☆ 4.7 Article

High temperature thermal physical performance of BeO/UO2 composites prepared by spark plasma sintering (SPS)

SCRIPTA MATERIALIA (2018)

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Journal

SCRIPTA MATERIALIA
Volume 142, Issue -, Pages 70-73

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2017.08.031

Keywords

Spark plasma sintering; Ceramic matrix composites; Thermal conductivity; Thermal expansion

Categories

Nanoscience & Nanotechnology Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering

Funding

  1. National Natural Science Foundation of China [21501156, 51604250]
  2. China Academy of Engineering Physics [TP02201502]
  3. National Key Research and Development Plan [2017YEB0702400]

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In this paper, 10 vol% BeO/UO2 composites were fabricated by SPS technique. The thermal physical performance above the sintering temperature was reported for the first time. The thermal conductivity of BeO/UO2 was significantly enhanced compared to pure UO2, especially in the high temperature range close to an accident condition. The coefficient of thermal expansion (CTE) presented rapid falling trend above the sintering temperature, owing to the stress release and further sintering. Such results were of considerable importance for the design of nuclear fuel system. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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