Laminated composites using potassium doped tungsten

Shuhei Nogami, Takefumi Hazama, Hiroyuki Noto, Takuya Nagasaka, Akira Hasegawa

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Highly deformed tungsten (W) thin foils could show excellent low temperature ductility, even at room temperature. A laminated composite using pure W foils has been proposed for the application to the plasma-facing material of divertors, which is a composite material consisting of stacked pure W thin foils and interlayer materials. However, the degradation of low temperature ductility attributed to the recrystallization and neutron irradiation of pure W foils is one of the concerns of the laminated composite using pure W foils. Potassium (K) doping is known as one of the methods to suppress recrystallization and to improve neutron irradiation resistance, in addition to improving the low temperature fracture toughness. Therefore, a laminated composite using K-doped W foils was developed in the present study, which has the possibility to show improved mechanical properties even after the neutron irradiation compared to the pure W foil laminated composite. The K-doped W foil laminates using an interlayer made of pure cupper (Cu) and pure vanadium (V) were fabricated at 900 and 1250 °C in the present study. An enough ductility at room temperature was observed in these laminates, even after the fabrication at 1250 °C.

Original languageEnglish
Article number111894
JournalFusion Engineering and Design
Volume161
DOIs
Publication statusPublished - 2020 Dec

Keywords

  • Ductility
  • Laminated composite
  • Potassium doping
  • Recrystallization
  • Tungsten

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

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