Ion induced millimetre-scale structures growth on metal surfaces

Polished polycrystalline Plansee tungsten (W) sample with purity 99.99 wt% and 0.75 mm thickness has been exposed to intense argon (Ar) ion beam with average energy of 2 keV and etched through in the centre. As a result, castle-like structures with strong asymmetry and with the height of  >200 µm...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Beam interactions with materials and atoms, 2018-04, Vol.420, p.46-49
Main Authors: Girka, O., Bizyukov, O., Balkova, Y., Myroshnyk, M., Bizyukov, I., Bogatyrenko, S.
Format: Article
Language:English
Subjects:
Activated surface mobility
Ion-induced structures
Relaxation
Stresses
Surface morphology
Tungsten
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Summary:Polished polycrystalline Plansee tungsten (W) sample with purity 99.99 wt% and 0.75 mm thickness has been exposed to intense argon (Ar) ion beam with average energy of 2 keV and etched through in the centre. As a result, castle-like structures with strong asymmetry and with the height of  >200 µm have been formed. Structures can be observed by naked eyes and with scanning-electron microscopy (SEM). It has been revealed, that the structures have been formed not immediately, but at the later stages of irradiation. Primary factors favouring the formation for the structures are relaxation of the surface stresses and activated surface mobility of atoms.
ISSN:0168-583X
1872-9584
DOI:10.1016/j.nimb.2018.02.002