Porous TaCx ISOL target materials from mould-casted Ta4AlC3

Griseri M, Biggemann J, Ramos JP, Li G, Dams O, Popescu L, Vleugels J, Fey T, Lambrinou K (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Journal of the European Ceramic Society Elsevier

DOI: 10.1016/j.jeurceramsoc.2021.02.022

Abstract

Mould casting and sacrificial templating techniques, common in bioceramic technology, were employed to process porous TaCx ultra-high temperature ceramics intended as novel target materials for isotope separation on-line (ISOL) facilities, aiming primarily at the production of medical radioisotopes. A feedstock of Ta4AlC3 MAX phase powder, polyamide spheres and wax was used to obtain different porous TaCx grades with bimodal pore size distributions. The ‘green’ bodies underwent de-binding and vacuum annealing to decompose the MAX phase, whereas a reference material was also produced from commercial TaC powders. The thermal stability of the porous TaCx ceramics was assessed at ISOL-relevant conditions by heating in high vacuum up to 2200 °C. The MAX phase-derived TaCx porous ceramics evolved from biphasic TaCx/α-Ta2C to single-phase TaCx at higher temperatures, due to carbon incorporation. The porous TaCx microstructure was stable at 2200 °C with a specific surface area stabilizing at ∼0.25 m2/g and thermal conductivity of 1−4 W/m K.

Authors with CRIS profile

Jonas Biggemann Lehrstuhl für Glas und Keramik (WW3) Tobias Fey Lehrstuhl für Glas und Keramik (WW3)

Involved external institutions

Belgian Nuclear Research Centre (SCK•CEN) / Studiecentrum voor Kernenergie / Centre d'Étude de l'énergie Nucléaire BE Belgium (BE) Katholieke Universiteit Leuven (KUL) / Catholic University of Leuven BE Belgium (BE)

How to cite

APA:

Griseri, M., Biggemann, J., Ramos, J.P., Li, G., Dams, O., Popescu, L.,... Lambrinou, K. (2021). Porous TaCx ISOL target materials from mould-casted Ta4AlC3. Journal of the European Ceramic Society. https://doi.org/10.1016/j.jeurceramsoc.2021.02.022

MLA:

Griseri, Matteo, et al. "Porous TaCx ISOL target materials from mould-casted Ta4AlC3." Journal of the European Ceramic Society (2021).

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