Effects of temperature and surface contamination on D retention in ultrathin Li films on TZM
Abstract
Here in this work, we investigate deuterium retention at the Mo-Li interface by studying thin Li films three monolayers thick on a TZM Mo alloy. Li films at temperatures between 315 and 460 K were exposed to a deuterium ion beam and D retention was measured using temperature programmed desorption. In the absence of oxygen, D is retained as LiD, and the relative amount of retained D decreases with increasing substrate temperature. In three-monolayer thick lithium oxide films, the amount of D retained was 2.5 times higher than the amount retained as LiD in the metallic Li film. However, oxygen reduces the thermal stability of D in the film, causing D2O and D2 to be released from the surface at temperatures 150-200 K below the LiD decomposition temperature. These results highlight the importance of maintaining a metallic Li layer for high D retention in Li films on TZM at elevated temperatures.
- Authors:
-
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Princeton Univ., NJ (United States). Dept. of Chemical and Biological Engineering
- Publication Date:
- Research Org.:
- Princeton Univ., NJ (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- OSTI Identifier:
- 1392558
- Alternate Identifier(s):
- OSTI ID: 1252224
- Grant/Contract Number:
- SC0008598; AC02-09CH11466
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Nuclear Materials
- Additional Journal Information:
- Journal Volume: 463; Journal Issue: C; Journal ID: ISSN 0022-3115
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; deuterium retention; lithium; Li thin films; molybdenum; oxidation
Citation Formats
Capece, A. M., Roszell, J. P., Skinner, C. H., and Koel, B. E. Effects of temperature and surface contamination on D retention in ultrathin Li films on TZM. United States: N. p., 2014.
Web. doi:10.1016/j.jnucmat.2014.10.048.
Capece, A. M., Roszell, J. P., Skinner, C. H., & Koel, B. E. Effects of temperature and surface contamination on D retention in ultrathin Li films on TZM. United States. https://doi.org/10.1016/j.jnucmat.2014.10.048
Capece, A. M., Roszell, J. P., Skinner, C. H., and Koel, B. E. Wed .
"Effects of temperature and surface contamination on D retention in ultrathin Li films on TZM". United States. https://doi.org/10.1016/j.jnucmat.2014.10.048. https://www.osti.gov/servlets/purl/1392558.
@article{osti_1392558,
title = {Effects of temperature and surface contamination on D retention in ultrathin Li films on TZM},
author = {Capece, A. M. and Roszell, J. P. and Skinner, C. H. and Koel, B. E.},
abstractNote = {Here in this work, we investigate deuterium retention at the Mo-Li interface by studying thin Li films three monolayers thick on a TZM Mo alloy. Li films at temperatures between 315 and 460 K were exposed to a deuterium ion beam and D retention was measured using temperature programmed desorption. In the absence of oxygen, D is retained as LiD, and the relative amount of retained D decreases with increasing substrate temperature. In three-monolayer thick lithium oxide films, the amount of D retained was 2.5 times higher than the amount retained as LiD in the metallic Li film. However, oxygen reduces the thermal stability of D in the film, causing D2O and D2 to be released from the surface at temperatures 150-200 K below the LiD decomposition temperature. These results highlight the importance of maintaining a metallic Li layer for high D retention in Li films on TZM at elevated temperatures.},
doi = {10.1016/j.jnucmat.2014.10.048},
journal = {Journal of Nuclear Materials},
number = C,
volume = 463,
place = {United States},
year = {Wed Oct 29 00:00:00 EDT 2014},
month = {Wed Oct 29 00:00:00 EDT 2014}
}
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Works referencing / citing this record:
Reactor plasma facing component designs based on liquid metal concepts supported in porous systems
journal, November 2016
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