Journal of Materials Science

, Volume 26, Issue 9, pp 2379–2388 | Cite as

Carbon monoxide-silicon carbide interaction in HTGR fuel particles

  • Kazuo Minato
  • Toru Ogawa
  • Satoru Kashimura
  • Kousaku Fukuda
  • Ishio Takahashi
  • Michio Shimizu
  • Yoshinobu Tayama
Papers
Received:
Accepted:

Abstract

The corrosion of the coating-layers of silicon carbide (SiC) by carbon monoxide (CO) was observed in irradiated Triso-coated uranium dioxide particles, used in high-temperature gas-cooled reactors, by optical microscopy and electron probe micro-analysis. The mechanical failure of the coating-layer of inner dense pyrolytic carbon (IPyC) was often observed beside the area of the SiC corrosion. The grain boundaries of the SiC seemed to be selectively corroded during early stages of corrosion. Silicon dioxide, or more stable (Si, Ce, Ba) oxide, was accumulated at the buffer-IPyC and IPyC-SiC interfaces on the cold side of the particles and the formation of (Pd, Rh, Ru, Tc, Mo) silicides was observed in the fuel kernels, which probably resulted from the vapour transport of silicon monoxide from the corroded areas.

Keywords

Carbide Uranium Silicon Carbide Mechanical Failure Vapour Transport 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Chapman and Hall Ltd 1991

Authors and Affiliations

  • Kazuo Minato
    • 1
  • Toru Ogawa
    • 1
  • Satoru Kashimura
    • 1
  • Kousaku Fukuda
    • 1
  • Ishio Takahashi
    • 1
    • 2
  • Michio Shimizu
    • 3
  • Yoshinobu Tayama
    • 3
  1. 1.Departments of Fuels and Materials ResearchJapan Atomic Energy Research InstituteIbaraki-kenJapan
  2. 2.Department of Research Reactor OperationJapan Atomic Energy Research InstituteIbaraki-kenJapan
  3. 3.Department of JMTR ProjectJapan Atomic Energy Research InstituteIbaraki-kenJapan

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