Abstract
A process of high-pressure torsion (HPT) was used to produce an ultrafine-grained Pd–Ag alloy, and to improve mechanical property and hydrogen permeability simultaneously. Hardness values of the HPT-processed sample were much higher than those of a cold-rolled sample which is strengthened by dislocation accumulation. Additionally, in contrast to the degradation of hydrogen permeability in the cold-rolled sample due to a high density of dislocations which act as trapping sites of hydrogen atoms, the hydrogen permeability in the HPT-processed sample was improved due to a high density of high-angle grain boundaries which act as a fast diffusion path. The ultrafine-grained structure in the Pd–Ag alloy was retained during permeation testing at 300 °C due to the addition of silver.
| Original language | English |
|---|---|
| Pages (from-to) | 24176-24182 |
| Number of pages | 7 |
| Journal | International Journal of Hydrogen Energy |
| Volume | 42 |
| Issue number | 38 |
| DOIs | |
| Publication status | Published - Jan 1 2017 |
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All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Condensed Matter Physics
- Energy Engineering and Power Technology
Cite this
Mechanical property and hydrogen permeability of ultrafine-grained Pd–Ag alloy processed by high-pressure torsion. / Iwaoka, Hideaki; Ide, Tatsuya; Arita, Makoto; Horita, Zenji.
In: International Journal of Hydrogen Energy, Vol. 42, No. 38, 01.01.2017, p. 24176-24182.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Mechanical property and hydrogen permeability of ultrafine-grained Pd–Ag alloy processed by high-pressure torsion
AU - Iwaoka, Hideaki
AU - Ide, Tatsuya
AU - Arita, Makoto
AU - Horita, Zenji
PY - 2017/1/1
Y1 - 2017/1/1
N2 - A process of high-pressure torsion (HPT) was used to produce an ultrafine-grained Pd–Ag alloy, and to improve mechanical property and hydrogen permeability simultaneously. Hardness values of the HPT-processed sample were much higher than those of a cold-rolled sample which is strengthened by dislocation accumulation. Additionally, in contrast to the degradation of hydrogen permeability in the cold-rolled sample due to a high density of dislocations which act as trapping sites of hydrogen atoms, the hydrogen permeability in the HPT-processed sample was improved due to a high density of high-angle grain boundaries which act as a fast diffusion path. The ultrafine-grained structure in the Pd–Ag alloy was retained during permeation testing at 300 °C due to the addition of silver.
AB - A process of high-pressure torsion (HPT) was used to produce an ultrafine-grained Pd–Ag alloy, and to improve mechanical property and hydrogen permeability simultaneously. Hardness values of the HPT-processed sample were much higher than those of a cold-rolled sample which is strengthened by dislocation accumulation. Additionally, in contrast to the degradation of hydrogen permeability in the cold-rolled sample due to a high density of dislocations which act as trapping sites of hydrogen atoms, the hydrogen permeability in the HPT-processed sample was improved due to a high density of high-angle grain boundaries which act as a fast diffusion path. The ultrafine-grained structure in the Pd–Ag alloy was retained during permeation testing at 300 °C due to the addition of silver.
UR - http://www.scopus.com/inward/record.url?scp=85027710559&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85027710559&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2017.07.235
DO - 10.1016/j.ijhydene.2017.07.235
M3 - Article
AN - SCOPUS:85027710559
VL - 42
SP - 24176
EP - 24182
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 38
ER -