Wear resistance of the ion-modified surface of zirconium-alloy tubes irradiated by He+ and Ar+ ion beams with wide energy spectra |
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| Authors: | B A Kalin N V Volkov and E A Anan’eva |
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| Institution: | (1) Department of Polymer Engineering, University of Chemical Technology and Metallurgy, 8 Kl. Ohridski Blvd, 1756 Sofia, Bulgaria;(2) Institute of Biophysics, BAS, 1113 Sofia, Bulgaria |
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| Abstract: | The results of investigating the wear resistance of E110 alloy samples irradiated by a He+ + Ar+ beam with a wide energy spectrum are presented. Surface modification under irradiation by an Ar+ beam at doses higher than 2 × 1018 ion/cm2 is shown to cause substantial enhancement of the wear resistance of samples because the structural homogeneity of near surface
layers increases, the surface roughness decreases, and its microhardness increases. The application of a mechanical-geometrical
wear model based on the experimental wear characteristics determined during accelerated tests indicates that the thinning
of an alloy cladding can reach rates of 10−6–10−3 mm/s, which agree satisfactorily with data obtained in other simulation experiments. The presence of an oxide film changes
a wear process characterized by an abrasive component. |
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