AB2 metal hydrides for high-pressure and narrow temperature interval applications

M. T. Hagström*, J. P. Vanhanen, P. D. Lund

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

22 Citations (Scopus)

Abstract

AB2-based metal hydrides have been studied in order to find high-capacity, low-hysteresis alloy-hydrogen systems for high-pressure applications with strict thermal boundary conditions. TiCrMn1-3xFe2xVx (x=0, 0.05, 0.1, 0.15 or 0.2) and Ti1-yZry(CrzMn1-z)2 (y=0.05 or 0.15 and z=0.5 or 0.6) alloys have been synthesized and characterised by XRD, ICP spectrometry and volumetric PCI measurements. In addition, the PCIs of two commercial (GfE) alloys, Hydralloy C2 and Hydralloy CO, have been measured and a PDSC study on Hydralloy C2 has been performed, in order to assess the feasibility of their basic hydriding properties for narrow temperature interval applications. In the Fe and V containing alloy-hydrogen systems, hysteresis can be overcome at the cost of reduced hydriding capacity, while in the Zr-containing hydrides, at the temperatures of this study (-80 to 60°C), hysteresis is not completely eliminated but the hydriding capacity remains good also at high temperatures. The interplay between these properties of hydrides is discussed, as well as the role of materials characteristics in specially constrained applications.

Original languageEnglish
Pages (from-to)288-293
Number of pages6
JournalJournal of Alloys and Compounds
Volume269
Issue number1-2
DOIs
Publication statusPublished - 1 May 1998
MoE publication typeA1 Journal article-refereed

Keywords

  • AB
  • High-pressure hydride
  • Hysteresis
  • Thermal boundary conditions

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