Release and diffusion rate of helium in neutron-irradiated SiC

Yudi Pramono, Kazunari Sasaki, Toyohiko Yano

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)751-755
Number of pages5
Journaljournal of nuclear science and technology
Volume41
Issue number7
DOIs
Publication statusPublished - Jul 2004

Fingerprint

Helium
Neutrons
diffusion coefficient
helium
neutrons
neutron irradiation
Neutron irradiation
fluence
interstitials
Vacancies
ceramics
temperature
coefficients
Powders
Atoms
Temperature
atoms

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

Cite this

Release and diffusion rate of helium in neutron-irradiated SiC. / Pramono, Yudi; Sasaki, Kazunari; Yano, Toyohiko.

In: journal of nuclear science and technology, Vol. 41, No. 7, 07.2004, p. 751-755.

Research output: Contribution to journalArticle

@article{c3c0f012905942e4b783837869e0df94,
title = "Release and diffusion rate of helium in neutron-irradiated SiC",
abstract = "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.",
author = "Yudi Pramono and Kazunari Sasaki and Toyohiko Yano",
year = "2004",
month = "7",
doi = "10.1080/18811248.2004.9715542",
language = "English",
volume = "41",
pages = "751--755",
journal = "Journal of Nuclear Science and Technology",
issn = "0022-3131",
publisher = "Atomic Energy Society of Japan",
number = "7",

}

TY - JOUR

T1 - Release and diffusion rate of helium in neutron-irradiated SiC

AU - Pramono, Yudi

AU - Sasaki, Kazunari

AU - Yano, Toyohiko

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

VL - 41

SP - 751

EP - 755

JO - Journal of Nuclear Science and Technology

JF - Journal of Nuclear Science and Technology

SN - 0022-3131

IS - 7

ER -