Paper Title:
Hydrogen Permeation Properties of Nb-Based Two-Phase Compounds
  Abstract

Nb-NiTi and Nb-CoTi eutectic alloys were directionally solidified in an optical floating zone furnace. Rod-type eutectic structures with Nb rods aligned parallel to the growth direction are obtained for Nb-41Ni-40Ti grown at relatively slow growth rates below 1.0mm/h, while lamellar-type eutectic structures are obtained for Nb-35Co-34Ti grown at the same condition. The hydrogen permeability for the Nb-41Ni-40Ti DS alloy with Nb rods perpendicular to the membrane surface is 2.60×10-8mol H2 m-1 Pa-1/2 at 673K, which is about 2.5 times higher than that of as-cast sample. No hydrogen embrittlement is observed between 573 and 673K, indicating that the Nb-NiTi rod-type eutectic structure effectively suppresses the hydrogen embrittlement of Nb during hydrogen permeation.

  Info
Periodical
Materials Science Forum (Volumes 561-565)
Main Theme
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
467-470
DOI
10.4028/www.scientific.net/MSF.561-565.467
Citation
Y. Yamaguchi, K. Kishida, K. Tanaka, H. Inui, S. Tokui, K. Ishikawa, K. Aoki, "Hydrogen Permeation Properties of Nb-Based Two-Phase Compounds", Materials Science Forum, Vols. 561-565, pp. 467-470, 2007
Online since
October 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Yoshisato Kimura, Kiichi Sakai, Shinya Teramoto, Yoshinao Mishima
Abstract:Aiming for further improvement of mechanical properties of Co3AlC-based heat resistant alloys, microstructure control was conducted using...
833
Authors: Lidia Lityńska-Dobrzyńska, Patrick Ochin, Anna Góral, Marek Faryna, Jan Dutkiewicz
Abstract:The effect of rapid solidification on the microstructure of Al-Zn-Mg-Cu alloys with 8 wt.% Zn-2 wt.% Mg-2.3 wt.% Cu and 0.2 or 0.5 wt.% of Zr...
42
Authors: Timothy Wong, Z. Yu, K. Suzuki, M.A. Gibson, K. Ishikawa, K. Aoki
Abstract:Nb/NiZr composite alloy membranes have been reported to have hydrogen permeabilities higher than that of pure Pd. Since the hydrogen...
2839
Authors: Yang Huan Zhang, Xiao Gang Liu, Le Le Chen, Hui Ping Ren, Guo Fang Zhang, Dong Liang Zhao
Chapter 8: Energy Materials
Abstract:The nanocrystalline and amorphous Mg2Ni-type Mg20Ni10-xMnx (x = 0, 1, 2, 3, 4) alloys were synthesized by melt-spinning technique. The...
3420
Authors: György Thalmaier, Ioan Vida-Simiti, N. Jumate, Viorel Aurel Şerban, C. Codrean, Mircea Nicoară, L. Bukkosi
Chapter 1: Advanced Materials
Abstract:Nickel–titanium- group 5A metal (V, Nb, Ta, Zr) alloys are known as promising hydrogen-selective membrane materials. They can potentially be...
41