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 - http://www.scopus.com/inward/record.url?scp=3343023689&partnerID=8YFLogxK
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 -