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Consequences of the Ion Beam Irradiation on the Chemical Durability of Thorium Phosphate Diphosphate – Kinetics Study by C. Tamain; N. Dacheux; F. Garrido; A. Habert; N. Barré; A. Özgümüs; L. Thomé is a Materials Science article available to read on EtoBox.

What is Consequences of the Ion Beam Irradiation on the Chemical Durability of Thorium Phosphate Diphosphate – Kinetics Study about?

In the field of the long-term specific immobilization of actinides, thorium phosphate diphosphate (b-TPD), as potential candidate, must respond to several criteria. Among them, the material must present a good resistance to irradiation and keep its initial good properties such as resistance to aqueous alteration. In order to check this later point, sintered samples of b-TUPD solid solutions were pre-irradiated with ion beams with various conditions (fluence, stopping power) then submitted to leaching tests in different media (pH, temperature, complexing reagents, flow rate, . . .). The normalized dissolution rates depend significantly on the amorphous fraction (increase by a factor of 10-100 between unirradiated and fully amorphized materials). On the contrary, the pre-irradiation of the samples does not affect the kinetic parameters of the dissolution such as the partial order relative to the proton concentration (n = 0.37 ± 0.01 and n = 0.34 ± 0.01 for unirradiated and fully amorphized samples, respectively) and the activation energy of the reaction of dissolution (E app = 49 ± 4 kJ mol À1 and E app = 42 ± 4 kJ mol À1 for unirradiated and partly amorphized samples (f A < 1), resp

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Author

C. Tamain; N. Dacheux; F. Garrido; A. Habert; N. Barré; A. Özgümüs; L. Thomé

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-3115)

Published

2006

Language

EN

Field

Materials Science (Physical Sciences)