Relationship between microstructure and hydrogen permeation properties in the multiphase Ni21Ti23Nb56 alloy membranes

Title
Relationship between microstructure and hydrogen permeation properties in the multiphase Ni21Ti23Nb56 alloy membranes
Authors
Edoardo MagnoneSung Il JeonJung Hoon Park에릭플러리
Keywords
membrane; Ni-Ti-Nb system; microstructure; scanning electron microscopy; hydrogen permeation
Issue Date
2011-11
Publisher
Journal of membrane science
Citation
VOL 384, NO 1-2, 136-141
Abstract
The cooling rate has significant effects on the microstructure of Ti-Ni-Nb-based multiphase alloys. In the present study the effect of the microstructure on the hydrogen permeation properties of multiphase Ni21Ti23Nb56 alloy membrane was systematically investigated. Our result suggested a complementary relation between the quantity of the primary bcc-(Ti, Nb) solid solution phase and hydrogen permeation properties. The Ni21Ti23Nb56 alloy with about 70% surface fraction of primary phase bcc-(Nb-Ti) solid solution showed the higher hydrogen permeability value of 7.48 ×10−8 mol/m s Pa1/2 at 450 ℃, which is higher in value compared to Ti-Ni-Nb-based multiphase alloys reported in published works. Moreover, comparison between the present experimental data and the literature was analyzed to illustrate the capability of the proposed control of microstructure membrane for the improvement of the hydrogen permeation properties of Ti-Ni-Nb -based multiphase alloys.
URI
http://pubs.kist.re.kr/handle/201004/40843
ISSN
0376-7388
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KIST Publication > Article
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