TY  - CONF
AU  - Rymzhanov, Ruslan
AU  - O’Connell, Jacques
AU  - Medvedev, Nikita
AU  - Ćosić, Marko
AU  - Skuratov, Vladimir
AU  - Janse van Vuuren, Arno
AU  - Gorbunov, Sergey
AU  - Volkov, Alexander
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12378
AB  - A combined Monte Carlo (MC) and Molecular Dynamics (MD) approach enables us to study in detail effects of different stages of swift heavy ion (SHI) track formation. The MC model (TREKIS [1]) describes excitation of the electronic system and energy transfer to the lattice providing initial conditions for the MD simulations of subsequent lattice response. We discuss here the kinetics of individual track formation, tracks overlap and surface modifications in some amorphizable (YAG, Mg2SiO4) and non-amorphizable (Al2O3, MgO, CaF2) solids irradiated with SHIs. High-resolution transmission electron microscopy analysis of samples irradiated with Xe and Bi ions is used to validate the developed model and to investigate the link between the basic properties of the studied materials and the kinetics of structural changes of the targets. We demonstrate the following: 1) The size and morphology of individual latent tracks and tracks overlap at high fluences are strongly affected by recrystallization of the transiently disordered zone [2]. 2) Different spectra of electrons generated by ions of different energies result in a velocity effect of track formation and a mismatch between the position of the maximal damage and the Bragg peak of the projectile energy loss [3]. 3) Protrusion of molten material and a final structure of surface defects induced by an SHI are governed by mobility of target atoms, surface tensions and recrystallization of a material during the ultra-short cooling period [4]. 4) A target thickness affects formation of surface defects under SHI irradiation: the thinnest layers form a through hole, semispherical and spherical hillocks are created after an ion impact at medium thicknesses, whereas nanoparticle emission occurs from thick layers [5]. 5) Impact of an SHI under a grazing incidence results in formation of a groove-like structure vs. a chain of nanohillocks depending on material and irradiation properties. It can be concluded that hydrodynamic (Rayleigh) instability of molten material on the surface dominates in hillock chain formation over the effect of the dependence of ion energy loss on the impact parameter.
PB  - Helsinki, Finland : University of Helsinki
C3  - ICACS & SHIM 2022 : 29th International conference on atomic collisions in solids & 11th International symposium on swift heavy ions in matter : Book of abstracts
T1  - Comprehensive model of SHI impacts: from ion passage to track formation
SP  - 39
EP  - 39
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12378
ER  - 

@conference{
author = "Rymzhanov, Ruslan and O’Connell, Jacques and Medvedev, Nikita and Ćosić, Marko and Skuratov, Vladimir and Janse van Vuuren, Arno and Gorbunov, Sergey and Volkov, Alexander",
year = "2022",
abstract = "A combined Monte Carlo (MC) and Molecular Dynamics (MD) approach enables us to study in detail effects of different stages of swift heavy ion (SHI) track formation. The MC model (TREKIS [1]) describes excitation of the electronic system and energy transfer to the lattice providing initial conditions for the MD simulations of subsequent lattice response. We discuss here the kinetics of individual track formation, tracks overlap and surface modifications in some amorphizable (YAG, Mg2SiO4) and non-amorphizable (Al2O3, MgO, CaF2) solids irradiated with SHIs. High-resolution transmission electron microscopy analysis of samples irradiated with Xe and Bi ions is used to validate the developed model and to investigate the link between the basic properties of the studied materials and the kinetics of structural changes of the targets. We demonstrate the following: 1) The size and morphology of individual latent tracks and tracks overlap at high fluences are strongly affected by recrystallization of the transiently disordered zone [2]. 2) Different spectra of electrons generated by ions of different energies result in a velocity effect of track formation and a mismatch between the position of the maximal damage and the Bragg peak of the projectile energy loss [3]. 3) Protrusion of molten material and a final structure of surface defects induced by an SHI are governed by mobility of target atoms, surface tensions and recrystallization of a material during the ultra-short cooling period [4]. 4) A target thickness affects formation of surface defects under SHI irradiation: the thinnest layers form a through hole, semispherical and spherical hillocks are created after an ion impact at medium thicknesses, whereas nanoparticle emission occurs from thick layers [5]. 5) Impact of an SHI under a grazing incidence results in formation of a groove-like structure vs. a chain of nanohillocks depending on material and irradiation properties. It can be concluded that hydrodynamic (Rayleigh) instability of molten material on the surface dominates in hillock chain formation over the effect of the dependence of ion energy loss on the impact parameter.",
publisher = "Helsinki, Finland : University of Helsinki",
journal = "ICACS & SHIM 2022 : 29th International conference on atomic collisions in solids & 11th International symposium on swift heavy ions in matter : Book of abstracts",
title = "Comprehensive model of SHI impacts: from ion passage to track formation",
pages = "39-39",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12378"
}

Rymzhanov, R., O’Connell, J., Medvedev, N., Ćosić, M., Skuratov, V., Janse van Vuuren, A., Gorbunov, S.,& Volkov, A.. (2022). Comprehensive model of SHI impacts: from ion passage to track formation. in ICACS & SHIM 2022 : 29th International conference on atomic collisions in solids & 11th International symposium on swift heavy ions in matter : Book of abstracts
Helsinki, Finland : University of Helsinki., 39-39.
https://hdl.handle.net/21.15107/rcub_vinar_12378

Rymzhanov R, O’Connell J, Medvedev N, Ćosić M, Skuratov V, Janse van Vuuren A, Gorbunov S, Volkov A. Comprehensive model of SHI impacts: from ion passage to track formation. in ICACS & SHIM 2022 : 29th International conference on atomic collisions in solids & 11th International symposium on swift heavy ions in matter : Book of abstracts. 2022;:39-39.
https://hdl.handle.net/21.15107/rcub_vinar_12378 .

Rymzhanov, Ruslan, O’Connell, Jacques, Medvedev, Nikita, Ćosić, Marko, Skuratov, Vladimir, Janse van Vuuren, Arno, Gorbunov, Sergey, Volkov, Alexander, "Comprehensive model of SHI impacts: from ion passage to track formation" in ICACS & SHIM 2022 : 29th International conference on atomic collisions in solids & 11th International symposium on swift heavy ions in matter : Book of abstracts (2022):39-39,
https://hdl.handle.net/21.15107/rcub_vinar_12378 .

TY  - JOUR
AU  - Sohatsky, Alexander S.
AU  - Skuratov, Vladimir Alexeevich
AU  - Janse Van Vuuren, Arno
AU  - Van Tiep, Nguyen
AU  - O'Connell, Jacques H.
AU  - Ibraeva, A.
AU  - Zdorovets, Maxim V.
AU  - Petrović, Srđan M.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8558
AB  - Combination of room temperature He ion implantation and swift heavy ion (SHI) irradiation in the multiple ion track overlapping regime has been used to study helium porosity in EP450 ODS steel containing crystalline or fully amorphous Y-Ti nano-oxides. It was found that helium bubbles formed during post-irradiation annealing have much better adhesion to amorphized precipitates in comparison with crystalline ones. However, this does not affect the overall porosity of the alloy which is defined by helium bubbles formed on structural defects inside the ferrite grain body and on grain boundaries.
T2  - Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
T1  - Helium in swift heavy ion irradiated ODS alloys
VL  - 460
SP  - 80
EP  - 85
DO  - 10.1016/j.nimb.2019.04.007
ER  - 

@article{
author = "Sohatsky, Alexander S. and Skuratov, Vladimir Alexeevich and Janse Van Vuuren, Arno and Van Tiep, Nguyen and O'Connell, Jacques H. and Ibraeva, A. and Zdorovets, Maxim V. and Petrović, Srđan M.",
year = "2019",
abstract = "Combination of room temperature He ion implantation and swift heavy ion (SHI) irradiation in the multiple ion track overlapping regime has been used to study helium porosity in EP450 ODS steel containing crystalline or fully amorphous Y-Ti nano-oxides. It was found that helium bubbles formed during post-irradiation annealing have much better adhesion to amorphized precipitates in comparison with crystalline ones. However, this does not affect the overall porosity of the alloy which is defined by helium bubbles formed on structural defects inside the ferrite grain body and on grain boundaries.",
journal = "Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms",
title = "Helium in swift heavy ion irradiated ODS alloys",
volume = "460",
pages = "80-85",
doi = "10.1016/j.nimb.2019.04.007"
}

Sohatsky, A. S., Skuratov, V. A., Janse Van Vuuren, A., Van Tiep, N., O'Connell, J. H., Ibraeva, A., Zdorovets, M. V.,& Petrović, S. M.. (2019). Helium in swift heavy ion irradiated ODS alloys. in Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 460, 80-85.
https://doi.org/10.1016/j.nimb.2019.04.007

Sohatsky AS, Skuratov VA, Janse Van Vuuren A, Van Tiep N, O'Connell JH, Ibraeva A, Zdorovets MV, Petrović SM. Helium in swift heavy ion irradiated ODS alloys. in Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 2019;460:80-85.
doi:10.1016/j.nimb.2019.04.007 .

Sohatsky, Alexander S., Skuratov, Vladimir Alexeevich, Janse Van Vuuren, Arno, Van Tiep, Nguyen, O'Connell, Jacques H., Ibraeva, A., Zdorovets, Maxim V., Petrović, Srđan M., "Helium in swift heavy ion irradiated ODS alloys" in Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 460 (2019):80-85,
https://doi.org/10.1016/j.nimb.2019.04.007 . .

TY  - JOUR
AU  - Janse Van Vuuren, A.
AU  - Neethling, Johannes Henoch
AU  - Skuratov, Vladimir A.
AU  - Uglov, Vladimir Vasilevich
AU  - Petrović, Srđan M.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5990
AB  - Recent studies have shown that swift heavy ion irradiation may significantly modulate hydrogen and helium behaviour in some materials. This phenomenon is of considerable practical interest for ceramics in general and also for candidate materials for use as inert matrix fuel hosts. These materials will accumulate helium via (n, alpha) reactions and will also be subjected to irradiation by fission fragments. Cross-sectional transmission electron microscopy and scanning electron microscopy was used to study nanocrystalline ZrN irradiated with 30 keV He to fluences between 10(16) and 5 x 10(16) cm(-2), 167 MeV Xe to fluences between 5 x 10(13) and 10(14) cm(-2) and also 695 MeV Bi to a fluence of 1.5 x 10(13) cm(-2). He/Bi and He/Xe irradiated samples were annealed at temperatures between 600 and 1000 degrees C and were analysed using SEM, XTEM and selected area diffraction. The results indicated that post irradiation heat treatment induces exfoliation at a depth that corresponds to the end-of-range of 30 keV He ions. SEM and XTEM analysis of He/Xe irradiated samples revealed that electronic excitation effects, due to Xe ions, suppress helium blister formation and consequently the exfoliation processes. He/Bi samples however do not show the same effects. This suggests that nanocrystalline ZrN is prone to the formation of He blisters which may ultimately lead material failure. These effects may however be mitigated by electronic excitation effects from certain SHIs.
T2  - Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
T1  - The effect of He and swift heavy ions on nanocrystalline zirconium nitride
VL  - 326
SP  - 19
EP  - 22
DO  - 10.1016/j.nimb.2013.10.063
ER  - 

@article{
author = "Janse Van Vuuren, A. and Neethling, Johannes Henoch and Skuratov, Vladimir A. and Uglov, Vladimir Vasilevich and Petrović, Srđan M.",
year = "2014",
abstract = "Recent studies have shown that swift heavy ion irradiation may significantly modulate hydrogen and helium behaviour in some materials. This phenomenon is of considerable practical interest for ceramics in general and also for candidate materials for use as inert matrix fuel hosts. These materials will accumulate helium via (n, alpha) reactions and will also be subjected to irradiation by fission fragments. Cross-sectional transmission electron microscopy and scanning electron microscopy was used to study nanocrystalline ZrN irradiated with 30 keV He to fluences between 10(16) and 5 x 10(16) cm(-2), 167 MeV Xe to fluences between 5 x 10(13) and 10(14) cm(-2) and also 695 MeV Bi to a fluence of 1.5 x 10(13) cm(-2). He/Bi and He/Xe irradiated samples were annealed at temperatures between 600 and 1000 degrees C and were analysed using SEM, XTEM and selected area diffraction. The results indicated that post irradiation heat treatment induces exfoliation at a depth that corresponds to the end-of-range of 30 keV He ions. SEM and XTEM analysis of He/Xe irradiated samples revealed that electronic excitation effects, due to Xe ions, suppress helium blister formation and consequently the exfoliation processes. He/Bi samples however do not show the same effects. This suggests that nanocrystalline ZrN is prone to the formation of He blisters which may ultimately lead material failure. These effects may however be mitigated by electronic excitation effects from certain SHIs.",
journal = "Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms",
title = "The effect of He and swift heavy ions on nanocrystalline zirconium nitride",
volume = "326",
pages = "19-22",
doi = "10.1016/j.nimb.2013.10.063"
}

Janse Van Vuuren, A., Neethling, J. H., Skuratov, V. A., Uglov, V. V.,& Petrović, S. M.. (2014). The effect of He and swift heavy ions on nanocrystalline zirconium nitride. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 326, 19-22.
https://doi.org/10.1016/j.nimb.2013.10.063

Janse Van Vuuren A, Neethling JH, Skuratov VA, Uglov VV, Petrović SM. The effect of He and swift heavy ions on nanocrystalline zirconium nitride. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms. 2014;326:19-22.
doi:10.1016/j.nimb.2013.10.063 .

Janse Van Vuuren, A., Neethling, Johannes Henoch, Skuratov, Vladimir A., Uglov, Vladimir Vasilevich, Petrović, Srđan M., "The effect of He and swift heavy ions on nanocrystalline zirconium nitride" in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 326 (2014):19-22,
https://doi.org/10.1016/j.nimb.2013.10.063 . .