TY - JOUR
T1 - Release and diffusion rate of helium in neutron-irradiated SiC
AU - Pramono, Yudi
AU - Sasaki, Kazunari
AU - Yano, Toyohiko
N1 - Funding Information:
This work was partly supported by a Grant-in-Aid for Scientific Research from JSPS. We would like to thank the staff in O-Arai Branch, Institute of Materials Research, Tohoku University, for their assistance in irradiation experiment.
PY - 2004/7
Y1 - 2004/7
N2 - Helium release measurements and diffusion coefficient calculations of helium in a neutron-irradiated α-SiC have been carried out in the temperature range of 750 1,260°C. The powder was obtained from SiC ceramics containing B4C, of which 10B concentration was 4.2×1016atom/mg. Neutron irradiation was conducted up to a fluence of 2.8×1024n/m2 (E>0.1 MeV) -300°C. The diffusion coefficients were calculated for the temperature region of 750-1,060°C with time range of 0-10 min. The diffusion coefficient of helium for SiC containing B4C was D (cm2/s)=1.38×1010exp[—0.91±0.07 (eV/atom)/kT]. Dissociative and interstitial diffusion mechanisms were supposed. Diffusion coefficients were reduced above -1,160°C probably due to accelerated migration of vacancies.
AB - Helium release measurements and diffusion coefficient calculations of helium in a neutron-irradiated α-SiC have been carried out in the temperature range of 750 1,260°C. The powder was obtained from SiC ceramics containing B4C, of which 10B concentration was 4.2×1016atom/mg. Neutron irradiation was conducted up to a fluence of 2.8×1024n/m2 (E>0.1 MeV) -300°C. The diffusion coefficients were calculated for the temperature region of 750-1,060°C with time range of 0-10 min. The diffusion coefficient of helium for SiC containing B4C was D (cm2/s)=1.38×1010exp[—0.91±0.07 (eV/atom)/kT]. Dissociative and interstitial diffusion mechanisms were supposed. Diffusion coefficients were reduced above -1,160°C probably due to accelerated migration of vacancies.
UR - http://www.scopus.com/inward/record.url?scp=3342979959&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=3342979959&partnerID=8YFLogxK
U2 - 10.1080/18811248.2004.9715542
DO - 10.1080/18811248.2004.9715542
M3 - Article
AN - SCOPUS:3342979959
SN - 0022-3131
VL - 41
SP - 751
EP - 755
JO - Journal of Nuclear Science and Technology
JF - Journal of Nuclear Science and Technology
IS - 7
ER -