SiC-IrSi₃ for High Oxidation Resistance

• Main Authors: Antonio Camarano, Donatella Giuranno, Javier Narciso
• Format: Article
• Language: English
• Published: MDPI AG 2019-12-01
• Series: Materials
• Subjects: sic composites; reactive infiltration; silicides
• Online Access: https://www.mdpi.com/1996-1944/13/1/98

SiC is a material with excellent mechanical and thermal properties but with a high production cost. Obtaining SiC by reactive infiltration is an attractive method with a much lower cost than the traditional sintering process. However, the reactive infiltration process presents a serious problem, which is the high residual silicon content, which decreases its applicability. The replacement of silicon with silicides is a widely used alternative. The present investigation shows the good mechanical properties of the SiC-IrSi₃ composite material obtained by reactive infiltration of SiC-C preforms with Ir−Si alloys. The thermomechanical analysis shows a high compatibility of silicide with SiC. The presence of the silicide shows a substantial improvement against the oxidation of the SiC-Si composites.