Development of a processing route for carbon allotrope-based TiC porous nanocomposites |
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Affiliation: | 1. Laboratory of Powder Technology, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland;2. European Organization for Nuclear Research (CERN), CH-1211 Genéve 23, Switzerland;3. Department of Materials and Ceramics Engineering, Universidade de Aveiro, CICECO, 3810-193 Aveiro, Portugal |
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Abstract: | Ti-foils are currently used as a spallation target material to produce radioisotopes for physics research at the ISOLDE facility at CERN. However, radioisotope production rates often decrease over time due to material degradation from high operation temperatures. Due to enhanced release rates, porous nanomaterials are being studied as spallation target materials for isotope production. TiC is a material with a very high melting point making it an interesting material to replace the Ti-foils. However, in its nanometric form it sinters readily at high temperatures. To overcome this, a new processing route was developed where TiC was co-milled with graphite, carbon black or multi-wall carbon nanotubes in order to hinder the sintering of TiC. The obtained nanocomposite particle sizes, density, specific surface area and porosity were characterized and compared using ANOVA. All carbon allotropes mixed with the TiC, were able to successfully stabilize the nanometric TiC, hindering its sintering up to 1500 °C for 10 h. |
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Keywords: | Nanocomposites Titanium carbide Spallation target Porous ceramics High temperature applications |
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