Investigation of the Microstructure of Fine-Grained YPO4:Gd Ceramics with Xenotime Structure after Xe Irradiation


Mikhaylov D.A. Potanina E.A. Nokhrin A.V. Orlova A.I. Yunin P.A. Sakharov N.V. Boldin M.S. Belkin O.A. Skuratov V.A. Issatov A.T. Chuvil’deev V.N. Tabachkova N.Y.
June 2022MDPI

Ceramics
2022#5Issue 2237 - 252 pp.

This paper reports on the preparation of xenotime-structured ceramics using the Spark Plasma Sintering (SPS) method. Y0.95Gd0.05PO4 (YPO4:Gd) phosphates were obtained using the sol-gel method. The synthesized powders were nanodispersed and were agglomerated (the agglomerates sizes were 10–50 µm). The ceramics had a fine-grained microstructure and a high relative density (98.67 ± 0.18%). The total time of the SPS process was approximately 18 min. The sintered high-density YPO4:Gd ceramics with a xenotime structure were irradiated with132Xe+26 ions with 167 MeV of energy and fluences in the range of 1 × 1012–3 × 1013 cm−2. Complete amorphization was not achieved even at the maximum fluence. The calculated value of the critical fluence was (9.2 ± 0.1) × 1014 cm−2. According to the results of grazing incidence X-ray diffraction (GIXRD), the volume fraction of the amorphous structure increased from 20 to 70% with increasing fluence from 1 × 1012 up to 3 × 1013 cm−2. The intensity of the 200 YPO4:Gd XRD peak reached ~80% of the initial intensity after recovery annealing (700◦C, 18 h).

ceramics , GIXRD , metamict phase , microstructure , spark plasma sintering , xenotime

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Materials Science Department, Physical and Technical Research Institute, Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, 603022, Russian Federation
Laboratory of Diagnostics of Radiation Defects in Solid State Nanostructure, Institute for Physics of Microstructure, Russian Academy of Science, Nizhniy Novgorod, 603950, Russian Federation
G.N. Flerov Laboratory of Nuclear Reactions, Joint Institute of Nuclear Research, Dubna, 141980, Russian Federation
Institute of Nuclear Physics and Engineering, National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow, 115409, Russian Federation
Department of Nuclear Physics, Dubna State University, Dubna, 181982, Russian Federation
International Department of Nuclear Physics, New Materials and Technologies, The Faculty of Physics and Technology, Gumilov Eurasian National University, Nur-Sultan, 010000, Kazakhstan
Laboratory of Nuclear Processes, Nuclear Physics Department, The Institute of Nuclear Physics, Almaty, 050032, Kazakhstan
Center Collective Use “Materials Science and Metallurgy”, National University of Science and Technology “MISIS”, Moscow, 119991, Russian Federation
Laboratory “FIANIT”, Laser Materials and Technology Research Center, A.M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow, 119991, Russian Federation

Materials Science Department
Laboratory of Diagnostics of Radiation Defects in Solid State Nanostructure
G.N. Flerov Laboratory of Nuclear Reactions
Institute of Nuclear Physics and Engineering
Department of Nuclear Physics
International Department of Nuclear Physics
Laboratory of Nuclear Processes
Center Collective Use “Materials Science and Metallurgy”
Laboratory “FIANIT”

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