Self-propagating high-temperature synthesis and characteristics of cermet matrices for isolation of wastes with long-lived radionuclides

Лаверов, Н. П.; Yudintsev, S. V.; Konovalov, E. E.; Никольский, М. С.; Mishevets, T. O.; Никонов, Б. С.; Omel’yanenko, B. I.

doi:10.1134/s1066362212050189

Cited by 7 publications

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“…Low diffusion rate of elements in solid-phase synthesis prevents attainment of the equilibrium, and preservations of relics of the initial charge leads to increased leaching of actinides from the matrix. Other methods for the synthesis of these materials are technically complicated (hot pressing [13]) or are in the step of laboratory trials (self-propagating high-temperature synthesis [14,15], spark plasma sintering [16,17]). …”

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Matrices for immobilization of the rare earth–actinide waste fraction, synthesized by cold crucible induction melting

et al. 2015

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The structure of eight samples containing simulated rare earth-actinide fraction of high-level waste was studied. Samples of weight from 0.2 to 6 kg were prepared by cold crucible induction melting followed by crystallization of the melt. The target phases (britholite, pyrochlore, zirconolite, rhombic and monoclinic rare earth titanates) prevail in all the matrices; glass, zirconolite, and rutile were detected as impurities, sometimes in significant amounts. These phases do not contain waste components (rutile) or are stable in solutions (zirconolite); therefore, their presence should not impair the properties of the matrix. The possibility of controlling the phase composition of the matrix by introducing zirconium or aluminum oxide into the charge was demonstrated.

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confidence: 99%