TY - GEN
T1 - Hydrogen permeation and surface characteristics of Pd-coated Ni-Nb-Ta amorphous alloy membrane
AU - Kim, Kwangdong
AU - Kim, Kibae
AU - Kim, Y. C.
AU - Lee, D. Y.
AU - Kim, D. H.
PY - 2006/1/1
Y1 - 2006/1/1
N2 - The hydrogen permeability of a palladium coated Ni60Nb 30Ta10 amorphous alloy was examined in the temperature range of 573-673 K and pressures up to 0.6 MPa. Commercialized Pd 60Cu40 alloy membranes were also evaluated in the same manner. The permeated hydrogen flux increased with increasing temperature and difference in the square-roots of hydrogen pressures on both sides of the membrane. It indicates that the diffusion of hydrogen atoms is the main factor for the hydrogen permeation in this alloy. The maximum hydrogen permeability of the Ni60Nb30Ta10 glassy alloy was 4.1×10-8 [mol/m as Pa1/2] at 673 K, which was much higher than that of Pd60Cu40 membranes measured under the same conditions, 1.9×10-8 [mol/m s Pa1/2] at 673 K. These permeation characteristics imply the possibility of future practical use of the amorphous alloys as the hydrogen permeable membrane. The thickness and compositional variations of sputtered overlayer were measured by using FE-SEM and AES, respectively, to examine the surface characteristics of Pd-coated membranes. The high-quality overlayer was achieved successfully by RF sputtering method.
AB - The hydrogen permeability of a palladium coated Ni60Nb 30Ta10 amorphous alloy was examined in the temperature range of 573-673 K and pressures up to 0.6 MPa. Commercialized Pd 60Cu40 alloy membranes were also evaluated in the same manner. The permeated hydrogen flux increased with increasing temperature and difference in the square-roots of hydrogen pressures on both sides of the membrane. It indicates that the diffusion of hydrogen atoms is the main factor for the hydrogen permeation in this alloy. The maximum hydrogen permeability of the Ni60Nb30Ta10 glassy alloy was 4.1×10-8 [mol/m as Pa1/2] at 673 K, which was much higher than that of Pd60Cu40 membranes measured under the same conditions, 1.9×10-8 [mol/m s Pa1/2] at 673 K. These permeation characteristics imply the possibility of future practical use of the amorphous alloys as the hydrogen permeable membrane. The thickness and compositional variations of sputtered overlayer were measured by using FE-SEM and AES, respectively, to examine the surface characteristics of Pd-coated membranes. The high-quality overlayer was achieved successfully by RF sputtering method.
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U2 - 10.4028/0-87849-995-4.810
DO - 10.4028/0-87849-995-4.810
M3 - Conference contribution
AN - SCOPUS:33847286222
SN - 0878499954
SN - 9780878499953
T3 - Materials Science Forum
SP - 810
EP - 813
BT - Eco-Materials Processing and Design VII - Proceedings of the Conference of the 7th International Symposium on Eco-Materials Processing and Design, ISEPD-7
PB - Trans Tech Publications Ltd
T2 - 7th International Symposium on Eco-Materials Processing and Design, ISEPD-7
Y2 - 8 January 2006 through 11 January 2006
ER -