Effect of proton irradiation on the defect evolution of Zr/Nb nanoscale multilayers

Roman Laptev, Anton Lomygin, Dmitriy Krotkevich, Maxim Syrtanov, Egor Kashkarov, Yuriy Bordulev, Krzysztof Siemek, Andrey Kobets

Research output: Contribution to journalArticle

Abstract

Nanoscale multilayer coatings (NMCs) with different crystal structures are considered as capable of self-healing after radiation damage due to the recombination of vacancies and interstitials. This work is focused on a defect distribution study of NMCs based on Zr/Nb layers (25/25 nm and 100/100 nm) after proton irradiation. Coatings with a total thickness of 1.05 ± 0.05 µm were irradiated by 900-keV protons using a pelletron-type electrostatic accelerator with an ion current of 2 µA for durations of 60 min to 120 min. The influence of the irradiation effect was studied by X-ray diffraction analysis (XRD), glow discharge optical emission spectrometry (GD–OES), and Doppler broadening spectroscopy using a variable energy positron beam. The results obtained by these methods are compatible and indicate that defect concentration of Zr/Nb NMCs remains unchanged or slightly decreases with increasing irradiation time.

Original languageEnglish
Article number535
JournalMetals
Volume10
Issue number4
DOIs
Publication statusPublished - Apr 2020

Keywords

  • Defects
  • GD-OES
  • Microstructure
  • Nanoscale multilayer coating
  • Positron annihilation spectroscopy
  • Proton irradiation
  • XRD
  • Zr/Nb

ASJC Scopus subject areas

  • Materials Science(all)

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