Multi-scale interface design of strong and damage resistant hierarchical nanostructured materials
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F20%3APU140409" target="_blank" >RIV/00216305:26620/20:PU140409 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.matdes.2020.109169" target="_blank" >https://doi.org/10.1016/j.matdes.2020.109169</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.matdes.2020.109169" target="_blank" >10.1016/j.matdes.2020.109169</a>
Alternative languages
Result language
angličtina
Original language name
Multi-scale interface design of strong and damage resistant hierarchical nanostructured materials
Original language description
Synthesis of damage resistant nanostructured materials with high strength and fracture toughness is a challenging task. In this work, multi-scale interfaces were implemented into a hierarchical TiN/SiOx microstructure to mimic stepwise crack growth behaviour of the hard and damage resistant bivalve mollusc Saxidomus purpuratus shell. In situ micromechanical testing in scanning and transmission electron microscopes revealed multi-scale crack deflection events at grain boundaries of individual alternately-tilted TiN crystallites, at kinks of their repeatedly tilted columnar grains as well as crack interaction with perpendicular interfaces of elastic amorphous SiOx layers. These events induced an increase in the crack surface area, reduction of the crack driving force and dissipation of local stress and energy at the crack tip with subsequent crack slow-down or arrest, resulting in fracture toughness exceeding by similar to 200% the toughness of monolithic TiN nanoceramics. By this perspective biomimetic microstructural design, catastrophic failure of brittle ceramics may be turned into a predictable and controllable process increasing reliability of strong materials in various challenging safety-critical engineering applications. It also shows potential paths for the development of strong and simultaneously tough materials with high mechanical and thermal stability. (c) 2020 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http:// creativecommons.org/licenses/by-nc-nd/4.0/).
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
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Continuities
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Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
MATERIALS & DESIGN
ISSN
0264-1275
e-ISSN
1873-4197
Volume of the periodical
196
Issue of the periodical within the volume
1
Country of publishing house
GB - UNITED KINGDOM
Number of pages
11
Pages from-to
„109169-1“-„109169-11“
UT code for WoS article
000588264900002
EID of the result in the Scopus database
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