Fabrication and thermal conductivity of CeO 2 -Ce 3 Si 2 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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Published in:Nuclear engineering and technology 2021, Vol.53 (2), p.583-591
Main Authors: Ahn, Jungsu, Kim, Gyeonghun, Jung, Yunsong, Ahn, Sangjoon
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creator Ahn, Jungsu
Kim, Gyeonghun
Jung, Yunsong
Ahn, Sangjoon
description 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 ℃ 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 ℃, and 81% higher at 1000 ℃.
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title Fabrication and thermal conductivity of CeO 2 -Ce 3 Si 2 composite
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