Ding, Wenjin and Shi, Yuan and Braun, Markus and Kessel, Fiona and Friess, Martin and Bonk, Alexander and Bauer, Thomas (2021) Compatibility of 3D-Printed Oxide Ceramics with Molten Chloride Salts for High-Temperature Thermal Energy Storage in Next-Generation CSP Plants. Energies, 14 (2599). Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/en14092599. ISSN 1996-1073.
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Official URL: https://www.mdpi.com/1996-1073/14/9/2599
Abstract
Oxide ceramics could be attractive high-temperature construction materials for critical structural parts in high-temperature molten salt thermal energy storage systems due to their excellent corro-sion resistance and good mechanical properties. The 3D-printing technology allows the produc-tion of ceramic components with highly complex geometries, and therefore extends their applica-tions. In this work, 3D-printed ZrO2 and Al2O3 ceramics were immersed in molten MgCl2/KCl/NaCl under argon or exposed in argon without molten chlorides at 700 °C for 600 h. Their material properties and microstructure were investigated through three-point-bend (3PB) testing and material analysis with SEM-EDX and XRD. The results show that the 3D-printed Al2O3 maintained its mechanical property after exposure in the strongly corrosive molten chloride salt. The 3D-printed ZrO2 had an enhanced 3PB strength after molten salt exposure, whereas no change was observed after exposure in argon at 700 °C. The material analysis shows that some of the ZrO2 on the sample surface changed its crystal structure and shape (T→M phase transfor-mation) after molten salt exposure, which could be the reason for the enhanced 3PB strength. The thermodynamic calculation shows that the T→M transformation could be caused by the reaction of the Y2O3-stabilized ZrO2 with MgCl2 (mainly Y2O3 and ZrO2 with gaseous MgCl2). In conclu-sion, the 3D-printed ZrO2 and Al2O3 ceramics have excellent compatibility with corrosive molten chlorides at high temperatures and thus show a sound application potential as construction mate-rials for molten chlorides.
Item URL in elib: | https://elib.dlr.de/142257/ | ||||||||||||||||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||||||||||||||||
Title: | Compatibility of 3D-Printed Oxide Ceramics with Molten Chloride Salts for High-Temperature Thermal Energy Storage in Next-Generation CSP Plants | ||||||||||||||||||||||||||||||||
Authors: |
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Date: | 1 May 2021 | ||||||||||||||||||||||||||||||||
Journal or Publication Title: | Energies | ||||||||||||||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||||||||||||||
Open Access: | Yes | ||||||||||||||||||||||||||||||||
Gold Open Access: | Yes | ||||||||||||||||||||||||||||||||
In SCOPUS: | Yes | ||||||||||||||||||||||||||||||||
In ISI Web of Science: | Yes | ||||||||||||||||||||||||||||||||
Volume: | 14 | ||||||||||||||||||||||||||||||||
DOI: | 10.3390/en14092599 | ||||||||||||||||||||||||||||||||
Publisher: | Multidisciplinary Digital Publishing Institute (MDPI) | ||||||||||||||||||||||||||||||||
ISSN: | 1996-1073 | ||||||||||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||||||||||
Keywords: | concentrated solar power (CSP); 3D-printed ZrO2 and Al2O3 ceramics; three-point-bend strength (3PB strength); corrosion resistance; molten salt | ||||||||||||||||||||||||||||||||
HGF - Research field: | Energy | ||||||||||||||||||||||||||||||||
HGF - Program: | Materials and Technologies for the Energy Transition | ||||||||||||||||||||||||||||||||
HGF - Program Themes: | High-Temperature Thermal Technologies | ||||||||||||||||||||||||||||||||
DLR - Research area: | Energy | ||||||||||||||||||||||||||||||||
DLR - Program: | E VS - Combustion Systems | ||||||||||||||||||||||||||||||||
DLR - Research theme (Project): | E - Materials for High-Temperature Thermal Technologies, E - Advanced Heat Transfer Media, E - Thermochemical Processes | ||||||||||||||||||||||||||||||||
Location: | Stuttgart | ||||||||||||||||||||||||||||||||
Institutes and Institutions: | Institute of Engineering Thermodynamics > Thermal Process Technology Institute of Structures and Design > Ceramic Composite Structures | ||||||||||||||||||||||||||||||||
Deposited By: | Ding, Wenjin | ||||||||||||||||||||||||||||||||
Deposited On: | 12 May 2021 09:42 | ||||||||||||||||||||||||||||||||
Last Modified: | 28 Mar 2023 23:59 |
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