Water‐Mediated Surface Diffusion Mechanism Enables the Cold Sintering Process: A Combined Computational and Experimental Study
Abstract
Abstract The cold sintering process (CSP) densifies ceramics at much lower temperatures than conventional sintering processes. Several ceramics and composite systems have been successfully densified under cold sintering. For the grain growth kinetics of zinc oxide, reduced activation energies are shown, and yet the mechanism behind this growth is unknown. Herein, we investigate these mechanisms in more detail with experiments and ReaxFF molecular dynamics simulations. We investigated the recrystallization of zinc cations under various acidic conditions and found that their adsorption to the surface can be a rate‐limiting factor for cold sintering. Our studies show that surface hydroxylation in CSP does not inhibit crystallization; in contrast, by creating a surface complex, it creates an orders of magnitude acceleration in surface diffusion, and in turn, accelerates recrystallization.
- Authors:
-
- Materials Research Institute The Pennsylvania State University University Park PA 16802 USA
- Materials Research Institute The Pennsylvania State University University Park PA 16802 USA, State Key Laboratory for Mechanical Behaviour of Materials School of Materials Science and Engineering Xi'an Jiaotong University Xi'an China
- Materials Research Institute The Pennsylvania State University University Park PA 16802 USA, Department of Mechanical Engineering The Pennsylvania State University University Park PA 16802 USA
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1559059
- Grant/Contract Number:
- MUSE EFRC
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Angewandte Chemie (International Edition)
- Additional Journal Information:
- Journal Name: Angewandte Chemie (International Edition) Journal Volume: 58 Journal Issue: 36; Journal ID: ISSN 1433-7851
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- Germany
- Language:
- English
Citation Formats
Sengul, Mert Y., Guo, Jing, Randall, Clive A., and van Duin, Adri C. T. Water‐Mediated Surface Diffusion Mechanism Enables the Cold Sintering Process: A Combined Computational and Experimental Study. Germany: N. p., 2019.
Web. doi:10.1002/anie.201904738.
Sengul, Mert Y., Guo, Jing, Randall, Clive A., & van Duin, Adri C. T. Water‐Mediated Surface Diffusion Mechanism Enables the Cold Sintering Process: A Combined Computational and Experimental Study. Germany. https://doi.org/10.1002/anie.201904738
Sengul, Mert Y., Guo, Jing, Randall, Clive A., and van Duin, Adri C. T. Tue .
"Water‐Mediated Surface Diffusion Mechanism Enables the Cold Sintering Process: A Combined Computational and Experimental Study". Germany. https://doi.org/10.1002/anie.201904738.
@article{osti_1559059,
title = {Water‐Mediated Surface Diffusion Mechanism Enables the Cold Sintering Process: A Combined Computational and Experimental Study},
author = {Sengul, Mert Y. and Guo, Jing and Randall, Clive A. and van Duin, Adri C. T.},
abstractNote = {Abstract The cold sintering process (CSP) densifies ceramics at much lower temperatures than conventional sintering processes. Several ceramics and composite systems have been successfully densified under cold sintering. For the grain growth kinetics of zinc oxide, reduced activation energies are shown, and yet the mechanism behind this growth is unknown. Herein, we investigate these mechanisms in more detail with experiments and ReaxFF molecular dynamics simulations. We investigated the recrystallization of zinc cations under various acidic conditions and found that their adsorption to the surface can be a rate‐limiting factor for cold sintering. Our studies show that surface hydroxylation in CSP does not inhibit crystallization; in contrast, by creating a surface complex, it creates an orders of magnitude acceleration in surface diffusion, and in turn, accelerates recrystallization.},
doi = {10.1002/anie.201904738},
journal = {Angewandte Chemie (International Edition)},
number = 36,
volume = 58,
place = {Germany},
year = {Tue Jul 30 00:00:00 EDT 2019},
month = {Tue Jul 30 00:00:00 EDT 2019}
}
https://doi.org/10.1002/anie.201904738
Web of Science
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