TY - GEN
T1 - Tensile, flexural, and shear properties of neutron irradiated SiC/SiC composites with different fiber-matrix interfaces
AU - Nozawa, Takashi
AU - Ozawa, Kazumi
AU - Kondo, Sosuke
AU - Hinoki, Talsuya
AU - Katoh, Yutai
AU - Snead, Lance L.
AU - Kohyama, Akira
PY - 2006
Y1 - 2006
N2 - 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.
AB - 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.
KW - Flexure
KW - Inter-laminar shear
KW - Neutron irradiation effect
KW - SiC/SiC composites
KW - Small specimen test technique
KW - Tensile
UR - http://www.scopus.com/inward/record.url?scp=59149105413&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:59149105413
SN - 0803134010
SN - 9780803134010
T3 - ASTM Special Technical Publication
SP - 392
EP - 404
BT - Effects of Radiation on Materials
PB - American Society for Testing and Materials
T2 - 22nd Symposium on Effects of Radiation on Materials
Y2 - 8 June 2004 through 10 June 2004
ER -