Aluminothermic reduction of CeO 2 : mechanism of an economical route to aluminum-cerium alloys.

Autor: Amon A; Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA 94550, USA. amon1@llnl.gov., Moore EE; Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA 94550, USA. amon1@llnl.gov., Henderson HB; Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA 94550, USA. amon1@llnl.gov., Shittu J; Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA 94550, USA. amon1@llnl.gov., Kunz M; Lawrence Berkeley National Laboratory, 1 Cyclotron Rd, Berkeley, CA 94720, USA., Kastamo S; Loukus Technologies Inc., 58390 Centennial Number 6 Road, Calumet, MI 49913, USA., Huotari N; Loukus Technologies Inc., 58390 Centennial Number 6 Road, Calumet, MI 49913, USA., Loukus A; Loukus Technologies Inc., 58390 Centennial Number 6 Road, Calumet, MI 49913, USA., Ott R; Ames National Laboratory, 2415 Pammel Dr, Ames, IA, 50011, USA., Weiss D; Loukus Technologies Inc., 58390 Centennial Number 6 Road, Calumet, MI 49913, USA., McCall SK; Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA 94550, USA. amon1@llnl.gov.
Jazyk: angličtina
Zdroj: Materials horizons [Mater Horiz] 2024 May 20; Vol. 11 (10), pp. 2382-2387. Date of Electronic Publication: 2024 May 20.
DOI: 10.1039/d4mh00087k
Abstrakt: Cerium oxide is a low-value byproduct of rare-earth mining yet constitutes the largest fraction of the rare earth elements. The reduction of cerium oxide by liquid aluminum is proposed as an energy- and cost-efficient route to produce high-strength Al-Ce alloys. This work investigated the mechanism of a multi-step reduction reaction to facilitate the industrial adaptation of the process. Differential scanning calorimetry in combination with time-resolved synchrotron diffraction data uncovered the rate-limiting reaction step as the origin of the reported temperature dependence of reduction efficiency. This is the first in situ study of a metallothermic reaction mechanism and will serve as guidance for cost- and energy efficient industrial process control.
Databáze: MEDLINE
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