Hostname: page-component-84b7d79bbc-l82ql Total loading time: 0 Render date: 2024-08-01T00:01:02.275Z Has data issue: false hasContentIssue false
  • English
  • Français

High Hydrogen Permeability in Nb-Ti-Ni Eutectic Alloys Containing Much Primary (Nb, Ti) Phase

Published online by Cambridge University Press:  01 February 2011

Kazuhiro Ishikawa ,
Weimin Luo  and
Kiyoshi Aoki
Kazuhiro Ishikawa
Affiliation:
ishikazu@mail.kitami-it.ac.jp, Kitami Institute of Technology, Materials Science, Koen-cho 165, Kitami, Hokkaido, 090-8507, Japan
Weimin Luo
Affiliation:
dme03803@std.kitami-it.ac.jp, Kitami Institute of Technology, Graduate student, Japan
Kiyoshi Aoki
Affiliation:
alkiky@mail.kitami-it.ac.jp, Kitami Institute of Technology, Materials Science, Japan
Get access

Abstract

Microstructure, crystal structure and hydrogen permeability (Φ) of Nb-Ti-Ni alloys on the straight line connecting the compositions of the eutectic and the primary (Nb, Ti) phase have been investigated to develop the alloys showing high hydrogen permeability with a scanning electron microscope (SEM), an X-ray diffractometer (XRD), and a gas permeation apparatus, respectively. These alloys consist of the B2-TiNi compound and the bcc- (Nb, Ti) solid solution and are hydrogen permeable when they contain much amount of the eutectic phase. The values of Φ for these alloys increase with increasing temperature and Nb content. The Nb68Ti17Ni15 alloy shows the highest Φ of [molH2m−1s−1Pa−0.5] at 673 K, which is 3.1 times higher than that of pure Pd. The present work demonstrates that the alloys showing the high Φ values are obtained on the straight line connecting the compositions of the eutectic and the primary phase.

Keywords

hydrogenationpurificationmicrostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 885: Symposium A – The Hydrogen Cycle – Generation, Storage and Fuel Cells , 2005 , 0885-A09-61
Copyright
Copyright © Materials Research Society 2006

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Kikuchi, E., Catalysis Today 56, 97–101 (2000).Google Scholar
2. Mordkovich, V. Z., Bauchtock, Y. K. and Sosna, M. H., Platinum Metals Rev. 36, 90–97 (1992).Google Scholar
3. Buxbaum, R. E. and Kinney, A. B., Ind. Eng. Chem. Res. 35, 530–537 (1996).Google Scholar
4. Nishimura, C., Komaki, M., Hwang, S. and Amano, M., J. Alloys Compd. 330–332, 902–906 (2002).Google Scholar
5. Shimpo, Y., Yamaura, S., Okouchi, H., Nishida, M., Kajita, O., Kimura, H. and Inoue, A., J. Alloys Compd. 372 197–200 (2004).Google Scholar
6. Hashi, K., Ishikawa, K., Matsuda, T. and Aoki, K., J. Alloys Compd. 368, 215–220 (2004).Google Scholar
7. Hashi, K., Ishikawa, K., Matsuda, T. and Aoki, K., Mater. Trans. 46, 1026–1031 (2005).Google Scholar
8. Luo, W., Ishikawa, K. and Aoki, K., J. Alloys Compd. 407, 115–117 (2006).Google Scholar