Surface engineering for ceramic and SiC/SiC joint improvement

Surface engineering for ceramic and SiC/SiC joint improvement

Surface engineering, based on the selective thermal removal (STR) from SiC/SiC composites, was used to increase the joined specific area and consequently the strength of SiC/SiC joints. The STR is aimed to obtain a brush-like surface on SiC/SiC by thermal treatment that leads to selective removal of SiC fibers.

SEM images of cross-sectioned SiC_f/SiC composites after STR (Selective Thermal Removal)

SEM-BS images of brazing alloy (AgCuTi) drop after wetting test over a STR SiC/SiC composite

surface, joining, CMC, SiC

valentina.casalegno@polito.it

Recent reference(s)

Valenza, Fabrizio; Casalegno, Valentina; Gambaro, Sofia; Muolo, Maria Luigia; Passerone, Alberto; Salvo, Milena; Ferraris, Monica “ Surface engineering of SiCf/SiC composites by selective thermal removal. - In: INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY. - ISSN 1546-542X. - 14:3(2017), pp. 287-294.

Funding

Project “ADMACOM - Advanced manufacturing routes for metal/composite components for aerospace” (Grant agreement No 609188)