TY - JOUR
T1 - Effects of fibers and fabrication processes on mechanical properties of neutron irradiated SiC/SiC composites
AU - Nozawa, T.
AU - Hinoki, T.
AU - Katoh, Y.
AU - Kohyama, A.
PY - 2002/12
Y1 - 2002/12
N2 - Radiation effects on flexural properties of SiC/SiC composites fabricated by forced thermal gradient chemical vapor infiltration (F-CVI) process, reaction sintered (RS) process and polymer impregnation and pyrolysis (PIP) process were investigated. In this study, neutron irradiation at 1073 K up to 0.4 × 1025 n/m2 (E > 0.1 MeV) was performed. For F-CVI and RS SiC/SiC, due to the irradiation damage of interphase like pyrolytic carbon and boron nitride, which were sensitive to neutron irradiation, composite stiffness was slightly decreased. On the contrary, for PIP SiC/SiC, there was no significant change in stiffness before and after irradiation. Composite strength, however, was nearly stable against high-temperature irradiation with such a low fluence, except for RS SiC/SiC, since mechanical characteristics of fiber and matrix themselves were still stable to neutron irradiation. However RS SiC/SiC had a slight reduction of flexural strength due to the severe degradation of the interface by neutron irradiation.
AB - Radiation effects on flexural properties of SiC/SiC composites fabricated by forced thermal gradient chemical vapor infiltration (F-CVI) process, reaction sintered (RS) process and polymer impregnation and pyrolysis (PIP) process were investigated. In this study, neutron irradiation at 1073 K up to 0.4 × 1025 n/m2 (E > 0.1 MeV) was performed. For F-CVI and RS SiC/SiC, due to the irradiation damage of interphase like pyrolytic carbon and boron nitride, which were sensitive to neutron irradiation, composite stiffness was slightly decreased. On the contrary, for PIP SiC/SiC, there was no significant change in stiffness before and after irradiation. Composite strength, however, was nearly stable against high-temperature irradiation with such a low fluence, except for RS SiC/SiC, since mechanical characteristics of fiber and matrix themselves were still stable to neutron irradiation. However RS SiC/SiC had a slight reduction of flexural strength due to the severe degradation of the interface by neutron irradiation.
UR - http://www.scopus.com/inward/record.url?scp=0036953184&partnerID=8YFLogxK
U2 - 10.1016/S0022-3115(02)01057-7
DO - 10.1016/S0022-3115(02)01057-7
M3 - Article
AN - SCOPUS:0036953184
SN - 0022-3115
VL - 307-311
SP - 1173
EP - 1177
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 2 SUPPL.
ER -