Examination of electrical insulating performance of Er2O3 ceramic coating under ion beam irradiation

T. Tanaka, B. Tsuchiya, F. Sato, T. Shikama, T. Iida, T. Muroga

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


Electrical insulating performance of Er2O3 coating samples with thicknesses of 1.0-2.4 μm have been examined under 1 MeV H+ and 2.8 MeV He+ ion beam irradiations at room temperature. The intrinsic conductivity of one sample has not changed significantly after the irradiation corresponding to the estimated damage of 2.2 × 10-2 dpa (displacement per atom). A strong electric field of 1 kV/mm applied under the irradiation has not affected the conductivity of the sample. In the other sample, the intrinsic conductivities measured after irradiations have increased gradually with the ion fluence, while the estimated damage was as low as ∼1 × 10-3 to 1 × 10-2 dpa. Since significant change was not observed in the beam-induced conductivities measured under beam irradiations, local current paths might be generated in the coating layer or at small pits observed on the coating surfaces due to the irradiations.

Original languageEnglish
Pages (from-to)1300-1303
Number of pages4
JournalFusion Engineering and Design
Issue number7-9
Publication statusPublished - 2008 Dec 1


  • Ceramic
  • Coating
  • Electrical conductivity
  • Electrical degradation
  • ErO
  • Ion beam irradiation

ASJC Scopus subject areas

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


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