Abstract
Unidirectional SiC/SiC composites fabricated with highly-crystalline and stoichiometric fibers and matrix, but with three different interfacial types (single-layer pyrolytic carbon (PyC), multi-layered SiC/PyC, and pseudo porous SiC interfaces) were irradiated up to 1.0 × 1025 n/m 2 (E > 0.1 MeV) at 1073 and 1273 K. Tensile, inter-laminar shear, and flexural properties were evaluated to compare the role of different interfaces on neutron irradiation behavior. There was nearly no significant degradation in tensile and flexural strength after high-temperature neutron irradiation, except for porous SiC interphase composite. Moreover, no meaningful reduction of tensile modulus was identified regardless of interphase types, although 20-40 % degradation in flexural moduli occurred due to a reduction in inter-laminar shear modulus. In contrast, matrix cracking stress was significantly dependent on interfacial properties. Multilayer interphase composites exhibited the best irradiation stability. Irradiation instability of thick PyC and porous SiC interphase resulted in 20 % and 40 % degradations of matrix cracking stress, respectively. Copyright O 2005 by ASTM International.
Original language | English |
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Title of host publication | Effects of Radiation on Materials |
Subtitle of host publication | 22nd Symposium |
Publisher | American Society for Testing and Materials |
Pages | 392-404 |
Number of pages | 13 |
Volume | 1475 STP |
ISBN (Print) | 0803134010, 9780803134010 |
Publication status | Published - 2006 Jan 1 |
Externally published | Yes |
Event | 22nd Symposium on Effects of Radiation on Materials - Boston, MA, United States Duration: 2004 Jun 8 → 2004 Jun 10 |
Other
Other | 22nd Symposium on Effects of Radiation on Materials |
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Country/Territory | United States |
City | Boston, MA |
Period | 04/6/8 → 04/6/10 |
Keywords
- Flexure
- Inter-laminar shear
- Neutron irradiation effect
- SiC/SiC composites
- Small specimen test technique
- Tensile
ASJC Scopus subject areas
- Materials Science(all)