Hydrogen permeability and mechanical properties of NiNb-M (M = Sn, Ti and Zr) amorphous metallic membranes

Tianmiao Lai, Sudhanshu S. Singh, Arun Sundar S Singaravelu, Kaushik Sridhar Vadari, Afsaneh Khosravi, Nikhilesh Chawla, Marylaura Thomas

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

In this paper, we report on the hydrogen permeability at 673 K of 45-μm thick splat-quenched Ni60Nb35M5 (M = Sn, Ti and Zr) amorphous metallic membranes. Changes in mechanical properties, induced by hydrogen, were evaluated by nanoindentation. The effect of different elemental substitutions on both the hydrogen permeability and the thermal stability are discussed. Membrane crystalline structure was probed with X-ray diffraction and membrane thermal properties were analyzed with differential scanning calorimetry. The Young's modulus and hardness changes of the membranes were measured by nanoindentation. All of these ternary Ni-Nb membranes maintain their amorphous structure after 24 h of hydrogen permeability testing at 673 K. The Ni60Nb35Zr5 alloy membranes exhibited a hydrogen permeability of 10-10 mol m-1 s-1 Pa-0.5, the maximum of the three compositions tested. The hydrogen permeability declined slightly with time during the testing. Overall the amorphous metallic membranes were thermally stable and maintained their amorphous structure. A decrease in free volume is hypothesized to be the reason for i) the increase of Young's modulus and hardness; ii) hydrogen permeability decrease over time.

Original languageEnglish (US)
Pages (from-to)359-365
Number of pages7
JournalJournal of Alloys and Compounds
Volume684
DOIs
StatePublished - Nov 5 2016

Keywords

  • Amorphous metallic membrane
  • Continuous measurement of stiffness
  • Free volume
  • Hydrogen permeability
  • Nanoindentation
  • Thermal stability

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

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