Surface physics, thin films

Effect of the accelerating voltage during pulsed irradiation with Cr$^+$ ions on the surface layer composition of carbon steel St3

V. L. Vorobyov^a, P. V. Bykov^a, V. Ya. Bayankin^a, S. G. Bystrov^a, V. E. Porsev^a, O. A. Bureev<sup>b

a</sup> Physical-Technical Institute of the Ural Branch of the Russian Academy of Sciences
^b Institute of Electrophysics, Ural Branch, Russian Academy of Sciences, Ekaterinburg

Abstract: The formation of Cr$_2$O$_3$, CrO$_2$, CrO$_3$ and FeO, Fe$_2$O$_3$ oxides in surface layers of steel St3 samples irradiated with Cr$^+$ ions has been revealed. The oxide content decreases with increasing accelerating voltage, which is caused by a more intense surface sputtering and a temperature increase. It has been found that the hardness of a surface layer $\sim$ 250 nm deep increases by 20% after irradiation with an accelerating voltage of 20 kV.

Received: 30.06.2014
Revised: 24.09.2014

 English version: Physics of the Solid State, 2015, 57:3, 631–636

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