High heat load properties of nanostructured, recrystallized W-1.1TiC

K. Tokunaga, H. Kurishita, H. Arakawa, S. Matsuo, T. Hotta, K. Araki, Y. Miyamoto, T. Fujiwara, K. Nakamura, T. Takida, M. Kato, A. Ikegaya

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Steady state (1973 K, 180 s) and repeated (723 K-1524 K, 380 times) heat loading experiments of ITER grade W and toughened, fine-grained, recrystallized W-1.1TiC (TFGR W-1.1TiC) have been performed using an electron beam irradiation system. In ITER grade W, the irradiation around 1973 K causes recrystallization and grain growth up to the average diameters of 50-100 μm. Repeated irradiations cause significant surface roughening, cracking at grain boundaries and surface exfoliation. On the other hand, TFGR W-1.1TiC does not exhibit any surface roughening or cracking after repeated heat loading although grain boundaries on the surface of TFGR W-1.1TiC can be observed after irradiation at around 1973 K 180 s by steady state heat loading.

Original languageEnglish
Pages (from-to)S297-S301
JournalJournal of Nuclear Materials
Volume442
Issue number1-3 SUPPL.1
DOIs
Publication statusPublished - Jun 17 2013

    Fingerprint

All Science Journal Classification (ASJC) codes

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

Cite this

Tokunaga, K., Kurishita, H., Arakawa, H., Matsuo, S., Hotta, T., Araki, K., ... Ikegaya, A. (2013). High heat load properties of nanostructured, recrystallized W-1.1TiC. Journal of Nuclear Materials, 442(1-3 SUPPL.1), S297-S301. https://doi.org/10.1016/j.jnucmat.2013.04.094