Helium irradiation behavior of tungsten-niobium alloys under different ion energies

Meng Yao Xu, Lai Ma Luo, Yu Feng Zhou, Xiang Zan, Yue Xu, Qiu Xu, Kazutoshi Tokunaga, Xiao Yong Zhu, Yu Cheng Wu

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Tungsten is a primary material in plasma-facing components (PFCs), but several disadvantages limit its application in fusion reactors. This work examined tungsten–niobium (W–Nb) alloys as potential PFC materials and investigated their response to low-energy helium ion irradiation. W–Nb powders were milled for 25 and 36 h, and the W–Nb samples were exposed to 50 and 80 eV helium ion irradiation with a flux of 1.5 × 1022 ions/m2 s at 1230 °C. The sample with a dense structure and obtained after a 25-h milling exhibited enhanced anti-irradiation performance. Sufficient energy can be provided to promote helium ion migration in the matrix, resulting in the formation of nanotendrils. Furthermore, in W–Nb alloys, the Nb-rich regions are more attractive to helium ions and thus provide protection to the tungsten matrix.

Original languageEnglish
Pages (from-to)7-12
Number of pages6
JournalFusion Engineering and Design
Volume132
DOIs
Publication statusPublished - Jul 2018

All Science Journal Classification (ASJC) codes

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

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