Uranium Migration in Spark Plasma Sintered W/UO2 CERMETS

Dennis S. Tucker, Yaqiao Wu, Jatuporn Burns

Research output: Contribution to journalArticlepeer-review

Abstract

W/UO 2 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 UO 2 particles into the tungsten matrix. Local Electrode Atom Probe (LEAP) was also performed to determine stoichiometry of the UO 2 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 languageAmerican English
JournalMaterials Science and Engineering Faculty Publications and Presentations
StatePublished - 1 Mar 2018

EGS Disciplines

  • Materials Science and Engineering

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