases observed after desorbing at the desorption plateau region had the BCC structure for the alloys (Ti:Cr = 2:3) containing less than 70 at%V, but the BCT structure for the alloys (Ti:Cr = 2:3) containing more than 70 at%V. A major reason for the large hysteresis in the Ti-Cr-V alloys appears to be the a-axial contraction in the absorbing process and the a-axial expansion in the desorbing process as opposed to the c-axial changes.

Original languageEnglish
Pages (from-to)2753-2756
Number of pages4
JournalMaterials Transactions
Volume43
Issue number11
DOIs
Publication statusPublished - 2002 Nov

Keywords

  • Body centered cubic
  • Body centered tetragonal
  • Hydride
  • Hydrogen storage alloy
  • Hysteresis
  • Titanium-chromium-vanadium alloy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Effects of protide structures on hysteresis in Ti-Cr-V protium absorption alloys'. Together they form a unique fingerprint.

  • Cite this