SYMPOSIA PAPER Published: 01 January 2001
STP10572S

Microstructural Stability of SiC/SiC Composites under Dual-Beam Ion Irradiation

Source

Microstructural evolution of silicon carbide fiber-reinforced silicon carbide matrix composites (SiC/SiC composites) during dual-beam ion irradiation was studied. The composites had been fabricated by means of chemical vapor infiltration (CVI) and polymer impregnation and pyrolysis (PIP) methods using advanced fibers, i.e., Hi-NicalonTM Type-S and TyrannoTM-SA, as well as conventional fibers. Dual-beam ion irradiation was performed to 10 dpa at 873K and 60appmHe/dpa. Composites with advanced low-oxygen near-stoichiometric SiC fiber with high crystallinity and beta-SiC matrix exhibited superior irradiation resistance, in contrast to that amorphous Si-C-O based fibers and conventional polymer-derived matrix exhibited microstructural instability in association with irradiation-induced crystallization. Pyrolytic carbon deposited as the fiber-matrix (F-M) interphase exhibited irradiation-induced amorphization and the helium co-implantation enhanced it. Post-irradiation heat treatment caused significant microstructural changes across the F-M interphases at temperatures as low as the composites are supposed to retain their mechanical strength.

Author Information

Katoh, Y
Institute of Advanced Energy, Kyoto University, Kyoto, Japan Japan Science and Technology Corporation, Kawaguchi, Japan
Kishimoto, H
Institute of Advanced Energy, Kyoto University, Kyoto, Japan
Ando, M
Japan Atomic Energy Research Institute, Naka-gun, Japan
Kohyama, A
Institute of Advanced Energy, Kyoto University, Kyoto, Japan Japan Science and Technology Corporation, Kawaguchi, Japan
Shibayama, T
Hokkaido University, Sapporo, Japan
Takahashi, H
Hokkaido University, Sapporo, Japan
Price: $25.00
Contact Sales
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Developed by Committee: E10
Pages: 786–798
DOI: 10.1520/STP10572S
ISBN-EB: 978-0-8031-5454-4
ISBN-13: 978-0-8031-2878-1