Thermal conductivity analysis of SiC ceramics and fully ceramic microencapsulated fuel composites

•Thermal conductivity of SiC ceramics and FCM pellets was measured and discussed.•Thermal conductivity of FCM pellets was analyzed by the Maxwell-Eucken equation.•Effective thermal conductivity of TRISO particles applied in this study was assumed. The thermal conductivity of SiC ceramics and FCM fue...

Full description

Saved in:
Bibliographic Details
Published in:Nuclear engineering and design 2017-01, Vol.311, p.9-15
Main Authors: Lee, Hyeon-Geun, Kim, Daejong, Lee, Seung Jae, Park, Ji Yeon, Kim, Weon-Ju
Format: Article
Language:English
Subjects:
Additives
Aluminum oxide
Analytical modeling
Ceramic coatings
Ceramic-matrix composites
Ceramics
Chemical compounds
Coated particles
Concentration (composition)
Heat conductivity
Heat transfer
Hot pressing
Microstructure
Particulate composites
Pellets
Silicon carbide
Sintering
Thermal conductivity
Yttrium oxide
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•Thermal conductivity of SiC ceramics and FCM pellets was measured and discussed.•Thermal conductivity of FCM pellets was analyzed by the Maxwell-Eucken equation.•Effective thermal conductivity of TRISO particles applied in this study was assumed. The thermal conductivity of SiC ceramics and FCM fuel composites, consisting of a SiC matrix and TRISO coated particles, was measured and analyzed. SiC ceramics and FCM pellets were fabricated by hot press sintering with Al2O3 and Y2O3 sintering additives. Several factors that influence thermal conductivity, specifically the content of sintering additives for SiC ceramics and the volume fraction of TRISO particles and the matrix thermal conductivity of FCM pellets, were investigated. The thermal conductivity values of samples were analyzed on the basis of their microstructure and the arrangement of TRISO particles. The thermal conductivity of the FCM pellets was compared to that predicted by the Maxwell-Eucken equation and the thermal conductivity of TRISO coated particles was calculated. The thermal conductivity of FCM pellets in various sintering conditions was in close agreement to that predicted by the Maxwell-Eucken equation with the fitted thermal conductivity value of TRISO particles.
ISSN:0029-5493
1872-759X
DOI:10.1016/j.nucengdes.2016.11.005