A dislocation perspective on heterointerfacial strengthening in nanostructured diamond and cubic boron nitride composites
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27740%2F25%3A10257389" target="_blank" >RIV/61989100:27740/25:10257389 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/25:10495578
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0008622325000958?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0008622325000958?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.carbon.2025.120079" target="_blank" >10.1016/j.carbon.2025.120079</a>
Alternative languages
Result language
angličtina
Original language name
A dislocation perspective on heterointerfacial strengthening in nanostructured diamond and cubic boron nitride composites
Original language description
The nanometer-scale diamond/cBN (C/BN) heterointerface is believed to significantly enhance the mechanical properties of diamond-cBN nanocomposites, however, the underlying mechanisms remain largely unexplored and poorly understood. In this study, we conduct a comprehensive investigation of the dislocation slip resistance at perfect C/BN heterointerfaces and their corresponding nanotwinned and stacking-faulted structures, utilizing the ab initio-informed Peierls-Nabarro model. Our findings show that the nanotwinned defects at the heterointerface, characterized by negative formation energy, are more thermodynamically stable than those in the cBN and diamond bulk. Stacking faults tend to favor the cBN side over the diamond side at the heterointerface, which is consistent with experimental observations. The perfect C/BN heterointerface exhibits notably lower slip resistance to parallel dislocation than bulk diamond and cBN due to shear-induced Friedel oscillation. Conversely, a much higher dislocation slip resistance is observed at the nanotwinned and stacking-faulted C/BN heterointerfaces than that of bulk cBN, suggesting that the mirror symmetry presented across the nanotwinned and stacking-faulted heterointerfaces offers an effective strategy for strengthening. These insights not only offer a novel perspective on the ubiquitous heterointerfacial strengthening in diamond-cBN nanocomposites, but also underscore the pivotal role of atomic-scale interfaces in designing superhard nanostructures.
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
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
<a href="/en/project/EH22_008%2F0004572" target="_blank" >EH22_008/0004572: Quantum materials for applications in sustainable technologies</a><br>
Continuities
—
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Carbon
ISSN
0008-6223
e-ISSN
1873-3891
Volume of the periodical
235
Issue of the periodical within the volume
March
Country of publishing house
GB - UNITED KINGDOM
Number of pages
9
Pages from-to
120079
UT code for WoS article
001424129200001
EID of the result in the Scopus database
2-s2.0-85216846498