High-temperature threshold of damage of SiC by swift heavy ions

Zainutdinov D.I. Borodin V.A. Gorbunov S.A. Medvedev N. Rymzhanov R.A. Sorokin M.V. Voronkov R.A. Volkov A.E.
31 January 2025 Elsevier Ltd

Journal of Alloys and Compounds
2025 #1013

At ambient conditions, SiC is resistant to irradiation with swift heavy ions (SHI) decelerating in the electronic stopping regime. However, there is no experimental data on the SiC irradiation at elevated temperatures. To investigate this problem, we evaluate the stability of SiC to SHI impacts at high temperatures up to 2200 K. We combine a transport Monte-Carlo simulation, describing excitation of the electronic and atomic systems using temperature-dependent scattering cross-sections, with molecular-dynamic modeling of the lattice response to the excitation. We demonstrate that increasing irradiation temperature increases the energy transferred to the atomic lattice from the excited electronic system. This material heating leads to the formation of a stable nanometric damaged core along the trajectory of 710 MeV Bi ion when the irradiation temperature overcomes the threshold of ∼1800 K. In this case, a chain of nanometric voids forms along the ion trajectory due to the mass transport from the track core by edge dislocations. Voids of larger sizes appear at higher irradiation temperatures. At lower irradiation temperatures, the damaged regions recrystallize completely within ∼100 ps after the ion passage.

Ceramic , Dislocations , Electron-phonon interactions , Ion-solid interactions , Modeling , Multiscale

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P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Leninskij pr., 53, Moscow, 119991, Russian Federation
NRC Kurchatov Institute, Moscow, 123182, Russian Federation
Institute of Physics, Czech Academy of Sciences, Na Slovance 1999/2, Prague, 182 21, Czech Republic
Institute of Plasma Physics, Czech Academy of Sciences, Za Slovankou 1782/3, Prague, 182 00, Czech Republic
Flerov Laboratory of Nuclear Research, Joint Institute for Nuclear Research, Dubna, 141980, Russian Federation
Institute of Nuclear Physics, Almaty, 050032, Kazakhstan

P.N. Lebedev Physical Institute of the Russian Academy of Sciences
NRC Kurchatov Institute
Institute of Physics
Institute of Plasma Physics
Flerov Laboratory of Nuclear Research
Institute of Nuclear Physics

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