Heavy alloy based on tungsten and bismuth: fabrication, crystal structure, morphology, and shielding efficiency against gamma-radiation
Tishkevich D.I. Rotkovich A.A. German S.A. Zhaludkevich A.L. Vershinina T.N. Bondaruk A.A. Razanau I.U. Dong M. Sayyed M.I. Leonchik S.V. Zubar T. Silibin M.V. Trukhanov S.V. Trukhanov A.V.
15 August 2023Royal Society of Chemistry
RSC Advances
2023#13Issue 3524491 - 24498 pp.
W-Bi2O3 composites were fabricated using the hot isostatic pressing technique for the first time. The duration of the samples sintering was 3 minutes under conditions of high pressure and temperature. The study of microstructural features and chemical composition of sintered samples was carried out using scanning electron microscopy and energy-dispersive X-ray spectroscopy, respectively. The effect of temperature on the quality of the obtained W-Bi2O3 composites is determined. The densest samples were obtained at a pressure of 5 GPa and temperatures of 25 °C and 500 °C, the densities of which were 18.10 and 17.85 g cm−3, respectively. It is presented that high temperature exposure during sintering adversely affects both the composite density and microstructure due to the redox reaction accompanied by the reduction of Bi and the oxidation of W. The results of the W-Bi2O3 structure study using X-ray diffraction analysis showed that all samples included the main bulk-centered cubic W phase. The presence of the WO2 phase is noted only when the sintering temperature is increased up to 850 °C, which is confirmed by the appearance of diffraction peaks that correspond to 111 and 22−2 crystallographic planes. The shielding efficiency of the W-Bi2O3 composite against gamma radiation using the Phy-X/PSD software was evaluated. A Co60 isotope with an energy of 0.826-2.506 MeV was used as a source of gamma radiation. The calculation results were compared with those for Pb and Bi. Key shielding parameters such as the linear attenuation coefficient, half-value layer, tenth-value layer, mean free path, and effective atomic number are determined. The calculation results revealed that the W-Bi2O3 composite surpasses Pb and Bi in its shielding properties, which makes it promising for use as a prospective material for radiation shielding applications.
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SSPA Scientific-Practical Materials Research Centre of NAS of Belarus, Minsk, 220072, Belarus
Belarusian National Technical University, Minsk, 220013, Belarus
Joint Institute for Nuclear Research, Dubna, 141980, Russian Federation
University Dubna, Dubna, 141982, Russian Federation
Department of Resources and Environment, School of Metallurgy, Northeastern University, Liaoning Province, Shenyang, 110819, China
Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong
Department of Physics, Faculty of Science, Isra University, Amman, 1162, Jordan
Department of Nuclear Medicine Research, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman bin Faisal University, Dammam, 31441, Saudi Arabia
I.M. Sechenov First Moscow State Medical University, Moscow, 119435, Russian Federation
Smart Sensors Laboratory, Department of Electronic Materials Technology, National University of Science and Technology MISiS, Moscow, 119049, Russian Federation
L.N. Gumilyov Eurasian National University, Astana, 010000, Kazakhstan
SSPA Scientific-Practical Materials Research Centre of NAS of Belarus
Belarusian National Technical University
Joint Institute for Nuclear Research
University Dubna
Department of Resources and Environment
Department of Civil and Environmental Engineering
Department of Physics
Department of Nuclear Medicine Research
I.M. Sechenov First Moscow State Medical University
Smart Sensors Laboratory
L.N. Gumilyov Eurasian National University
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