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高温材料处理:国际期刊
SJR: 0.137 SNIP: 0.341 CiteScore™: 0.43

ISSN 打印: 1093-3611
ISSN 在线: 1940-4360

高温材料处理:国际期刊

DOI: 10.1615/HighTempMatProc.2017022843
pages 91-107

THE ROLE OF THERMAL SPIKES IN RADIATION STABILITY OF METAL NANOWIRES UNDER EXPOSURE TO CONTINUOUS AND POWERFUL PULSED ION BEAMS

S. A. Bedin
Institute of Electrophysics, Ural Branch, Russian Academy of Sciences, 106 Amundsen Str., Yekaterinburg, 620016, Russia
V. V. Ovchinnikov
Institute of Electrophysics, Ural Branch, Russian Academy of Sciences, 106 Amundsen Str., Yekaterinburg, 620016, Russia; El'tsin Ural Federal University, 19 Mir Str., Yekaterinburg, 620002, Russia
Natali V. Gushchina
Institute of Electrophysics, Ural Branch, Russian Academy of Sciences, 106 Amundsen Str., Yekaterinburg, 620016, Russia
F. F. Makhin'ko
Institute of Electrophysics, Ural Branch, Russian Academy of Sciences, 106 Amundsen Str., Yekaterinburg, 620016, Russia
G. E. Remnev
Research Institute of High Voltage, 30 Lenin Ave., Tomsk, 634050, Russia
S. K. Pavlov
Institute of Electrophysics, Ural Branch, Russian Academy of Sciences, 106 Amundsen Str., Yekaterinburg, 620016, Russia; Research Institute of High Voltage, 30 Lenin Ave., Tomsk, 634050, Russia
N. N. Gerasimenko
Institute of Electrophysics, Ural Branch, Russian Academy of Sciences, 106 Amundsen Str., Yekaterinburg, 620016, Russia; National Research University of Electronic Technology (MIET), 1 Shokin Sq., Zelenograd, Moscow Region, 124498, Russia
D. L. Zagorskiy
Institute of Electrophysics, Ural Branch, Russian Academy of Sciences, 106 Amundsen Str., Yekaterinburg, 620016, Russia; Shubnikov Institute of Crystallography of Federal Scientific Research Center "Crystallography and Photonics," Russian Academy of Sciences, 59 Leninsky Ave., Moscow, 119333, Russia; Gubkin Russian State University of Oil and Gas, 65 Leninsky Ave., Moscow, 119991, Russia

ABSTRACT

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.


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