Helium release and microstructure of neutron-irradiated SiC ceramics

K. Sasaki; T. Yano; T. Maruyama; T. Iseki

doi:10.1016/0022-3115(91)90111-J

Helium release and microstructure of neutron-irradiated SiC ceramics

K. Sasaki
, T. Yano
, T. Maruyama
, T. Iseki

Research output: Contribution to journal › Article › peer-review

42 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 language	English
Pages (from-to)	407-410
Number of pages	4
Journal	Journal of Nuclear Materials
Volume	179-181
Issue number	PART 1
DOIs	https://doi.org/10.1016/0022-3115(91)90111-J
Publication status	Published - 1991
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
General Materials Science
Nuclear Energy and Engineering

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10.1016/0022-3115(91)90111-J

Cite this

@article{6f61d494f42b45fcb3b3361174b11d2d,

title = "Helium release and microstructure of neutron-irradiated SiC ceramics",

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.",

author = "K. Sasaki and T. Yano and T. Maruyama and T. Iseki",

note = "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.",

year = "1991",

doi = "10.1016/0022-3115(91)90111-J",

language = "English",

volume = "179-181",

pages = "407--410",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier B.V.",

number = "PART 1",

}

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.

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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 -

Helium release and microstructure of neutron-irradiated SiC ceramics

Abstract

All Science Journal Classification (ASJC) codes

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