Interfacial reactions and mechanical properties of W-SiC in-situ joints for plasma facing components

S. J. Son; K. H. Park; Y. Katoh; A. Kohyama

doi:10.1016/j.jnucmat.2004.04.285

Interfacial reactions and mechanical properties of W-SiC in-situ joints for plasma facing components

S. J. Son
, K. H. Park
, Y. Katoh
, A. Kohyama

Materials Science and Technology Div

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

47 Scopus citations

Abstract

Joints of tungsten and SiC were produced by a hot-pressing method and characterized on interfacial reaction and ambient temperature mechanical properties. Reaction phases were identified and the diffusion path was demonstrated by means of quantitative analysis. Four distinctive reaction phases, namely tungsten silicides (WSi₂, W₅Si₃) and tungsten carbides (WC, W₂C), were formed in various processing conditions. Complex reactions were confirmed in tungsten-SiC diffusion pair, and the diffusion path was experimentally verified as SiC/WSi₂/WC/W ₅Si₃/W₂C/W. Mechanical properties of the joints were evaluated by flexural and shear tests. Joint shear strength as high as ∼90 MPa was obtained even when substantial interfacial reaction occurred, however, excessive growth of the reaction layer caused a severe degradation in strength.

Original language	English
Pages (from-to)	1549-1552
Number of pages	4
Journal	Journal of Nuclear Materials
Volume	329-333
Issue number	1-3 PART B
DOIs	https://doi.org/10.1016/j.jnucmat.2004.04.285
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 = "Interfacial reactions and mechanical properties of W-SiC in-situ joints for plasma facing components",

abstract = "Joints of tungsten and SiC were produced by a hot-pressing method and characterized on interfacial reaction and ambient temperature mechanical properties. Reaction phases were identified and the diffusion path was demonstrated by means of quantitative analysis. Four distinctive reaction phases, namely tungsten silicides (WSi2, W5Si3) and tungsten carbides (WC, W2C), were formed in various processing conditions. Complex reactions were confirmed in tungsten-SiC diffusion pair, and the diffusion path was experimentally verified as SiC/WSi2/WC/W 5Si3/W2C/W. Mechanical properties of the joints were evaluated by flexural and shear tests. Joint shear strength as high as ∼90 MPa was obtained even when substantial interfacial reaction occurred, however, excessive growth of the reaction layer caused a severe degradation in strength.",

author = "Son, \{S. J.\} and Park, \{K. H.\} and Y. Katoh and A. Kohyama",

year = "2004",

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doi = "10.1016/j.jnucmat.2004.04.285",

language = "English",

volume = "329-333",

pages = "1549--1552",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

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number = "1-3 PART B",

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 - Interfacial reactions and mechanical properties of W-SiC in-situ joints for plasma facing components

AU - Son, S. J.

AU - Park, K. H.

AU - Katoh, Y.

AU - Kohyama, A.

PY - 2004/8/1

Y1 - 2004/8/1

N2 - Joints of tungsten and SiC were produced by a hot-pressing method and characterized on interfacial reaction and ambient temperature mechanical properties. Reaction phases were identified and the diffusion path was demonstrated by means of quantitative analysis. Four distinctive reaction phases, namely tungsten silicides (WSi2, W5Si3) and tungsten carbides (WC, W2C), were formed in various processing conditions. Complex reactions were confirmed in tungsten-SiC diffusion pair, and the diffusion path was experimentally verified as SiC/WSi2/WC/W 5Si3/W2C/W. Mechanical properties of the joints were evaluated by flexural and shear tests. Joint shear strength as high as ∼90 MPa was obtained even when substantial interfacial reaction occurred, however, excessive growth of the reaction layer caused a severe degradation in strength.

AB - Joints of tungsten and SiC were produced by a hot-pressing method and characterized on interfacial reaction and ambient temperature mechanical properties. Reaction phases were identified and the diffusion path was demonstrated by means of quantitative analysis. Four distinctive reaction phases, namely tungsten silicides (WSi2, W5Si3) and tungsten carbides (WC, W2C), were formed in various processing conditions. Complex reactions were confirmed in tungsten-SiC diffusion pair, and the diffusion path was experimentally verified as SiC/WSi2/WC/W 5Si3/W2C/W. Mechanical properties of the joints were evaluated by flexural and shear tests. Joint shear strength as high as ∼90 MPa was obtained even when substantial interfacial reaction occurred, however, excessive growth of the reaction layer caused a severe degradation in strength.

UR - https://www.scopus.com/pages/publications/3343023689

U2 - 10.1016/j.jnucmat.2004.04.285

DO - 10.1016/j.jnucmat.2004.04.285

M3 - Conference article

AN - SCOPUS:3343023689

SN - 0022-3115

VL - 329-333

SP - 1549

EP - 1552

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - 1-3 PART B

T2 - Proceedings of the 11th Conference on Fusion Research

Y2 - 7 December 2003 through 12 December 2003

ER -

Interfacial reactions and mechanical properties of W-SiC in-situ joints for plasma facing components

Abstract

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