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Elaboration et caractérisation d'objets massifs nanocomposites base carbure de silicium comme absorbeurs solaires

Abstract : A common industrial challenge to improve the efficiency of the solar-to-electricity conversion for concentrating solar power (CSP) is to operate at high temperatures (around 1000°C). Research and development efforts on over recent years have therefore focused on the materials that compose the solar absorber which plays the key role in the overall CSP system performance. Silicon carbide (SiC) exhibits a chemical inertness, a high temperature oxidation resistance and a robustness compatible with the operating conditions of further CSP systems. In this work, Polymer derived nanocomposites ceramics TiCxN(1-x)/Si(B)C et TiCxN(1-x)/SiC(N) (with 0<1) have been developed to be use as solar absorber. A complete characterization from the polymer to the final material is done using techniques as Solid-state NMR, FTIR, TGA, XRD, Raman SEM and TEM. The bulk shaping process was also investigated. Hot pressing at the polymeric state and Flash Sintering on amorphous PDCs powders has been done.
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Submitted on : Wednesday, February 19, 2020 - 6:26:08 PM
Last modification on : Thursday, February 20, 2020 - 1:37:14 AM

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Maxime Balestrat. Elaboration et caractérisation d'objets massifs nanocomposites base carbure de silicium comme absorbeurs solaires. Matériaux. Université de Limoges, 2019. Français. ⟨NNT : 2019LIMO0102⟩. ⟨tel-02484987⟩

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