%0 Journal Article %A Bedin, S. A. %A Ovchinnikov, V. V. %A Gushchina, Natali V. %A Makhin'ko, F. F. %A Remnev, G. E. %A Pavlov, S. K. %A Gerasimenko, N. N. %A Zagorskiy, D. L. %D 2017 %I Begell House %K nanowires, template synthesis, radiation stability, continuous and powerful pulsed ion beams, thermal spikes, nanoscale dynamic effects %N 2 %P 91-107 %R 10.1615/HighTempMatProc.2017022843 %T THE ROLE OF THERMAL SPIKES IN RADIATION STABILITY OF METAL NANOWIRES UNDER EXPOSURE TO CONTINUOUS AND POWERFUL PULSED ION BEAMS %U https://www.dl.begellhouse.com/journals/57d172397126f956,77c7b2b35327a7a9,13e2a1b903f5272d.html %V 21 %X The aim of this work is to investigate radiation stability of nanowires of pure Ni and iron–nickel alloy Fe0.56Ni0.44 (fabricated by matrix synthesis using polymer track membranes) under irradiation with continuous beams of Ar+ and Xe+ ions (E = 20 keV, j = 300 μA/cm2) and on exposure to a powerful pulsed 85% C+ + 15% H+ ion beam under conditions of generation of only one ion pulse (E = 250 keV, j = 100 A/cm2, τ = 90 ns). The assumption is made that the thermalized regions of dense cascades of atomic displacements play an important role in changing the structure of nanowires. These regions are nanoscale zones of explosive energy release (thermal spikes) heated to several thousand degrees (eventually they are observed on the surface of nanowires in the form of nanosized frozen droplets). Calculations have shown that integral heating of nanowires by ion beams in a continuous mode is insufficient for their total melting. The answer to a similar question about global melting during irradiation in a pulse mode depends on the orientation of nanowires relative to the ion beam. Bending and fracture of nanowires undergone melting can be explained by the propagation of post cascade shock waves. %8 2018-01-31