Function composites materials for shielding applications: Correlation between phase separation and attenuation properties

Тишкевич, Д.И.; Грабчиков, С. С.; Ластовский, С. Б.; Труханов, С.В.; Vasin, D.S.; Zubar, T.I.; Kozlovskiy, Artem L.; Zdorovets, Maxim V.; Sivakov, Vladimir; Muradyan, T. R.; Труханов, А.В.

doi:10.1016/j.jallcom.2018.08.209

Cited by 75 publications

(25 citation statements)

References 34 publications

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“…The structural damages of the host-guest system modify the local free volume characteristics and, in consequence, the amplitude of various non-linear effects. The interaction of the ions with the system can be modeled using the dedicated software GEANT4 [ 231 , 232 , 233 ].…”

Section: Discussionmentioning

confidence: 99%

Modeling of Nonlinear Optical Phenomena in Host-Guest Systems Using Bond Fluctuation Monte Carlo Model: A Review

et al. 2021

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We review the results of Monte Carlo studies of chosen nonlinear optical effects in host-guest systems, using methods based on the bond-fluctuation model (BFM) for a polymer matrix. In particular, we simulate the inscription of various types of diffraction gratings in degenerate two wave mixing (DTWM) experiments (surface relief gratings (SRG), gratings in polymers doped with azo-dye molecules and gratings in biopolymers), poling effects (electric field poling of dipolar molecules and all-optical poling) and photomechanical effect. All these processes are characterized in terms of parameters measured in experiments, such as diffraction efficiency, nonlinear susceptibilities, density profiles or loading parameters. Local free volume in the BFM matrix, characterized by probabilistic distributions and correlation functions, displays a complex mosaic-like structure of scale-free clusters, which are thought to be responsible for heterogeneous dynamics of nonlinear optical processes. The photoinduced dynamics of single azopolymer chains, studied in two and three dimensions, displays complex sub-diffusive, diffusive and super-diffusive dynamical regimes. A directly related mathematical model of SRG inscription, based on the continuous time random walk (CTRW) formalism, is formulated and studied. Theoretical part of the review is devoted to the justification of the a priori assumptions made in the BFM modeling of photoinduced motion of the azo-polymer chains.

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Section: Discussionmentioning

confidence: 99%

Modeling of Nonlinear Optical Phenomena in Host-Guest Systems Using Bond Fluctuation Monte Carlo Model: A Review

et al. 2021

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“…Gwyddion software package was used to analyze the grain size, and then statistic grain analysis was performed. The standard method was applied which is described in detail in [55]. The thickness of the deposited films was determined by the stepwise abrasion using a diamond probe with the nanoindenter Hysitron TI 750 Ubi [56].…”

Section: Methodsmentioning

confidence: 99%

Early-Stage Growth Mechanism and Synthesis Conditions-Dependent Morphology of Nanocrystalline Bi Films Electrodeposited from Perchlorate Electrolyte

et al. 2020

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Bi nanocrystalline films were formed from perchlorate electrolyte (PE) on Cu substrate via electrochemical deposition with different duration and current densities. The microstructural, morphological properties, and elemental composition were studied using scanning electron microscopy (SEM), atomic force microscopy (AFM), and energy-dispersive X-ray microanalysis (EDX). The optimal range of current densities for Bi electrodeposition in PE using polarization measurements was demonstrated. For the first time, it was shown and explained why, with a deposition duration of 1 s, co-deposition of Pb and Bi occurs. The correlation between synthesis conditions and chemical composition and microstructure for Bi films was discussed. The analysis of the microstructure evolution revealed the changing mechanism of the films’ growth from pillar-like (for Pb-rich phase) to layered granular form (for Bi) with deposition duration rising. This abnormal behavior is explained by the appearance of a strong Bi growth texture and coalescence effects. The investigations of porosity showed that Bi films have a closely-packed microstructure. The main stages and the growth mechanism of Bi films in the galvanostatic regime in PE with a deposition duration of 1–30 s are proposed.

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“…Prohorenko et al [5] modified composite materials for radiation protection using the powdered Aluminium particle of size 10-20 microns, 50-60 microns and Tungsten particles of sizes 30-40 microns, 200-210 microns in a polystyrene matrix, all samples produced to absorb the flux of gamma radiation fully in the energy range from 0 to 130 keV. Sabri and Mahdi [117] comparatively studied the shielding properties of lead oxide (PbO) composite using micro particle size with (5,10,15,20,30) wt.% and Nano particle size with (1,2,3,4,5) wt.% in gamma radiation. They found that the concentration (30) % of the micro shields and (5) % of Nano shields were of good attenuation, good mechanical specifications and more suitable to forming.…”

Section: Filler Particle Sizementioning

confidence: 99%

“…Tishkevich et al, [9] achieved optimal shielding effectiveness using Bismuth shields having 2 g/cm 2 reduced thickness and 156 attenuation coefficient under 1,6-1,8 meV electron radiation energy. Tishkevich et al, [10] correlated phase disengagement and attenuation characteristics of novel composite shields, authors found that the new leadfree shields provide absorbed dose reduction up to 6 times for outer space protons. Kadyrzhanov et al, [11] studied the shielding and radiation response of CuBi 2 O 4 composite at varied film thickness from 5 lm to 10 lm; the study showed that synthesized composite film shields possess a significant degree of stability to irradiation.…”

Section: Introductionmentioning

confidence: 99%

Trends in reinforced composite design for ionizing radiation shielding applications: a review

2021

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This review explored recent developments in reinforced composite design and applications for improved radiation shielding and high percentage attenuation. Radiation energy moves as a wave. Thus unguarded exposure to high-energy radiation is inimical to the human tissue and the overall health standing of individuals which may result in cancer, tumour, skin burns and cardiovascular diseases. Radiation energy is conventionally contained using lead-based shields. However, recent literature has faulted the continued use of lead citing drawbacks such as high toxicity, poisoning, lack of chemical stability, heaviness and hazardous after life handling. Consequently, the trending research evidence has shown mass deviation towards the use of reinforced polymer composite as an alternative to lead due to their light weight, low cost, high resilience, good mechanical tenacity and interesting electrical properties. The present review therefore summarizes the criteria for ionizing radiation shielding material design, mechanism of radiation energy shielding, beam penetration in composite shielding materials, theoretical shielding parameters in the design of radiation protective materials, scheme of reinforced composite material selection for shielding purposes and various control variables in the design of composite for ionizing radiation shielding. In addition, an attempt was made to highlight gaps in research and draw future scope for further studies. It is expected that this review will give some guidance to the future exploration in the design and application of reinforced composite with respect to ionizing radiation shielding processes.

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Function composites materials for shielding applications: Correlation between phase separation and attenuation properties

Cited by 75 publications

References 34 publications

Modeling of Nonlinear Optical Phenomena in Host-Guest Systems Using Bond Fluctuation Monte Carlo Model: A Review

Modeling of Nonlinear Optical Phenomena in Host-Guest Systems Using Bond Fluctuation Monte Carlo Model: A Review

Early-Stage Growth Mechanism and Synthesis Conditions-Dependent Morphology of Nanocrystalline Bi Films Electrodeposited from Perchlorate Electrolyte

Trends in reinforced composite design for ionizing radiation shielding applications: a review

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