Mechanical Properties in Hydrogen Atmosphere and Hydrogen Permeability of Nb-W-Ta Alloys for Hydrogen Permeable Membrane

• Watanabe Naoshi

  Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya University

• Yukawa Hiroshi

  Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya University

• Nambu Tomonori

  Department of Materials Science and Engineering, Suzuka National College of Technology

• Matsumoto Yoshihisa

  Department of Mechanical Engineering, Oita National College of Technology

• Zhang Guoxing

  Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya University

• Morinaga Masahiko

  Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya University

Bibliographic Information

Other Title

• 水素透過膜用Ｎｂ‐Ｗ‐Ｔａ合金の水素雰囲気中における機械的性質と水素透過能
• 水素透過膜用Nb-W-Ta合金の水素雰囲気中における機械的性質と水素透過能
• スイソ トウカ マクヨウ Nb W Ta ゴウキン ノ スイソ フンイキ チュウ ニ オケル キカイテキ セイシツ ト スイソ トウカノウ

Abstract

  Pressure-Composition-Isotherm (PCT) measurements, in-situ small punch (SP) tests in hydrogen gas atmosphere and hydrogen permeation tests are conducted for Nb-W-Ta ternary alloys in order to investigate the alloying effects of tantalum on the hydrogen solubility, the mechanical properties and hydrogen permeability of Nb-5 mol%W alloy. It is found that the hydrogen solubilities of Nb-5 mol%W-Xmol%Ta (X=5, 10) alloys are very similar with that of Nb-5 mol%W alloy. Also, the mechanical properties in hydrogen gas atmosphere and hydrogen permeability of the alloys are comparable with Nb-5 mol%W alloy. Therefore, the addition of tantalum scarcely modifies the properties of Nb-5 mol%W alloys. Thus, it is not necessary to take into account the amount of tantalum in Nb-W alloys for hydrogen permeable membrane. In other words, it is not needed to remove tantalum impurity from niobium mineral ores in the course of the refinery process of niobium metal. This means that niobium mineral ore containing high tantalum impurity can be used to reduce the material cost of Nb-W-based hydrogen permeable membranes.<br>

Journal

• Journal of the Japan Institute of Metals and Materials

  Journal of the Japan Institute of Metals and Materials 73 (9), 742-746, 2009

  The Japan Institute of Metals and Materials

Keywords

• hydrogen permeable membrane
• hydrogen purification
• niobium-based alloy
• hydrogen solubility
• hydrogen permeability
• mechanical property

Details

• CRID: 1390001206478139776
• NII Article ID: 10025157405
• NII Book ID: AN00187860
• DOI: 10.2320/jinstmet.73.742
• ISSN: 18806880
• ISSN: 24337501
• ISSN: 00214876
• NDL BIB ID: 10425371
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10425371
• Web Site: https://www.jstage.jst.go.jp/article/jinstmet/73/9/73_9_742/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed