Low activation brazing materials and techniques for SiCf/SiC composites

A low activation brazing technique for silicon carbide fiber reinforced silicon carbide matrix composites (SiCf/SiC) is presented; this technique is based on the use of the 78Si--22Ti (wt%) eutectic alloy. The joints obtained take advantage of a melting point able to avoid composite fibre-interface...

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Bibliographic Details
Published inJournal of nuclear materials Vol. 307-311; pp. 1237 - 1241
Main Authors Riccardi, B., Nannetti, C.A., Petrisor, T., Sacchetti, M.
Format Journal Article
LanguageEnglish
Published 01.12.2002
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Summary:A low activation brazing technique for silicon carbide fiber reinforced silicon carbide matrix composites (SiCf/SiC) is presented; this technique is based on the use of the 78Si--22Ti (wt%) eutectic alloy. The joints obtained take advantage of a melting point able to avoid composite fibre-interface degradation. All the joints showed absence of discontinuities and defects at the interface and a fine eutectic structure. Moreover, the joint layer appeared well adherent both to the matrix and the fibre interphase and the brazing alloy infiltration looked sufficiently controlled. The joints of SiCf/SiC composites showed 71plus /minus10 MPa almost pure shear strength at RT and up to 70 MPa at 600 deg C.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0022-3115
DOI:10.1016/S0022-3115(02)00959-5