Radiation Resistance and Hydrolytic Stability of Y0.95Gd0.05PO4-Based Ceramics with the Xenotime Structure

— The Y 0.95 Gd 0.05 PO 4 phosphate with the xenotime structure has been synthesized in powder form and as ceramics. Ceramics with a relative density of ~99% have been produced by spark plasma sintering. The sintering temperature was 1140°C and the sintering time was ~18 min, without isothermal hold...

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Bibliographic Details
Published in:Inorganic materials 2021-07, Vol.57 (7), p.760-765
Main Authors: Mikhailov, D. A., Potanina, E. A., Orlova, A. I., Nokhrin, A. V., Boldin, M. S., Belkin, O. A., Sakharov, N. V., Skuratov, V. A., Kirilkin, N. S., Chuvil’deev, V. N.
Format: Article
Language:English
Subjects:
Amorphization
Ceramic powders
Ceramics
Chemistry
Chemistry and Materials Science
Fluence
Gadolinium
Heat treatment
High temperature
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Leaching
Materials Science
Mathematical analysis
Plasma sintering
Radiation
Radiation tolerance
Sintering (powder metallurgy)
Spark plasma sintering
Xenotime
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Summary:— The Y 0.95 Gd 0.05 PO 4 phosphate with the xenotime structure has been synthesized in powder form and as ceramics. Ceramics with a relative density of ~99% have been produced by spark plasma sintering. The sintering temperature was 1140°C and the sintering time was ~18 min, without isothermal holding. We have assessed the radiation resistance of the ceramics under irradiation with 132 Xe 26+ ions and investigated the restoration of the obtained metamict phase to a crystalline one via high-temperature heat treatment. No complete amorphization of the samples has been reached at the fluences used in this study. The calculated critical fluence is (9.2 ± 0.1) × 10 14 cm –2 , and the calculated latent track radius is ~2.8 nm. Hydrolytic tests have shown that the phosphate under study is stable in water under dynamic conditions. The observed Y and Gd leaching rates were R i = 1.68 × 10 –6 and 1.5 × 10 –7 g/(cm 2 day), respectively.
ISSN:0020-1685
1608-3172
DOI:10.1134/S0020168521070128