Matrix-dependent interfacial shear strength and fracture mechanisms in Si3N4 fiber-reinforced composites. (IMAGE)

Tsinghua University Press

Matrix-dependent interfacial shear strength and fracture mechanisms in Si3N4 fiber-reinforced composites.

Caption

Schematic illustration of the correlation between matrix composition, interfacial shear strength, and the resulting fracture modes in Si3N4 fiber-reinforced composites. Left: The Si3N4f/SiO2 composite exhibits low interfacial shear strength,, allowing for effective interfacial debonding and extensive long single-fiber pull-out. Middle: The Si3N4f/BN composite demonstrates moderate interfacial bonding, primarily characterized by fiber bundle pull-out. Right: The Si3N4f/SiO2-BN composite possesses an excessively high interfacial shear strength,. This over-strong bonding tightly locks the fibers, completely suppressing fiber pull-out and leading to catastrophic brittle fracture.

Credit

Journal of Advanced Ceramics, Tsinghua University Press

Usage Restrictions

News organizations may use or redistribute this image, with proper attribution, as part of news coverage of this paper only.

License

Original content

Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.