Japanese activities of the R&D on silicon carbide composites in the broader approach period and beyond

Takashi Nozawa, Kazumi Ozawa, Chang Ho Park, Joon Soo Park, Akira Kohyama, Akira Hasegawa, Shuhei Nogami, Tatsuya Hinoki, Sosuke Kondo, Toyohiko Yano, Tamaki Shibayama, Bun Tsuchiya, Tatsuo Shikama, Shinji Nagata, Teruya Tanaka, Hirotomo Iwakiri, Yasushi Yamamoto, Satoshi Konishi, Ryuta Kasada, Masatoshi KondoTomoaki Kunugi, Takehiko Yokomine, Yoshitaka Ueki, Nariaki Okubo, Tomitsugu Taguchi, Hiroyasu Tanigawa

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The R&D on SiC/SiC composites under the broader approach (BA) activities between Japan and the EU for fusion DEMO developed a fundamental database of mechanical (Task-1) and physical/chemical (Task-2) properties, with a primary target of the application of SiC/SiC composites as functional structure to be used in the dual coolant breeding blanket concept. This paper aims to summarize previous 10-years activities of the R&D of Japan and to provide the key deliverables toward the DEMO design. In Task-1, good creep and fatigue durability were first demonstrated. Besides, in-plane and inter-laminar strength anisotropy maps at elevated temperatures were comprehensively identified. In parallel, the irradiation effects of SiC materials were specifically determined as input parameters of the analytical model to provide for the irradiation-induced residual stresses. In Task-2, the apparent dose-dependence of the radiation-induced electrical conductivity and the indicative radiation-induced electrical degradation was identified by various irradiation sources. In addition, good gas confinement was identified. Furthermore, no accelerated corrosion for duration of 3000 h at below 1173 K was first demonstrated. With these achievements, it is suggested that the in-vessel component technology, e.g., material corrosion database development, activated corrosion product evaluation code development, compact module tests for validation of the key functions of the components, technology integration assessment for fusion nuclear tests, etc., should be further developed toward DEMO in near-term.

Original languageEnglish
Pages (from-to)582-590
Number of pages9
JournalJournal of Nuclear Materials
Volume511
DOIs
Publication statusPublished - 2018 Dec 1

Keywords

  • Broader approach activities
  • Chemical properties
  • Fusion reactor materials
  • Irradiation effects
  • Mechanical properties
  • Physical properties
  • SiC/SiC composites

ASJC Scopus subject areas

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

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  • Cite this

    Nozawa, T., Ozawa, K., Park, C. H., Park, J. S., Kohyama, A., Hasegawa, A., Nogami, S., Hinoki, T., Kondo, S., Yano, T., Shibayama, T., Tsuchiya, B., Shikama, T., Nagata, S., Tanaka, T., Iwakiri, H., Yamamoto, Y., Konishi, S., Kasada, R., ... Tanigawa, H. (2018). Japanese activities of the R&D on silicon carbide composites in the broader approach period and beyond. Journal of Nuclear Materials, 511, 582-590. https://doi.org/10.1016/j.jnucmat.2018.05.045