Damage evaluation of W-coated SiC by thermal conductivity measurement

Y. Lee; S. J. Son; Y. Katoh; A. Kohyama

doi:10.1016/j.jnucmat.2004.04.115

Damage evaluation of W-coated SiC by thermal conductivity measurement

Y. Lee, S. J. Son, Y. Katoh, A. Kohyama

Materials Science and Technology Div

Research output: Contribution to journal › Conference article › peer-review

7 Scopus citations

Abstract

To evaluate the damage of W-coated SiC/SiC composites by thermal conductivity, evaluation of thermal conductivity measurement was performed for W-coated SiC, which was damaged by electron beam-induced thermal impact. After thermal impact of about 6 MW/m², melted phases around W/SiC interphase and reduction of thermal conductivity were observed. It was suggested that the temperature of the W/SiC interphase was raised to the melting point of a reaction phase, by the thermal impact of about 6 MW/m², and therefore a melted phase flowed out from the W/SiC interphase and cracks, reducing the thermal conductivity. Numerical calculations showed that the temperature of the W/SiC interphase could be controlled by the thickness of the W coating. The relation between melted phases and reduction of thermal conductivity will be investigated.

Original language	English
Pages (from-to)	549-553
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	329-333
Issue number	1-3 PART A
DOIs	https://doi.org/10.1016/j.jnucmat.2004.04.115
State	Published - Aug 1 2004
Event	Proceedings of the 11th Conference on Fusion Research - Kyoto, Japan Duration: Dec 7 2003 → Dec 12 2003

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title = "Damage evaluation of W-coated SiC by thermal conductivity measurement",

abstract = "To evaluate the damage of W-coated SiC/SiC composites by thermal conductivity, evaluation of thermal conductivity measurement was performed for W-coated SiC, which was damaged by electron beam-induced thermal impact. After thermal impact of about 6 MW/m2, melted phases around W/SiC interphase and reduction of thermal conductivity were observed. It was suggested that the temperature of the W/SiC interphase was raised to the melting point of a reaction phase, by the thermal impact of about 6 MW/m2, and therefore a melted phase flowed out from the W/SiC interphase and cracks, reducing the thermal conductivity. Numerical calculations showed that the temperature of the W/SiC interphase could be controlled by the thickness of the W coating. The relation between melted phases and reduction of thermal conductivity will be investigated.",

author = "Y. Lee and Son, {S. J.} and Y. Katoh and A. Kohyama",

year = "2004",

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doi = "10.1016/j.jnucmat.2004.04.115",

language = "English",

volume = "329-333",

pages = "549--553",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier",

number = "1-3 PART A",

note = "Proceedings of the 11th Conference on Fusion Research ; Conference date: 07-12-2003 Through 12-12-2003",

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TY - JOUR

T1 - Damage evaluation of W-coated SiC by thermal conductivity measurement

AU - Lee, Y.

AU - Son, S. J.

AU - Katoh, Y.

AU - Kohyama, A.

PY - 2004/8/1

Y1 - 2004/8/1

N2 - To evaluate the damage of W-coated SiC/SiC composites by thermal conductivity, evaluation of thermal conductivity measurement was performed for W-coated SiC, which was damaged by electron beam-induced thermal impact. After thermal impact of about 6 MW/m2, melted phases around W/SiC interphase and reduction of thermal conductivity were observed. It was suggested that the temperature of the W/SiC interphase was raised to the melting point of a reaction phase, by the thermal impact of about 6 MW/m2, and therefore a melted phase flowed out from the W/SiC interphase and cracks, reducing the thermal conductivity. Numerical calculations showed that the temperature of the W/SiC interphase could be controlled by the thickness of the W coating. The relation between melted phases and reduction of thermal conductivity will be investigated.

AB - To evaluate the damage of W-coated SiC/SiC composites by thermal conductivity, evaluation of thermal conductivity measurement was performed for W-coated SiC, which was damaged by electron beam-induced thermal impact. After thermal impact of about 6 MW/m2, melted phases around W/SiC interphase and reduction of thermal conductivity were observed. It was suggested that the temperature of the W/SiC interphase was raised to the melting point of a reaction phase, by the thermal impact of about 6 MW/m2, and therefore a melted phase flowed out from the W/SiC interphase and cracks, reducing the thermal conductivity. Numerical calculations showed that the temperature of the W/SiC interphase could be controlled by the thickness of the W coating. The relation between melted phases and reduction of thermal conductivity will be investigated.

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U2 - 10.1016/j.jnucmat.2004.04.115

DO - 10.1016/j.jnucmat.2004.04.115

M3 - Conference article

AN - SCOPUS:3342993599

SN - 0022-3115

VL - 329-333

SP - 549

EP - 553

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - 1-3 PART A

T2 - Proceedings of the 11th Conference on Fusion Research

Y2 - 7 December 2003 through 12 December 2003

ER -

Damage evaluation of W-coated SiC by thermal conductivity measurement

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