A thermal desorption spectroscopy study of hydrogen trapping in polycrystalline α-uranium
Abstract
The kinetics of hydrogen desorption from polycrystalline α-uranium (α-U) was examined using thermal desorption spectroscopy (TDS). The goal was to identify the major trap sites for hydrogen and their associated trap energies. In polycrystalline α-U six TDS adsorption peaks were observed at temperatures of 521 K, 556 K, 607 K, 681 K, 793 K and 905 K. In addition, the desorption was determined to be second order based on peak shape. The position of the first three peaks was consistent with desorption from UH3. To identify the trap site corresponding to the high temperature peaks the data were compared to a plastically deformed sample and a high purity single crystal sample. The plastically deformed sample allowed the identification of trapping at dislocations while the single crystal sample allow for the identification of high angle boundaries and impurities. Thus, with respect to the desorption energy associated with each peak, values between 12.9 and 26.5 kJ/mole were measured.
- Authors:
-
- Univ. of Akron, Akron, OH (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1227462
- Alternate Identifier(s):
- OSTI ID: 1432083
- Report Number(s):
- LA-UR-14-28252
Journal ID: ISSN 0022-3115; PII: S0022311515001695
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Nuclear Materials
- Additional Journal Information:
- Journal Volume: 461; Journal Issue: C; Journal ID: ISSN 0022-3115
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; 36 MATERIALS SCIENCE; alpha uranium; hydride; trap site; thermal desorption spectroscopy; TDS; activation energy; single crystal
Citation Formats
Lillard, R. S., and Forsyth, R. T. A thermal desorption spectroscopy study of hydrogen trapping in polycrystalline α-uranium. United States: N. p., 2015.
Web. doi:10.1016/j.jnucmat.2015.03.023.
Lillard, R. S., & Forsyth, R. T. A thermal desorption spectroscopy study of hydrogen trapping in polycrystalline α-uranium. United States. https://doi.org/10.1016/j.jnucmat.2015.03.023
Lillard, R. S., and Forsyth, R. T. Sat .
"A thermal desorption spectroscopy study of hydrogen trapping in polycrystalline α-uranium". United States. https://doi.org/10.1016/j.jnucmat.2015.03.023. https://www.osti.gov/servlets/purl/1227462.
@article{osti_1227462,
title = {A thermal desorption spectroscopy study of hydrogen trapping in polycrystalline α-uranium},
author = {Lillard, R. S. and Forsyth, R. T.},
abstractNote = {The kinetics of hydrogen desorption from polycrystalline α-uranium (α-U) was examined using thermal desorption spectroscopy (TDS). The goal was to identify the major trap sites for hydrogen and their associated trap energies. In polycrystalline α-U six TDS adsorption peaks were observed at temperatures of 521 K, 556 K, 607 K, 681 K, 793 K and 905 K. In addition, the desorption was determined to be second order based on peak shape. The position of the first three peaks was consistent with desorption from UH3. To identify the trap site corresponding to the high temperature peaks the data were compared to a plastically deformed sample and a high purity single crystal sample. The plastically deformed sample allowed the identification of trapping at dislocations while the single crystal sample allow for the identification of high angle boundaries and impurities. Thus, with respect to the desorption energy associated with each peak, values between 12.9 and 26.5 kJ/mole were measured.},
doi = {10.1016/j.jnucmat.2015.03.023},
journal = {Journal of Nuclear Materials},
number = C,
volume = 461,
place = {United States},
year = {Sat Mar 14 00:00:00 EDT 2015},
month = {Sat Mar 14 00:00:00 EDT 2015}
}
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Works referencing / citing this record:
Helium self-trapping and diffusion behaviors in deformed 316L stainless steel exposed to high flux and low energy helium plasma
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