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Title: Production of near-full density uranium nitride microspheres with a hot isostatic press

Abstract

Depleted uranium nitride (UN) kernels with diameters ranging from 420 to 858 microns and theoretical densities (TD) between 87 and 91 percent were postprocessed using a hot isostatic press (HIP) in an argon gas media. This treatment was shown to increase the TD up to above 97%. Uranium nitride is highly reactive with oxygen. Therefore, a novel crucible design was implemented to remove impurities in the argon gas via in situ gettering to avoid oxidation of the UN kernels. The density before and after each HIP procedure was calculated from average weight, volume, and ellipticity determined with established characterization techniques for particle. Furthermore, micrographs confirmed the nearly full densification of the particles using the gettering approach and HIP processing parameters investigated in this work.

Authors:
ORCiD logo [1];  [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1456813
Alternate Identifier(s):
OSTI ID: 1439484
Grant/Contract Number:  
AC05-00OR22725; DE‐AC05‐00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the American Ceramic Society
Additional Journal Information:
Journal Volume: 101; Journal Issue: 10; Journal ID: ISSN 0002-7820
Publisher:
American Ceramic Society
Country of Publication:
United States
Language:
English
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; densification; hot isostatic pressing; oxidation; uranium/uranium compounds

Citation Formats

McMurray, Jacob W., Kiggans, Jr., Jim O., Helmreich, Grant W., and Terrani, Kurt A. Production of near-full density uranium nitride microspheres with a hot isostatic press. United States: N. p., 2018. Web. doi:10.1111/jace.15766.
McMurray, Jacob W., Kiggans, Jr., Jim O., Helmreich, Grant W., & Terrani, Kurt A. Production of near-full density uranium nitride microspheres with a hot isostatic press. United States. doi:10.1111/jace.15766.
McMurray, Jacob W., Kiggans, Jr., Jim O., Helmreich, Grant W., and Terrani, Kurt A. Mon . "Production of near-full density uranium nitride microspheres with a hot isostatic press". United States. doi:10.1111/jace.15766. https://www.osti.gov/servlets/purl/1456813.
@article{osti_1456813,
title = {Production of near-full density uranium nitride microspheres with a hot isostatic press},
author = {McMurray, Jacob W. and Kiggans, Jr., Jim O. and Helmreich, Grant W. and Terrani, Kurt A.},
abstractNote = {Depleted uranium nitride (UN) kernels with diameters ranging from 420 to 858 microns and theoretical densities (TD) between 87 and 91 percent were postprocessed using a hot isostatic press (HIP) in an argon gas media. This treatment was shown to increase the TD up to above 97%. Uranium nitride is highly reactive with oxygen. Therefore, a novel crucible design was implemented to remove impurities in the argon gas via in situ gettering to avoid oxidation of the UN kernels. The density before and after each HIP procedure was calculated from average weight, volume, and ellipticity determined with established characterization techniques for particle. Furthermore, micrographs confirmed the nearly full densification of the particles using the gettering approach and HIP processing parameters investigated in this work.},
doi = {10.1111/jace.15766},
journal = {Journal of the American Ceramic Society},
number = 10,
volume = 101,
place = {United States},
year = {2018},
month = {5}
}

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Works referenced in this record:

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