Nanoindentation testing of Si3N4 irradiated with swift heavy ions

Korneeva, Ekaterina; Ibrayeva, Anel; Vuuren, A. Janse van; Kurpaska, Ł.; Clozel, M.; Mulewska, K.; Kirilkin, N.S.; Скуратов, В.А.; Neethling, J.H.; Здоровец, М. В.

doi:10.1016/j.jnucmat.2021.153120

Cited by 15 publications

(2 citation statements)

References 35 publications

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“…In this case, the absence of the appearance of new diffraction reflections or the stratification of the observed reflections indicates the absence of processes of phase or polymorphic transformations in the composition of ceramics because of irradiation. It should be noted that in the case of AlN ceramics having a hexagonal type of crystal lattice, according to several works [11,31,32], irradiation with heavy ions does not cause the formation of structurally changed regions in the form of discontinuous or extended latent tracks, which are observed in silicon nitride. Several authors [33][34][35] attribute such differences in nitride ceramics to a higher binding energy in aluminum nitride, which prevents the formation of latent tracks.…”

Section: Resultsmentioning

confidence: 99%

Study of the Influence of the Irradiation Flux Density on the Formation of a Defect Structure in AlN in the Case of the Effect of Overlapping of the Heavy Ion Motion Trajectories in the Near-Surface Layer

et al. 2023

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The aim of this paper is to test the previously stated hypothesis and several experimental facts about the effect of the ion flux or ion beam current under irradiation with heavy ions on the radiation damage formation in the ceramic near-surface layer and their concentration. The hypothesis is that, when considering the possibilities of using ion irradiation (usually with heavy ions) for radiation damage simulation at a given depth, comparable to neutron irradiation, it is necessary to consider the rate factor for the set of atomic displacements and their accumulation. Using the methods of X-ray diffraction analysis, Raman and UV–Vis spectroscopy, alongside photoluminescence, the mechanisms of defect formation in the damaged layer were studied by varying the current of the Xe23+ ion beam with an energy of 230 MeV. As a result of the experimental data obtained, it was found that, with the ion beam current elevation upon the irradiation of nitride ceramics (AlN) with heavy Xe23+ ions, structural changes have a pronounced dependence on the damage accumulation rate. At the same time, the variation of the ion beam current affects the main mechanisms of defect formation in the near-surface layer. It has been found that at high values of flux ions, the dominant mechanism in damage to the surface layer is the mechanism of the formation of vacancy defects associated with the replacement of nitrogen atoms by oxygen atoms, as well as the formation of ON–VAl complexes.

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Section: Resultsmentioning

confidence: 99%

Study of the Influence of the Irradiation Flux Density on the Formation of a Defect Structure in AlN in the Case of the Effect of Overlapping of the Heavy Ion Motion Trajectories in the Near-Surface Layer

et al. 2023

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“…При этом сочетание двух компонент позволяет создавать композитные многофазные керамики, сочетающие в себе свойства обоих компонент. Стоит также отметить, что сочетание оксида алюминия, являющегося в большинстве случаев материалом -протектором для повышения устойчивости к механическим воздействиям, и нитрида кремния, являющимся одним из наиболее радиационно-стойких материалов, позволит создать инертную матрицу, обладающую высокой радиационной стойкостью и устойчивостью к внешним механическим воздействиям [13][14][15].…”

Section: Introductionunclassified

INVESTIGATION OF PHASE FORMATION PROCESSES IN COMPOSITE Al2O3-Si3N4 CERAMICS WITH VARIATIONS OF SINTERING TEMPERATURE

Borgekov

Kozlovskiy

2023

jour

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The purpose of this work is to establish regularities in the processes of phase formation in Al2O3-Si3N4 ceramics in the annealing temperature range from 800 to 1500 °C, as well as to determine the effect of the phase composition of ceramics on strength properties. Interest in this class of composite ceramics is due to the possibility of using them as materials for inert matrices of dispersed nuclear fuel. The evaluation of the phase composition as a result of thermal annealing of the samples was carried out using the method of X-ray phase analysis. In the course of the analysis, the following phase transformations were established: Si3N4/Al2O3 → Si3N4/Al2O3-M/Al2O3-R → Si3N4/Al2O3-R/Al2SiO5 → Al2SiO5/SiO2, according to which a change in the annealing temperature leads to polymorphic transformations of aluminum oxide with an increase in the annealing temperature, as well as the formation of a complex oxide phase of the Al2SiO5 type. At the same time, at an annealing temperature above 1400 °C, a transformation of the Si3N4 → SiO2 type is observed, associated with the processes of decomposition of silicon nitride and its transformation into silicon oxide upon interaction with air during annealing. It was found that the primary processes during annealing of ceramics are the processes of structural ordering of samples, without a significant change in the phase ratio.

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High-temperature dimensional stability and radiation behavior of high-entropy rare earth tungstate ceramics

Zhang,

Xue,

Zhang

et al. 2024

Ceramics International

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Nanoindentation testing of Si3N4 irradiated with swift heavy ions

Cited by 15 publications

References 35 publications

Study of the Influence of the Irradiation Flux Density on the Formation of a Defect Structure in AlN in the Case of the Effect of Overlapping of the Heavy Ion Motion Trajectories in the Near-Surface Layer

Study of the Influence of the Irradiation Flux Density on the Formation of a Defect Structure in AlN in the Case of the Effect of Overlapping of the Heavy Ion Motion Trajectories in the Near-Surface Layer

INVESTIGATION OF PHASE FORMATION PROCESSES IN COMPOSITE Al<sub>2</sub>O<sub>3</sub>-Si<sub>3</sub>N<sub>4</sub> CERAMICS WITH VARIATIONS OF SINTERING TEMPERATURE

High-temperature dimensional stability and radiation behavior of high-entropy rare earth tungstate ceramics

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