Porz, Lukas ; Klomp, Arne Jan ; Fang, Xufei ; Li, Ning ; Yildirim, Can ; Detlefs, Carsten ; Bruder, Enrico ; Höfling, Marion ; Rheinheimer, Wolfgang ; Patterson, Eric A. ; Gao, Peng ; Durst, Karsten ; Nakamura, Atsutomo ; Albe, Karsten ; Simons, Hugh ; Rödel, Jürgen (2023):
Dislocation-toughened ceramics. (Publisher's Version)
In: Materials Horizons, 8 (5), pp. 1528-1537. Royal Society of Chemistry, e-ISSN 2051-6355,
DOI: 10.26083/tuprints-00023191,
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Item Type: | Article |
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Origin: | Secondary publication service |
Status: | Publisher's Version |
Title: | Dislocation-toughened ceramics |
Language: | English |
Abstract: | Functional and structural ceramics have become irreplaceable in countless high-tech applications. However, their inherent brittleness tremendously limits the application range and, despite extensive research efforts, particularly short cracks are hard to combat. While local plasticity carried by mobile dislocations allows desirable toughness in metals, high bond strength is widely believed to hinder dislocation-based toughening of ceramics. Here, we demonstrate the possibility to induce and engineer a dislocation microstructure in ceramics that improves the crack tip toughness even though such toughening does not occur naturally after conventional processing. With modern microscopy and simulation techniques, we reveal key ingredients for successful engineering of dislocation-based toughness at ambient temperature. For many ceramics a dislocation-based plastic zone is not impossible due to some intrinsic property (e.g. bond strength) but limited by an engineerable quantity, i.e. the dislocation density. The impact of dislocation density is demonstrated in a surface near region and suggested to be transferrable to bulk ceramics. Unexpected potential in improving mechanical performance of ceramics could be realized with novel synthesis strategies. |
Journal or Publication Title: | Materials Horizons |
Volume of the journal: | 8 |
Issue Number: | 5 |
Place of Publication: | Darmstadt |
Publisher: | Royal Society of Chemistry |
Classification DDC: | 500 Naturwissenschaften und Mathematik > 530 Physik 500 Naturwissenschaften und Mathematik > 540 Chemie |
Divisions: | 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials |
Date Deposited: | 28 Feb 2023 10:13 |
Last Modified: | 25 May 2023 06:06 |
DOI: | 10.26083/tuprints-00023191 |
Corresponding Links: | |
URN: | urn:nbn:de:tuda-tuprints-231919 |
Additional Information: | Supplementary information: https://t1p.de/jur2y Supplementary movie 1: https://t1p.de/qb2r1 Supplementary movie 2: https://t1p.de/g8abc Supplementary movie 3: https://t1p.de/608mn Supplementary movie 4: https://t1p.de/s2eno Supplementary movie 5: https://t1p.de/5r441 |
URI: | https://tuprints.ulb.tu-darmstadt.de/id/eprint/23191 |
PPN: | 507928377 |
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