DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: 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:
 [1];  [2];  [1];  [2]
  1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  2. 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 = {2014},
month = {10}
}

Journal Article:

Citation Metrics:
Cited by: 8 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Conference Report on the 2nd International Symposium on Lithium Applications for Fusion Devices
journal, February 2012


Plasma facing surface composition during NSTX Li experiments
journal, July 2013


Results and future plans of the Lithium Tokamak eXperiment (LTX)
journal, July 2013


Lithium wall conditioning for fuel and impurity control
journal, June 1996


Deuterium retention in liquid lithium
journal, October 2002


The role of oxygen in the uptake of deuterium in lithiated graphite
journal, December 2013

  • Taylor, C. N.; Dadras, J.; Luitjohan, K. E.
  • Journal of Applied Physics, Vol. 114, Issue 22
  • DOI: 10.1063/1.4841115

Design and performance of a versatile, cost-effective microwave electron cyclotron resonance plasma source for surface and thin film processing
journal, February 2000

  • Anton, R.; Wiegner, Th.; Naumann, W.
  • Review of Scientific Instruments, Vol. 71, Issue 2
  • DOI: 10.1063/1.1150420

Growth and decomposition of lithium and lithium hydride on nickel
journal, April 2006


The effects of moisture on LiD single crystals studied by temperature-programmed decomposition
journal, June 2001


Observation of Surface Melting
journal, January 1985


Works referencing / citing this record:

Reactor plasma facing component designs based on liquid metal concepts supported in porous systems
journal, November 2016