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Mater Sci Nanotechnol 2017
Volume 1 Issue 3
Magnetic Materials 2017
Page 91
October 09-10, 2017 London, UK
International Conference on
Nanoscale cascade dynamic effects and ion
beam treatment of soft magnetic materials
Vladimir V Ovchinnikov
Institute of Electrophysics, UD, RAS, Russia
C
lassical radiation physics describes well several known
phenomena (radiation embrittlement, swelling, radiation
creep) based on relatively slow processes of thermo- and
radiation-enhanced diffusion. Mechanisms based on the
description of the defects migration processes cannot
however, explain the small-dose effect under neutron and
low-dose long-range effect under ion irradiation. In fact,
in both cases we are talking about instant structural-phase
rearrangements, at large distances with an insignificant
number of displacements per atom (sometimes<0.001).
The author and his colleagues found many arguments
in favor of the decisive role of nanoscale dynamic effects
in explaining the effect of cascade-forming radiation on
matter. The presentation takes a brief look at the model
considering the explosive energy release in the regions of the
dense cascades of atomic displacements and the emission of
powerful post-cascade solitary waves that initiate structural-
phase transformations at their front in metastable media,
theoretically, at unlimited distances (in practice at least up to
several millimeters under ion irradiation, at R
p
< 1 μM; Rp is
the projected ion range). The application part of the report
contains an overview of more than a dozen of articles of the
author and his colleagues and the latest results on the effect of
ion beams on the phase composition, atomic distribution, the
grain and magnetic domain structure, as well as the magnetic
properties of soft magnetic materials such as transformer steel
(bands 0.1-0.35 mm thick), fine met (25 μM), perm alloy, and
carbonyl iron powders. Mossbauer, X-ray diffraction, and
TEM data are used.
viae05@rambler.ruMaterials Science and Nanotechnology