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Large mechanical pr...
Large mechanical properties enhancement in ceramics through vacancy-mediated unit cell disturbance
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- Chen, Zhuo (författare)
- Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Leoben, Austria
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- Huang, Yong (författare)
- Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Leoben, Austria
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- Koutná, Nikola, 1991- (författare)
- Linköpings universitet,Teoretisk Fysik,Tekniska fakulteten,Institute of Materials Science and Technology, TU Wien, A-1060, Vienna, Austria
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- Gao, Zecui (författare)
- Institute of Materials Science and Technology, TU Wien, Vienna, Austria
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- Sangiovanni, Davide Giuseppe, 1979- (författare)
- Linköpings universitet,Teoretisk Fysik,Tekniska fakulteten
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- Fellner, Simon (författare)
- Institute of Materials Science and Technology, TU Wien, Vienna, Austria
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- Haberfehlner, Georg (författare)
- Institute of Electron Microscopy and Nanoanalysis, Graz University of Technology, Graz, Austria
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- Jin, Shengli (författare)
- Chair of Ceramics, Montanuniversität Leoben, Leoben, Austria
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- Mayrhofer, Paul H. (författare)
- Institute of Materials Science and Technology, TU Wien, Vienna, Austria
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- Kothleitner, Gerald (författare)
- Institute of Electron Microscopy and Nanoanalysis, Graz University of Technology, Graz, Austria; Graz Centre for Electron Microscopy, Graz, Austria
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- Zhang, Zaoli (författare)
- Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Leoben, Austria; Department of Materials Science, Montanuniversität Leoben, Leoben, Austria
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(creator_code:org_t)
- Nature Publishing Group, 2023
- 2023
- Engelska.
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Ingår i: Nature Communications. - : Nature Publishing Group. - 2041-1723. ; 14:1
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Tailoring vacancies is a feasible way to improve the mechanical properties of ceramics. However, high concentrations of vacancies usually compromise the strength (or hardness). We show that a high elasticity and flexural strength could be achieved simultaneously using a nitride superlattice architecture with disordered anion vacancies up to 50%. Enhanced mechanical properties primarily result from a distinctive deformation mechanism in superlattice ceramics, i.e., unit-cell disturbances. Such a disturbance substantially relieves local high-stress concentration, thus enhancing deformability. No dislocation activity involved also rationalizes its high strength. The work renders a unique understanding of the deformation and strengthening/toughening mechanism in nitride ceramics.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
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Chen, Zhuo
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Huang, Yong
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Koutná, Nikola, ...
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Gao, Zecui
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Sangiovanni, Dav ...
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Fellner, Simon
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Haberfehlner, Ge ...
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Jin, Shengli
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Mayrhofer, Paul ...
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Kothleitner, Ger ...
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Zhang, Zaoli
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