Boron carbide dispersed epoxy composites for gamma radiation shielding applications

Jappes, J.T. Winowlin; Jappes, J. T. Winowlin; Nagaveena, S.; R, Krishna Sharma; M, Adam Khan

doi:10.1016/j.vacuum.2022.111474

Cited by 8 publications

(3 citation statements)

References 10 publications

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“…It is clear that the MFP increases with the increase in incoming gamma energy. The variation of MFP value for B 4 C is in agreement with the literature [33]. Similar to MAC and LAC, attenuation performance increases as the density of the clad material increases.…”

Section: According Tosupporting

confidence: 89%

Investigation of boron element and its use in nuclear reactors

Uzun

2023

Journal of Boron

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Within the scope of this study, the importance of boron element which has the largest reserve in Turkey and boron carbide, the most important material produced from boron, in nuclear technology has been emphasized. B4C is the basic material of control rods used to control the fission rate in nuclear reactors and is used in many nuclear reactors. The high neutron absorbing capacity of B4C material makes this material very useful. In order to examine B4C used in nuclear technology, mass attenuation coefficient (MAC) and lineer attenuation coefficient (LAC) values, which are two important radiation parameters, were examined through open access Photon Protection and Dosimetry (PSD) software which is at phy-x.net/PSD. The results obtained were compatible with the literature.

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Section: According Tosupporting

confidence: 89%

Investigation of boron element and its use in nuclear reactors

Uzun

2023

Journal of Boron

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“…This comparison showed that the predicted results aligned closely with literature data (TEC = 5.73-9.50 ×10 −6 K −1 , B = 221-246 GPa). This work presents the variation in elastic stiffness constants, average thermal expansion coefficient, and bulk modulus of single crystal B 4 C across a broad temperature range from 0 to 2000 K. Overall, this work advances our fundamental understanding of boron carbide at elevated temperatures and provides crucial information for optimizing its design across various extreme environment applications, including satellite and aerospace components [6,12], as well as radiation shielding [10,91].…”

Section: Discussionmentioning

confidence: 86%

Temperature-Dependent Elastic Properties of B4C from First-Principles Calculations and Phonon Modeling

Sheikhi,

Stroberg,

Hogan

2024

Ceramics

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Boron carbide plays a crucial role in various extreme environment applications, including thermal barrier coatings, aerospace applications, and neutron absorbers, because of its high thermal and chemical stability. In this study, the temperature-dependent elastic stiffness constants, thermal expansion coefficient, Helmholtz free energy, entropy, and heat capacity at a constant volume (Cv) of rhombohedral B4C have been predicted using a quasi-harmonic approach. A combination of volume-dependent first-principles calculations (density functional theory) and first-principles phonon calculations in the supercell framework has been performed. Good agreement between the elastic constants and structural parameters from static calculations is observed. The calculated thermodynamic properties from phonon calculations show trends that align with the literature. As the temperature rises, the predicted free energy follows a decreasing trend, while entropy and Cv follow increasing trends with temperature. Comparisons between the predicted room temperature thermal expansion coefficient (TEC) (7.54×10−6 K−1) and bulk modulus (228 GPa) from the quasi-harmonic approach and literature results from experiments and models are performed, revealing that the calculated TEC and bulk modulus fall within the established range from the limited set of data from the literature (TEC = 5.73–9.50 ×10−6 K−1, B = 221–246 GPa). Temperature-dependent Cijs are predicted, enabling stress analysis at elevated temperatures. Overall, the outcomes of this study can be used when performing mechanical and thermal stress analysis (e.g., space shielding applications) and optimizing the design of boron carbide materials for elevated temperature applications.

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“…It was suggested that Epoxy/YS composites could be used to shield low energy radiation. In another study, Vignesh et al produced Epoxy/Boron Carbide composites using molding and curing method for use in radiation protection applications [14]. Their results revealed that the radiation shielding performance of the composites improved with the amount of Boron Carbide (BC) particles at lower energies.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Cerium Oxide Nanoparticles on Gamma-Ray Shielding Capacity of Vinyl Ester Resin: Experimental, MCNP6 and WinXCom Results

Erdönmez

2024

Preprint

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The current study focused on investigating the gamma-ray shielding capacity of nano sized CeO2 (nCeO2) doped vinyl ester composites (VE/nCeO2) produced by the direct pouring method with different nCeO2 contents ranging from 2.5 to 20 wt%. X-ray Diffraction and Transmission Electron Microscopy were used to characterize the structural properties of nCeO2 particles. The gamma radiation shielding performance of the produced composites was investigated experimentally and theoretically within the scope of primary shielding coefficients like mass attenuation coefficient, half value layer, tenth value layer, mean free path, effective atomic number, and effective electron density. The experimental studies were obtained by NaI(Tl) scintillator detector for gamma-ray energies coming from Ba-133, Cs-137, and Co-60 radioactive point sources in the narrow beam geometry. The outcomes were compared with the theoretical calculations acquired by Monte Carlo N-Particle Transport version 6 code. The effective atomic number and effective electron density studies were additionally examined with WinXCom software. A good consistency between the experimental and theoretical outcomes was achieved. It was determined that among all composites, VE/20%nCeO2 composite having maximum nCeO2 content showed the best radiation shielding performance against all energy values. The nCeO2 additive was successful in enhancing the radiation attenuation performance of vinyl ester, and mass attenuation coefficients of investigated samples gradually changed from 0.15 to 0.79 cm2/g at 81 keV. The gamma-ray attenuation coefficients of the composites were compared with traditional shield materials and previously studied shielding materials and evaluated as promising lightweight, non-toxic alternatives for the low-energy gamma-ray shielding applications.

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Boron carbide dispersed epoxy composites for gamma radiation shielding applications

Cited by 8 publications

References 10 publications

Investigation of boron element and its use in nuclear reactors

Investigation of boron element and its use in nuclear reactors

Temperature-Dependent Elastic Properties of B4C from First-Principles Calculations and Phonon Modeling

The Effect of Cerium Oxide Nanoparticles on Gamma-Ray Shielding Capacity of Vinyl Ester Resin: Experimental, MCNP6 and WinXCom Results

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