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Title: Optimizing the transverse thermal conductivity of 2D-SiCf/SiC composites, I. Modeling

Abstract

For potential fusion applications, considerable fabrication efforts have been directed to obtaining transverse thermal conductivity (Keff) values in excess of 30 W/mK (unirradiated) in the 800-1000°C temperature range for 2D-SiCf/SiC composites. To gain insight into the factors affecting Keff, at PNNL we have tested three different analytic models for predicting Keff in terms of constituent (fiber, matrix and interphase) properties. The tested models were: the Hasselman-Johnson (H-J) “2-Cylinder” model, which examines the effects of fiber-matrix (f/m) thermal barriers; the Markworth “3-Cylinder” model, which specifically examines the effects of interphase thickness and thermal conductivity; and a newly-developed Anisotropic “3-Square” model, which examines the potential effect of introducing a fiber coating with anisotropic properties to enhance (or diminish) f/m thermal coupling. The first two models are effective medium models, while the third model is a simple combination of parallel and series conductances. Model predictions suggest specific designs and/or development efforts directed to optimize the overall thermal transport performance of 2D-SiCf/SiC.

Authors:
; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
901777
Report Number(s):
PNNL-SA-47884
Journal ID: ISSN 0022-3115; JNUMAM; AT6020100; TRN: US0702646
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Journal of Nuclear Materials, 307-311:1112-1119
Additional Journal Information:
Journal Volume: 307-311; Journal ID: ISSN 0022-3115
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 36 MATERIALS SCIENCE; SILICON CARBIDES; SILICON COMPOUNDS; CALIFORNIUM COMPOUNDS; COMPOSITE MATERIALS; THERMONUCLEAR REACTOR MATERIALS; MATHEMATICAL MODELS; THERMAL CONDUCTIVITY; COMPARATIVE EVALUATIONS

Citation Formats

Youngblood, Gerald E, Senor, David J, and Jones, Russell H. Optimizing the transverse thermal conductivity of 2D-SiCf/SiC composites, I. Modeling. United States: N. p., 2002. Web. doi:10.1016/S0022-3115(02)00952-2.
Youngblood, Gerald E, Senor, David J, & Jones, Russell H. Optimizing the transverse thermal conductivity of 2D-SiCf/SiC composites, I. Modeling. United States. https://doi.org/10.1016/S0022-3115(02)00952-2
Youngblood, Gerald E, Senor, David J, and Jones, Russell H. 2002. "Optimizing the transverse thermal conductivity of 2D-SiCf/SiC composites, I. Modeling". United States. https://doi.org/10.1016/S0022-3115(02)00952-2.
@article{osti_901777,
title = {Optimizing the transverse thermal conductivity of 2D-SiCf/SiC composites, I. Modeling},
author = {Youngblood, Gerald E and Senor, David J and Jones, Russell H},
abstractNote = {For potential fusion applications, considerable fabrication efforts have been directed to obtaining transverse thermal conductivity (Keff) values in excess of 30 W/mK (unirradiated) in the 800-1000°C temperature range for 2D-SiCf/SiC composites. To gain insight into the factors affecting Keff, at PNNL we have tested three different analytic models for predicting Keff in terms of constituent (fiber, matrix and interphase) properties. The tested models were: the Hasselman-Johnson (H-J) “2-Cylinder” model, which examines the effects of fiber-matrix (f/m) thermal barriers; the Markworth “3-Cylinder” model, which specifically examines the effects of interphase thickness and thermal conductivity; and a newly-developed Anisotropic “3-Square” model, which examines the potential effect of introducing a fiber coating with anisotropic properties to enhance (or diminish) f/m thermal coupling. The first two models are effective medium models, while the third model is a simple combination of parallel and series conductances. Model predictions suggest specific designs and/or development efforts directed to optimize the overall thermal transport performance of 2D-SiCf/SiC.},
doi = {10.1016/S0022-3115(02)00952-2},
url = {https://www.osti.gov/biblio/901777}, journal = {Journal of Nuclear Materials, 307-311:1112-1119},
issn = {0022-3115},
number = ,
volume = 307-311,
place = {United States},
year = {Tue Dec 31 00:00:00 EST 2002},
month = {Tue Dec 31 00:00:00 EST 2002}
}