Search Results - "O'Connell, J H"

Ag transport in high temperature neutron irradiated 3C–SiC by O’Connell, J.H., Neethling, J.H.

“…The effect of high temperature neutron irradiation on the ability of a Pd–Ag mixture to penetrate 3C–SiC has been investigated. Previous work has revealed…”
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Recrystallization as the governing mechanism of ion track formation by Rymzhanov, R. A., Medvedev, N., O’Connell, J. H., Janse van Vuuren, A., Skuratov, V. A., Volkov, A. E.

“…Response of dielectric crystals: MgO, Al 2 O 3 and Y 3 Al 5 O 12 (YAG) to irradiation with 167 MeV Xe ions decelerating in the electronic stopping regime is…”
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Latent tracks and associated strain in Al2O3 irradiated with swift heavy ions by O’Connell, J.H., Rymzhanov, R.A., Skuratov, V.A., Volkov, A.E., Kirilkin, N.S.

“…The morphology of latent ion tracks induced by high energy heavy ions in Al2O3 was investigated using a combination of high resolution transmission electron…”
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cBN reinforced Y-α-SiAlON composites by Garrett, J.C., Sigalas, I., Herrmann, M., Olivier, E.J., O’Connell, J.H.

“…Dense α-Sialon–cBN composites were produced by FAST/SPS–sintering at 1575–1625°C. The hardness of the materials increases only up to 21GPa for materials with…”
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Palladium assisted silver transport in polycrystalline SiC by Neethling, J.H., O’Connell, J.H., Olivier, E.J.

“…The transport of silver in polycrystalline 3C-SiC and hexagonal 6H-SiC has been investigated by annealing the SiC samples in contact with a Pd–Ag compound at…”
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EM study of latent track morphology in TiO2 single crystals by O’Connell, J.H., Skuratov, V.A., Akilbekov, A., Zhumazhanova, A., Janse van Vuuren, A.

“…A TEM investigation was conducted into the morphology of 167MeV Xe (2×1010cm−2 to 1014cm−2) and 1GeV Bi ion (2×1010cm−2) induced latent tracks in single…”
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Electron microscopy profiling of ion implantation damage in diamond: Dependence on fluence and annealing by Nshingabigwi, E.K., Derry, T.E., Naidoo, S.R., Neethling, J.H., Olivier, E.J., O'Connell, J.H., Levitt, C.M.

“…The doping of diamond by ion implantation has been feasible for 25years, but with the proviso that low dose implants can be annealed whereas high dose implants…”
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Characterization of crystallite morphology for doped strontium fluoride nanophosphors by TEM and XRD by O'Connell, J.H., Lee, M.E., Yagoub, M.Y.A., Swart, H.C., Coetsee, E.

“…Crystallite morphology for Eu-doped and undoped SrF2 nanophosphors have been determined by X-ray diffraction (XRD) and transmission electron microscopy (TEM)…”
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Swift heavy ion induced phase transformations in partially stabilized ZrO2 by Ghyngazov, S.А., Boltueva, V.А., O'Connell, J.H., Vershinina, T.N., Kirilkin, N.S., Rymzhanov, R.A., Skuratov, V.A., Surzhikov, А.P.

“…The paper reports on the effect of irradiation by swift heavy Xe ions on partially stabilized zirconia ceramics. XRD analysis identified two tetragonal phases…”
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1.2 MeV/amu Xe ion induced damage recovery in SiC by O’Connell, J.H., Skuratov, V.A., Sohatsky, A.S., Neethling, J.H.

“…The microstructural changes of 4H-SiC samples dual irradiated with either low energy He (10keV) or Ti (220keV) and high energy (167MeV) Xe ions has been…”
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To a question of temperature driven gas swelling in helium doped ferritic alloys by Sohatsky, A.S., Nguyen, T.V., Skuratov, V.A., Bobrikov, I.A., O’Connell, J.H., Neethling, J., Zdorovets, M.

“…Samples of three different ferritic steels: conventional AISI410S and two experimental oxide dispersion-strengthened alloys Сr16ODS and EP450ODS, were…”
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Latent tracks of swift Bi ions in Si3N4 by van Vuuren, A Janse, Ibrayeva, A, Rymzhanov, R A, Zhalmagambetova, A, O'Connell, J H, Skuratov, V A, Uglov, V V, Zlotski, S V, Volkov, A E, Zdorovets, M

“…Parameters such as track diameter and microstruture of latent tracks in polycrystalline Si3N4 induced by 710 MeV Bi ions were studied using TEM and XRD…”
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3D insights into nickel converter matte phases: Direct observations via TEM and FIB SEM tomography by Thyse, E.L., Akdogan, G., Olivier, E.J., O’Connell, J.H., Neethling, J.H., Taskinen, P., Eksteen, J.J.

“…► Electron microscopy was applied successfully in the 3D analysis of converter matte. ► TEM illustrated in-plane phase distribution to an approximate depth of…”
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Absolute radiation tolerance of amorphous alumina coatings at room temperature by Zaborowska, A, Kurpaska, Ł, Clozel, M, Olivier, E. J, O'Connell, J. H, Vanazzi, M, Di Fonzo, F, Azarov, A, Jóźwik, I, Frelek-Kozak, M, Diduszko, R, Neethling, J. H, Jagielski, J

“…Ceramics International 47 (2021) 34740 34750 In this study structural and mechanical properties of a 1 um thick Al2O3 coating, deposited on 316L stainless…”
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Microstructural characterization of depth dependant crystal rotation in 593 MeV Au irradiated NiO at 45° incidence by Venter, D.A., O'Connell, J.H.

“…In this work we characterize the microstructure of a [0 0 1] oriented NiO single crystal exposed to 593 MeV Au to a fluence of 1.4 × 1014 ions/cm2 at 45° off…”
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Nanoindentation responses of Fe–Cr alloys from room temperature to 600 °C by Kurpaska, L., Clozel, M., O’Connell, J.H., Jóźwik, I., Wyszkowska, E., Huo, W.Y., Chrominski, W., Kalita, D., Nori, S.T., Fang, F., Jagielski, J., Neethling, J.H.

“…In this work, the evolution of nanomechanical properties was studied systematically as a function of temperature, chemical, and microstructural complexity of…”
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Exploring metastable phase formation: Swift heavy ion effects on partially stabilized zirconia by Kirilkin, N.S., Vershinina, T.N., O'Connell, J.H., Rymzhanov, R.A., Skuratov, V.A., Boltueva, V.А., Ghyngazov, S.А.

“…•3Y-TZP irradiated with 710 MeV Bi ions were studied by XRD, Raman, TEM techniques.•Swift heavy ion induced phase transformation t → t'' was observed.•t''…”
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SHI induced tetragonal tracks in natural zirconia by O'Connell, J.H., Lee, M.E., Skuratov, V.A., Rymzhanov, R.A.

“…We describe the observed tetragonal nature of individual ion tracks produced in natural monoclinic zirconia (ZrO2) as a result of 167 MeV Xe irradiation at…”
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Insights into different stages of formation of swift heavy ion tracks by Rymzhanov, R.A., Medvedev, N., O'Connell, J.H., Skuratov, V.A., Janse van Vuuren, A., Gorbunov, S.A., Volkov, A.E.

“…This review summarizes our results on effects of different stages of the formation kinetics of swift heavy ion (SHI) tracks on final structural changes. The…”
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Overlap of swift heavy ion tracks in Al2O3 by Rymzhanov, R.A., Medvedev, N., Volkov, A.E., O'Connell, J.H., Skuratov, V.A.

“…A structure in overlapping swift heavy ion track regions in Al2O3 is studied using numerical and experimental techniques. A swift heavy ion impact is modeled…”
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