Structure and flexural properties of 3D needled carbon fiber reinforced carbon and silicon carbide (C/C-SiC) composites fabricated by gaseous and liquid silicon infiltration

Journal article

3D needled carbon fiber reinforced composites (C/C-SiC) were fabricated by gaseous silicon infiltration (GSI) for different reaction times, followed by further densification with liquid silicon infiltration (LSI). The density, flexural modulus and flexural strength increased as a spatially connected SiC structure developed, but the flexural strength could be degraded by a long total reaction time. The composites all exhibited quasi-brittle fracture with fiber bundle pull-out and interfacial debonding. Fracture could propagate within the needle bundles that were perpendicular to the tensile stress.

Authors: Wan, F; Pizada, T; Liu, R; Wang, Y; Qi, G

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Elsevier
• Journal: Ceramics International
• Volume: 45
• Issue: 14
• Pages: 17978-17986
• Publication date: 2019-06-05
• Acceptance date: 2019-06-03
• DOI: 10.1016/j.ceramint.2019.06.016
• EISSN: 1873-3956
• ISSN: 0272-8842
• Language: English
• Keywords: gaseous silicon infiltration; C/C-SiC; mercury intrusion porosimetry; FFR; flexural properties; densification; x-ray computed tomography; liquid silicon infiltration