Microstructures and Hydrogen Permeability of Nb-Ti-Ni Alloys with High Resistance to Hydrogen Embrittlement

• Hashi Kunihiko

  Department of Materials Science, Kitami Institute of Technology

• Ishikawa Kazuhiro

  Department of Materials Science, Kitami Institute of Technology

• Matsuda Takeshi

  Department of Materials Science, Kitami Institute of Technology

• Aoki Kiyoshi

  Department of Materials Science, Kitami Institute of Technology

抄録

Microstructures and hydrogen permeability (Φ) of as-cast Nb-Ti-Ni alloys have been investigated by scanning electron microscopy (SEM) and by the gas permeation technique, respectively. The Φ value increases with increasing temperature and the amount of the Nb content for every alloy. In these alloys, the Nb₃₉Ti₃₁Ni₃₀ alloy, consisting of the primary bcc-(Nb, Ti) solid solution and the eutectic {(Nb, Ti)+TiNi} phase, shows the highest Φ, which is equivalent to that of Pd. On the other hand, the Nb₁₀Ti₅₀Ni₄₀ alloy, consisting of the primary B2-TiNi compound and the eutectic {(Nb, Ti)+TiNi} phase, shows the lowest Φ value among the alloys for which Φ is measurable. Eutectic microstructures suppress the hydrogen embrittlement, while the primary (Nb, Ti) phase contributes to the hydrogen permeation in these alloys. The present work demonstrates that duplex alloys containing eutectic microstructures are promising for hydrogen permeation membranes with high resistance to the hydrogen embrittlement.

収録刊行物

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 46 (5), 1026-1031, 2005

  公益社団法人 日本金属学会

キーワード

• hydrogen permeation
• hydrogen embrittlement
• TiNi intermetallic
• eutectic structure

詳細情報

• CRID: 1390282679226223488
• NII論文ID: 130004452788
• NII論文ID: 10015702100
• NII書誌ID: AA1151294X
• DOI: 10.2320/matertrans.46.1026
• COI: 1:CAS:528:DC%2BD2MXmtl2mtbY%3D
• ISSN: 13475320
• ISSN: 13459678
• ISSN: http://id.crossref.org/issn/13459678
• NDL書誌ID: 7316418
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7316418
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/46/5/46_5_1026/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可