中文版 | English
Title

Dislocation toughening in single-crystal KNbO3

Author
Corresponding AuthorPreuss, 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 TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/523902
DepartmentDepartment 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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