Uranium migration in spark plasma sintered W/UO2 CERMETS

Dennis S. Tucker; Yaqiao Wu; Jatuporn Burns

doi:10.1016/j.jnucmat.2017.12.029

Uranium migration in spark plasma sintered W/UO₂ CERMETS

Dennis S. Tucker
, Yaqiao Wu
, Jatuporn Burns

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

W/UO₂ CERMET samples were sintered in a Spark Plasma Sintering (SPS) furnace at various temperature under vacuum and pressure. High Resolution Transmission Electron Microscopy (HRTEM) with Energy Dispersive Spectroscopy (EDS) was performed on the samples to determine interface structures and uranium diffusion from the UO₂ particles into the tungsten matrix. Local Electrode Atom Probe (LEAP) was also performed to determine stoichiometry of the UO₂ particles. It was seen that uranium diffused approximately 10–15 nm into the tungsten matrix. This is explained in terms of production of oxygen vacancies and Fick's law of diffusion.

Original language	English
Pages (from-to)	141-144
Number of pages	4
Journal	Journal of Nuclear Materials
Volume	500
DOIs	https://doi.org/10.1016/j.jnucmat.2017.12.029
State	Published - Mar 2018

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title = "Uranium migration in spark plasma sintered W/UO2 CERMETS",

abstract = "W/UO2 CERMET samples were sintered in a Spark Plasma Sintering (SPS) furnace at various temperature under vacuum and pressure. High Resolution Transmission Electron Microscopy (HRTEM) with Energy Dispersive Spectroscopy (EDS) was performed on the samples to determine interface structures and uranium diffusion from the UO2 particles into the tungsten matrix. Local Electrode Atom Probe (LEAP) was also performed to determine stoichiometry of the UO2 particles. It was seen that uranium diffused approximately 10–15 nm into the tungsten matrix. This is explained in terms of production of oxygen vacancies and Fick's law of diffusion.",

author = "Tucker, \{Dennis S.\} and Yaqiao Wu and Jatuporn Burns",

note = "Publisher Copyright: {\textcopyright} 2017",

year = "2018",

month = mar,

doi = "10.1016/j.jnucmat.2017.12.029",

language = "English",

volume = "500",

pages = "141--144",

journal = "Journal of Nuclear Materials",

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AU - Tucker, Dennis S.

AU - Wu, Yaqiao

AU - Burns, Jatuporn

PY - 2018/3

Y1 - 2018/3

N2 - W/UO2 CERMET samples were sintered in a Spark Plasma Sintering (SPS) furnace at various temperature under vacuum and pressure. High Resolution Transmission Electron Microscopy (HRTEM) with Energy Dispersive Spectroscopy (EDS) was performed on the samples to determine interface structures and uranium diffusion from the UO2 particles into the tungsten matrix. Local Electrode Atom Probe (LEAP) was also performed to determine stoichiometry of the UO2 particles. It was seen that uranium diffused approximately 10–15 nm into the tungsten matrix. This is explained in terms of production of oxygen vacancies and Fick's law of diffusion.

AB - W/UO2 CERMET samples were sintered in a Spark Plasma Sintering (SPS) furnace at various temperature under vacuum and pressure. High Resolution Transmission Electron Microscopy (HRTEM) with Energy Dispersive Spectroscopy (EDS) was performed on the samples to determine interface structures and uranium diffusion from the UO2 particles into the tungsten matrix. Local Electrode Atom Probe (LEAP) was also performed to determine stoichiometry of the UO2 particles. It was seen that uranium diffused approximately 10–15 nm into the tungsten matrix. This is explained in terms of production of oxygen vacancies and Fick's law of diffusion.

UR - https://www.scopus.com/pages/publications/85039716500

U2 - 10.1016/j.jnucmat.2017.12.029

DO - 10.1016/j.jnucmat.2017.12.029

M3 - Article

AN - SCOPUS:85039716500

SN - 0022-3115

VL - 500

SP - 141

EP - 144

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

ER -

Uranium migration in spark plasma sintered W/UO₂ CERMETS

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