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 language | English |
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Article number | 535 |
Journal | Metals |
Volume | 10 |
Issue number | 4 |
DOIs | |
Publication status | Published - 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)