skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: The effect of aluminum additions on the oxidation resistance of U3Si2

Journal Article · · Journal of Nuclear Materials

The effect of aluminum additions to U3Si2 is investigated in this paper as a means to improve the oxidation resistance of this nuclear fuel form. Four U-Si-Al compositions have been synthesized and characterized using scanning electron microscopy, energy dispersive spectroscopy, and x-ray diffraction. The onsets of breakaway oxidation are identified in air thermal ramp tests using thermogravimetric analysis. The final oxidation products following 1000° C air exposure are identified using x-ray diffraction and compared to those of UO2 and U metal oxidized in the same manner. Finally, thermogravimetric data acquired in this study indicates that increasing amounts of Al in U3Si2 further delays the onset of breakaway oxidation, providing enhanced oxidation resistance in air. Al2O3 formation on U3Al2Si3 is observed following a heat treatment performed at 500° C in air, demonstrating the potential of Al additions to improve the oxidation resistance of U3Si2.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE), Fuel Cycle Technologies (NE-5); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Nuclear Energy (NE)
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1412882
Alternate ID(s):
OSTI ID: 1396905
Report Number(s):
LA-UR-17-30757; TRN: US1800390
Journal Information:
Journal of Nuclear Materials, Vol. 489; ISSN 0022-3115
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 36 works
Citation information provided by
Web of Science

References (16)

Thermophysical properties of U3Si to 1150K journal September 2014
Thermophysical properties of U 3 Si 2 to 1773 K journal September 2015
Thermophysical properties of USi to 1673 K journal April 2016
Thermophysical properties of U3Si5 to 1773 K journal January 2015
Oxidation behavior of U-Si compounds in air from 25 to 1000 C journal February 2017
U-Si and U-Si-Ai Dispersion Fuel Alloy Development for Research and Test Reactors journal September 1983
Low enrichment dispersion fuels for research and test reactors journal May 1984
Phase equilibria in the UU3Si2-UAl2 system journal May 1991
Phase formation and growth at interface between U3Si and aluminium journal October 1991
Simulation of in-reactor swelling in U-3.5 wt % Si-1.5 wt % Al by ion bombardment journal March 1976
Uranium Intermetallic Fuels (U–Al, U–Si, U–Mo) book January 2012
Crystal structure stability and fission gas swelling in intermetallic uranium compounds journal October 1986
Magnetic structures of U3M2M3′, M=Al, Ga; M′=Si, Ge: a neutron powder diffraction study journal January 1999
Crystal Structure and Magnetism of Novel Compounds U3(M′, M″5), M′ = Al,Ga, M″ = Si,Ge journal August 1994
Crystal chemical studies of the 5 f -series of elements. VIII. Crystal structure studies of uranium silicides and of CeSi 2 , NpSi 2 , and PuSi 2 journal April 1949
Structure de U 4 O 9 journal August 1961

Cited By (1)

A first-principles study on the influences of metal species Al, Zr, Mo and Tc on the mechanical properties of U 3 Si 2 journal January 2020

Similar Records

U3Si2 and UO2 composites densified by spark plasma sintering for accident-tolerant fuels
Journal Article · Thu Apr 09 00:00:00 EDT 2020 · Journal of Nuclear Materials · OSTI ID:1412882

Oxidation behavior of U-Si compounds in air from 25 to 1000 C
Journal Article · Sun Dec 18 00:00:00 EST 2016 · Journal of Nuclear Materials · OSTI ID:1412882

The synthesis and air oxidation behavior of U-Si-Al and U-Si-B compositions
Conference · Fri Jul 01 00:00:00 EDT 2016 · OSTI ID:1412882