TY - JOUR
T1 - Evaluation of damage tolerance of advanced SiC/SiC composites after neutron irradiation
AU - Ozawa, Kazumi
AU - Katoh, Yutai
AU - Nozawa, Takashi
AU - Hinoki, Tatsuya
AU - Snead, Lance L.
PY - 2011
Y1 - 2011
N2 - Silicon carbide composites (SiC/SiC) are attractive candidate materials for structural and functional components in fusion energy systems. The effect of neutron irradiation on damage tolerance of the nuclear grade SiC/SiC composites (plain woven Hi-Nicalon Type-S reinforced CVI matrix composites multilayer interphase and unidirectional Tyranno-SA3 reinforced NITE matrix with carbon mono-layer interphase) was evaluated by means of miniaturized single-edged notched beam test. No significant changes in crack extension behavior and in the load-loadpoint displacement characteristics such as the peak load and hysteresis loop width were observed after irradiation to 5.9 × 10 25 n/m2 (E > 0.1 MeV) at 800°C and to 5.8 × 1025 n/m2 at 1300°C. By applying a global energy balance analysis based on non-linear fracture mechanics, the energy release rate for these composite materials was found to be unchanged by irradiation with a value of 3±2 kJ/m2. This has led to the conclusion that, for these fairly aggressive irradiation conditions, the effect of neutron irradiation on the fracture resistance of these composites appears insignificant.
AB - Silicon carbide composites (SiC/SiC) are attractive candidate materials for structural and functional components in fusion energy systems. The effect of neutron irradiation on damage tolerance of the nuclear grade SiC/SiC composites (plain woven Hi-Nicalon Type-S reinforced CVI matrix composites multilayer interphase and unidirectional Tyranno-SA3 reinforced NITE matrix with carbon mono-layer interphase) was evaluated by means of miniaturized single-edged notched beam test. No significant changes in crack extension behavior and in the load-loadpoint displacement characteristics such as the peak load and hysteresis loop width were observed after irradiation to 5.9 × 10 25 n/m2 (E > 0.1 MeV) at 800°C and to 5.8 × 1025 n/m2 at 1300°C. By applying a global energy balance analysis based on non-linear fracture mechanics, the energy release rate for these composite materials was found to be unchanged by irradiation with a value of 3±2 kJ/m2. This has led to the conclusion that, for these fairly aggressive irradiation conditions, the effect of neutron irradiation on the fracture resistance of these composites appears insignificant.
UR - http://www.scopus.com/inward/record.url?scp=84898958154&partnerID=8YFLogxK
U2 - 10.1088/1757-899X/18/16/162005
DO - 10.1088/1757-899X/18/16/162005
M3 - Conference article
AN - SCOPUS:84898958154
SN - 1757-8981
VL - 18
JO - IOP Conference Series: Materials Science and Engineering
JF - IOP Conference Series: Materials Science and Engineering
IS - SYMPOSIUM 10
M1 - 162005
T2 - 3rd International Congress on Ceramics, ICC 2011
Y2 - 14 November 2010 through 18 November 2010
ER -