| Title | Dislocation toughening in single-crystal KNbO3 |
| Author | |
| Corresponding Author | Preuss, Oliver; Fang, Xufei |
| Publication Years | 2023-03-01
|
| DOI | |
| Source Title | |
| ISSN | 0002-7820
|
| EISSN | 1551-2916
|
| Abstract | The growing research interest in dislocation-tuned functionality in ceramics is evident, with the most recent proofs-of-concept for enhanced ferroelectric properties, electrical conductivity, and superconductivity via dislocations. In this work, we focus on dislocation-tuned mechanical properties and demonstrate that, by engineering high dislocation densities (up to 10(14) m(-2)) into KNbO3 at room temperature, the fracture toughness can be improved by a factor of 2.8. The microstructures, including dislocations and domain walls, are examined by optical microscopy, electron channeling contrast imaging, piezo-response force microscopy, and transmission electron microscopy methods to shed light on the toughening mechanisms. In addition, high-temperature (above the Curie temperature of KNbO3) indentation tests were performed to exclude the influence of ferroelastic toughening, such that the origin of the toughening effect is pinpointed to be dislocations. |
| Keywords | |
| URL | [Source Record] |
| Indexed By | |
| Language | English
|
| SUSTech Authorship | Others
|
| Funding Project | DFG[414179371]
|
| WOS Research Area | Materials Science
|
| WOS Subject | Materials Science, Ceramics
|
| WOS Accession No | WOS:000950437000001
|
| Publisher | |
| ESI Research Field | MATERIALS SCIENCE
|
| Data Source | Web of Science
|
| Citation statistics |
Cited Times [WOS]:0
|
| Document Type | Journal Article |
| Identifier | http://kc.sustech.edu.cn/handle/2SGJ60CL/523902 |
| Department | Department of Mechanical and Energy Engineering |
| Affiliation | 1.Tech Univ Darmstadt, Dept Mat & Earth Sci, Div Nonmet Inorgan Mat, Darmstadt, Germany 2.Tech Univ Darmstadt, Dept Mat & Earth Sci, Div Phys Met, Darmstadt, Germany 3.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen, Peoples R China |
| Recommended Citation GB/T 7714 |
Preuss, Oliver,Bruder, Enrico,Lu, Wenjun,et al. Dislocation toughening in single-crystal KNbO3[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY,2023.
|
| APA |
Preuss, Oliver.,Bruder, Enrico.,Lu, Wenjun.,Zhuo, Fangping.,Minnert, Christian.,...&Fang, Xufei.(2023).Dislocation toughening in single-crystal KNbO3.JOURNAL OF THE AMERICAN CERAMIC SOCIETY.
|
| MLA |
Preuss, Oliver,et al."Dislocation toughening in single-crystal KNbO3".JOURNAL OF THE AMERICAN CERAMIC SOCIETY (2023).
|
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