Helium release and microstructure of neutron-irradiated SiC ceramics

Kazunari Sasaki, T. Yano, T. Maruyama, T. Iseki

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)407-410
Number of pages4
JournalJournal of Nuclear Materials
Volume179-181
Issue numberPART 1
DOIs
Publication statusPublished - Jan 1 1991

Fingerprint

Helium
Neutrons
helium
ceramics
neutrons
microstructure
Microstructure
Powders
helium atoms
Vacancies
fluence
Grain boundaries
bubbles
grain boundaries
Gases
Transmission electron microscopy
Atoms
Temperature
transmission electron microscopy
temperature

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

Cite this

Helium release and microstructure of neutron-irradiated SiC ceramics. / Sasaki, Kazunari; Yano, T.; Maruyama, T.; Iseki, T.

In: Journal of Nuclear Materials, Vol. 179-181, No. PART 1, 01.01.1991, p. 407-410.

Research output: Contribution to journalArticle

Sasaki, Kazunari ; Yano, T. ; Maruyama, T. ; Iseki, T. / Helium release and microstructure of neutron-irradiated SiC ceramics. In: Journal of Nuclear Materials. 1991 ; Vol. 179-181, No. PART 1. pp. 407-410.
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