Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 17145-17153 |
| Number of pages | 9 |
| Journal | International Journal of Hydrogen Energy |
| Volume | 41 |
| Issue number | 38 |
| DOIs | |
| Publication status | Published - Oct 2016 |
| MoE publication type | Not Eligible |
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Keywords
- deuterium
- diffusion
- hydrogen
- grain boundaries
- Ni base alloy
- thermal desorption spectrometry
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Role of grain boundaries in the diffusion of hydrogen in nickel base alloy 600 : Study coupling thermal desorption mass spectroscopy with numerical simulation. / Hurley, Caitlin (Corresponding Author); Martin, Frantz; Marchetti, Loïc ; Chêne, Jacques; Blanc, Christine; Andrieu, Eric.
In: International Journal of Hydrogen Energy, Vol. 41, No. 38, 10.2016, p. 17145-17153.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Role of grain boundaries in the diffusion of hydrogen in nickel base alloy 600
T2 - Study coupling thermal desorption mass spectroscopy with numerical simulation
AU - Hurley, Caitlin
AU - Martin, Frantz
AU - Marchetti, Loïc
AU - Chêne, Jacques
AU - Blanc, Christine
AU - Andrieu, Eric
PY - 2016/10
Y1 - 2016/10
N2 - The role grain boundaries play in the diffusion of hydrogen in polycrystalline alloys has long been debated. Some researchers have found that grain boundaries have an accelerating effect on the transport of hydrogen across a metal membrane, while others have stated this network of sites may slow the diffusion of hydrogen or have a mixed effect depending on grain size and orientation. Thermal desorption mass spectroscopy (TDS) was used to study the diffusion of deuterium, from 294 K to 550 K, in model single crystal and polycrystalline nickel base alloy, alloy 600, having a grain size of several tens of micrometers. Using a numerical routine, solving Fick's second law of diffusion, TDS spectra were fit or simulated. The derived diffusion constant parameters (D0 = (1.0 ± 0.5)·10−2 cm2 s−1 and ED = (45 ± 4) kJ mol−1) for the polycrystalline alloy adequately predict and simulate the deuterium desorption from the single crystal during TDS testing. Furthermore, in the temperature range and for the grain size studied no significant effect of grain boundaries on the diffusion of deuterium in alloy 600 was observed. Consequently, the measured diffusion parameters are representative of interstitial diffusion in the alloy.
AB - The role grain boundaries play in the diffusion of hydrogen in polycrystalline alloys has long been debated. Some researchers have found that grain boundaries have an accelerating effect on the transport of hydrogen across a metal membrane, while others have stated this network of sites may slow the diffusion of hydrogen or have a mixed effect depending on grain size and orientation. Thermal desorption mass spectroscopy (TDS) was used to study the diffusion of deuterium, from 294 K to 550 K, in model single crystal and polycrystalline nickel base alloy, alloy 600, having a grain size of several tens of micrometers. Using a numerical routine, solving Fick's second law of diffusion, TDS spectra were fit or simulated. The derived diffusion constant parameters (D0 = (1.0 ± 0.5)·10−2 cm2 s−1 and ED = (45 ± 4) kJ mol−1) for the polycrystalline alloy adequately predict and simulate the deuterium desorption from the single crystal during TDS testing. Furthermore, in the temperature range and for the grain size studied no significant effect of grain boundaries on the diffusion of deuterium in alloy 600 was observed. Consequently, the measured diffusion parameters are representative of interstitial diffusion in the alloy.
KW - deuterium
KW - diffusion
KW - hydrogen
KW - grain boundaries
KW - Ni base alloy
KW - thermal desorption spectrometry
U2 - 10.1016/j.ijhydene.2016.07.038
DO - 10.1016/j.ijhydene.2016.07.038
M3 - Article
VL - 41
SP - 17145
EP - 17153
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 38
ER -