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Title: Bulk moduli and high pressure crystal structure of U3Si2

Journal Article · · Journal of Nuclear Materials
 [1];  [2];  [3];  [4];  [5];  [3];  [3]
  1. Washington State Univ., Pullman, WA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Center for High Pressure Science & Technology Advanced Research, Shanghai (China)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Argonne National Lab. (ANL), Lemont, IL (United States)
  5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Bulk moduli are vital parameters to assess the mechanical performance of materials including nuclear fuels. Yet, little experimental data exist for U3Si2, a potential accident-tolerant nuclear fuel, whose bulk modulus has only been measured by resonant ultrasonic spectroscopy (RUS). In addition, the knowledge for high-pressure structural behavior and phase equilibrium of U3Si2 is largely lacking. Here we reviewed pressure dependence of the crystal structure of U3Si2 using high-energy synchrotron X-ray diffraction coupled with Rietveld analysis. The pressurization was achieved using a diamond anvil cell (DAC) which provides quasi-hydrostatic pressures up to 37.6 GPa. Crystal structural variation and equations of state of U3Si2 were obtained, and its bulk modulus, a- and c-axial moduli were derived to be 107.11 +/- 5.65 GPa, 82.87 +/- 4.78 GPa and 194.52 +/- 12.03 GPa, respectively. The determined elastic parameters are compared with those obtained by RUS and nanoindentation. (C) 2019 Elsevier B.V. All rights reserved.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
Grant/Contract Number:
AC02-06CH11357; 89233218CNA000001
OSTI ID:
1558228
Alternate ID(s):
OSTI ID: 1571618; OSTI ID: 1702424
Report Number(s):
LA-UR-19-22091; 154330
Journal Information:
Journal of Nuclear Materials, Vol. 523, Issue C; ISSN 0022-3115
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 20 works
Citation information provided by
Web of Science

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