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Title: Surface Characterization of Depleted Uranium–Molybdenum to Determine Surface Coating Compatibility

Abstract

Scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy have been used to characterize the surface of depleted uranium molybdenum (DU-Mo) alloys as a chemical surrogate to determine potential challenges with the surfaces of manufactured and stored U-Mo foils and powders. Even when stored and shipped in an inert atmosphere, U-Mo has a tenacious surface contamination of oxygen and carbon. The 8 at. % molybdenum (DU-8Mo) powder and 10 at. % molybdenum (DU-10Mo) foil samples have surface contamination of oxygen and carbon in different ratios that is hundreds to thousands of nanometers thick. The DU-8Mo powder sample has been stored in an inert atmosphere and as a result has a lower carbon-to-oxygen ratio at the surface than the DU-10Mo foil sample that was stored in air. This surface contamination has not been removed by up to 20 min of argon ion sputtering nor with 5% hydrogen in argon heat treatment for up to 96 h at 950°C.

Authors:
ORCiD logo [1];  [2];  [1];  [1];  [1]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [3]
  1. Univ. of Utah, Salt Lake City, UT (United States)
  2. Chosun Univ., Gwangju (Korea)
  3. Idaho National Lab. (INL), Idaho Falls, ID (United States)
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1490496
Alternate Identifier(s):
OSTI ID: 1561106
Report Number(s):
INL/JOU-16-40037-Rev000
Journal ID: ISSN 0029-5450
Grant/Contract Number:  
AC07-05ID14517; 25228
Resource Type:
Published Article
Journal Name:
Nuclear Technology
Additional Journal Information:
Journal Volume: 205; Journal Issue: 6; Journal ID: ISSN 0029-5450
Publisher:
Taylor & Francis - formerly American Nuclear Society (ANS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Uranium Molybdenum Alloy; Surface Characterization; XPS; FIB/TEM; SEM; Crystal Structure; Lattice Spacing; Chemical Surface Processing

Citation Formats

Ring, Terry A., Choi, Byung Sang, Perez, J. Paulo, Van Devener, Brian, Polson, Randy C., Crawford, Douglas, Keiser, Dennis, and Wachs, Daniel. Surface Characterization of Depleted Uranium–Molybdenum to Determine Surface Coating Compatibility. United States: N. p., 2018. Web. doi:10.1080/00295450.2018.1542252.
Ring, Terry A., Choi, Byung Sang, Perez, J. Paulo, Van Devener, Brian, Polson, Randy C., Crawford, Douglas, Keiser, Dennis, & Wachs, Daniel. Surface Characterization of Depleted Uranium–Molybdenum to Determine Surface Coating Compatibility. United States. doi:10.1080/00295450.2018.1542252.
Ring, Terry A., Choi, Byung Sang, Perez, J. Paulo, Van Devener, Brian, Polson, Randy C., Crawford, Douglas, Keiser, Dennis, and Wachs, Daniel. Tue . "Surface Characterization of Depleted Uranium–Molybdenum to Determine Surface Coating Compatibility". United States. doi:10.1080/00295450.2018.1542252.
@article{osti_1490496,
title = {Surface Characterization of Depleted Uranium–Molybdenum to Determine Surface Coating Compatibility},
author = {Ring, Terry A. and Choi, Byung Sang and Perez, J. Paulo and Van Devener, Brian and Polson, Randy C. and Crawford, Douglas and Keiser, Dennis and Wachs, Daniel},
abstractNote = {Scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy have been used to characterize the surface of depleted uranium molybdenum (DU-Mo) alloys as a chemical surrogate to determine potential challenges with the surfaces of manufactured and stored U-Mo foils and powders. Even when stored and shipped in an inert atmosphere, U-Mo has a tenacious surface contamination of oxygen and carbon. The 8 at. % molybdenum (DU-8Mo) powder and 10 at. % molybdenum (DU-10Mo) foil samples have surface contamination of oxygen and carbon in different ratios that is hundreds to thousands of nanometers thick. The DU-8Mo powder sample has been stored in an inert atmosphere and as a result has a lower carbon-to-oxygen ratio at the surface than the DU-10Mo foil sample that was stored in air. This surface contamination has not been removed by up to 20 min of argon ion sputtering nor with 5% hydrogen in argon heat treatment for up to 96 h at 950°C.},
doi = {10.1080/00295450.2018.1542252},
journal = {Nuclear Technology},
number = 6,
volume = 205,
place = {United States},
year = {2018},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1080/00295450.2018.1542252

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Works referenced in this record:

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