TY - JOUR
T1 - Helium release and microstructure of neutron-irradiated SiC ceramics
AU - Sasaki, K.
AU - Yano, T.
AU - Maruyama, T.
AU - Iseki, T.
N1 - Funding Information:
The present research was partly supported by a Grant-in-Aid for Scientific and Fusion Research from the Ministry of the Education, Science and Culture, Japan. The authors would like to thank the staff of the Oarai Branch, Institute for Materials Research, Tohoku University for technical assistance.
PY - 1991
Y1 - 1991
N2 - α-SiC ceramics containing 10B were neutron-irradiated in the JMTR to a fluence of 6.0 × 1024 n/m2 (E > 1 MeV) at 650° C. Helium release from SiC ceramics and powders was measured up to 2000° C. Microstructural observation by TEM was also carried out on SiC specimens annealed at temperatures in the range 1200-2000 °C. The helium release rate of the powder specimen started to increase at about 800°C and two peaks were observed at 1100 and 1260°C. By contrast, the sintered specimen showed a low gas release rate up to 1800°C and exhibited a rapid increase above this temperature. The helium release mechanism from the sintered specimen was discussed in terms of the mobility of helium atoms and vacancies, and bubbles at grain boundaries.
AB - α-SiC ceramics containing 10B were neutron-irradiated in the JMTR to a fluence of 6.0 × 1024 n/m2 (E > 1 MeV) at 650° C. Helium release from SiC ceramics and powders was measured up to 2000° C. Microstructural observation by TEM was also carried out on SiC specimens annealed at temperatures in the range 1200-2000 °C. The helium release rate of the powder specimen started to increase at about 800°C and two peaks were observed at 1100 and 1260°C. By contrast, the sintered specimen showed a low gas release rate up to 1800°C and exhibited a rapid increase above this temperature. The helium release mechanism from the sintered specimen was discussed in terms of the mobility of helium atoms and vacancies, and bubbles at grain boundaries.
UR - https://www.scopus.com/pages/publications/0000707268
UR - https://www.scopus.com/pages/publications/0000707268#tab=citedBy
U2 - 10.1016/0022-3115(91)90111-J
DO - 10.1016/0022-3115(91)90111-J
M3 - Article
AN - SCOPUS:0000707268
SN - 0022-3115
VL - 179-181
SP - 407
EP - 410
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - PART 1
ER -