Fabrication and thermal conductivity of CeO2–Ce3Si2 composite

Various compositions of CeO2–Ce3Si2 (0, 10, 30, 50, and 100 wt%Ce3Si2) composites were fabricated using conventional sintering and spark plasma sintering. Lower relative density, enhanced interdiffusion of oxygen and silicon, and silicide agglomerations from the congruent melting of Ce3Si2 at 1390 °...

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Bibliographic Details
Published in:Nuclear engineering and technology 2021-02, Vol.53 (2), p.583-591
Main Authors: Ahn, Jungsu, Kim, Gyeonghun, Jung, Yunsong, Ahn, Sangjoon
Format: Article
Language:English
Subjects:
Cerium oxide
Cerium silicide
Composite
Spark plasma sintering
Thermal conductivity
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Summary:Various compositions of CeO2–Ce3Si2 (0, 10, 30, 50, and 100 wt%Ce3Si2) composites were fabricated using conventional sintering and spark plasma sintering. Lower relative density, enhanced interdiffusion of oxygen and silicon, and silicide agglomerations from the congruent melting of Ce3Si2 at 1390 °C were only observed from conventionally-sintered pellets. Thermal conductivity of spark plasma sintered CeO2–Ce3Si2 composites was calculated from the measured thermal diffusivity, specific heat, and density, which exhibited dense (>90 %TD) and homogeneous microstructure. The composite with 50 wt%Ce3Si2 exhibited 55% higher thermal conductivity than CeO2 at 500 °C, and 81% higher at 1000 °C.
ISSN:1738-5733
DOI:10.1016/j.net.2020.07.016