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

McMurray, Jacob W.; Kiggans, Jr., Jim O.; Helmreich, Grant W.; Terrani, Kurt A.

doi:10.1111/jace.15766

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

Journal Article · 14 May 2018 · Journal of the American Ceramic Society

DOI: https://doi.org/10.1111/jace.15766 · OSTI ID:1456813

^[1]; Kiggans, Jr., Jim O. ^[1];

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Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

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.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1456813

Journal Information:: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 10 Vol. 101; ISSN 0002-7820

Publisher:: American Ceramic SocietyCopyright Statement

Country of Publication:: United States

Language:: English

References (9)

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38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
densification
hot isostatic pressing
oxidation
uranium/uranium compounds

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

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