Version 1
: Received: 6 May 2024 / Approved: 7 May 2024 / Online: 7 May 2024 (10:22:49 CEST)
How to cite:
Kholodkova, A. A.; Kornyushin, M. V.; Khrustalev, A. N.; Arbanas, L. A.; Smirnov, A. V.; Ivakin, Y. D. Direct Cold Sintering of α-Al2O3 Ceramics in a Pure Water Medium. Preprints2024, 2024050366. https://doi.org/10.20944/preprints202405.0366.v1
Kholodkova, A. A.; Kornyushin, M. V.; Khrustalev, A. N.; Arbanas, L. A.; Smirnov, A. V.; Ivakin, Y. D. Direct Cold Sintering of α-Al2O3 Ceramics in a Pure Water Medium. Preprints 2024, 2024050366. https://doi.org/10.20944/preprints202405.0366.v1
Kholodkova, A. A.; Kornyushin, M. V.; Khrustalev, A. N.; Arbanas, L. A.; Smirnov, A. V.; Ivakin, Y. D. Direct Cold Sintering of α-Al2O3 Ceramics in a Pure Water Medium. Preprints2024, 2024050366. https://doi.org/10.20944/preprints202405.0366.v1
APA Style
Kholodkova, A. A., Kornyushin, M. V., Khrustalev, A. N., Arbanas, L. A., Smirnov, A. V., & Ivakin, Y. D. (2024). Direct Cold Sintering of α-Al<sub>2</sub>O<sub>3</sub> Ceramics in a Pure Water Medium. Preprints. https://doi.org/10.20944/preprints202405.0366.v1
Chicago/Turabian Style
Kholodkova, A. A., Andrey V. Smirnov and Yurii D. Ivakin. 2024 "Direct Cold Sintering of α-Al<sub>2</sub>O<sub>3</sub> Ceramics in a Pure Water Medium" Preprints. https://doi.org/10.20944/preprints202405.0366.v1
Abstract
Porous α-Al2O3 ceramics is a highly demanded material for multitude applications such as filters, substrates, biomedicine materials, etc. Despite the availability of the raw materials, a challenge of their technology is in a high energy budget caused by the sintering above 1500 °C. For a cold sintering processing (CSP) of ceramics, the lowering of α-Al2O3 sintering temperature is one of the most urgent challenges at the background of its rapid development. The current paper for the first time demonstrates the solution of the mentioned problem by the CSP of α-alumina ceramics in a presence of pure water as a transient liquid. The manufactured materials were examined by XRD analysis; the evolution of their microstructures during the CSP was revealed by SEM, and the porosity evaluated by the Archimedes method. The ceramics with an open porosity up to 36 % was produced at 380-450 °C, 220 MPa in 30 min. An increase in the pressure was found to impede α-Al2O3 formation from γ-AlOOH. The development of the microstructure was discussed within the frameworks of the dissolution-precipitation model and the homogenous nucleation. The results of the SEM study pointed to the coalescence of γ-AlOOH grains during the CSP.
Chemistry and Materials Science, Ceramics and Composites
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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