Abstract
The valence state of copper ions and the phase composition of copper monoxide CuO subjected to bombardment by He+ ions and explosive shock waves are studied by the methods of x-ray photoelectron spectroscopy (XPS) and x-ray emission spectroscopy (XES). Measurements of photoelectron Cu 2p and emission O K α spectra revealed a decrease in the concentration of Cu2+ ions and partial reduction of CuO to Cu2O as a result of both ion bombardment and shock-wave loading. The concentration of the Cu2O phase attained values of 10–15%. The Cu2O phase is revealed by the XPS and XES methods even at concentrations lower than its threshold concentration for detection by x-ray diffraction measurements. This points to the effectiveness of XPS and XES techniques in studying nanocrystalline materials and defect structures containing finely dispersed inclusions. A model for the emergence of Cu2O due to the formation of charged clusters under the action of stress waves is proposed.
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Translated from Fizika Tverdogo Tela, Vol. 44, No. 7, 2002, pp. 1318–1325.
Original Russian Text Copyright © 2002 by Gizhevski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\), Galakhov, Zatsepin, Elokhina, Belykh, Kozlov, Naumov, Arbuzov, Shal’nov, Neumann.
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Gizhevskii, B.A., Galakhov, V.R., Zatsepin, D.A. et al. Phase transformations in CuO caused by bombardment by He+ ions and by the action of spherical shock waves. Phys. Solid State 44, 1380–1387 (2002). https://doi.org/10.1134/1.1494639
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DOI: https://doi.org/10.1134/1.1494639