Synergy for Enhancing Strength and Toughness of Diamond through Polytypic Heterointerface
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27740%2F25%3A10257568" target="_blank" >RIV/61989100:27740/25:10257568 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/25:10497680
Result on the web
<a href="https://pubs.acs.org/doi/10.1021/acs.jpcc.5c00702" target="_blank" >https://pubs.acs.org/doi/10.1021/acs.jpcc.5c00702</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.jpcc.5c00702" target="_blank" >10.1021/acs.jpcc.5c00702</a>
Alternative languages
Result language
angličtina
Original language name
Synergy for Enhancing Strength and Toughness of Diamond through Polytypic Heterointerface
Original language description
Hierarchical diamond nanocomposites, incorporating diverse coherently interfaced diamond polytypes, exhibit remarkable fracture toughness while maintaining exceptional hardness. However, the underlying mechanisms governing the strengthening and toughening of these polytypic heterointerfaces (PHIs) remain elusive. In this study, we employed first-principles approaches to derive the ideal strength and Peierls stress, conducting a comprehensive investigation into the influence of various PHIs on the plasticity of nanostructured diamond. A ubiquitous strengthening effect was observed across all PHI types under uniform shear deformation, as the introduction of PHIs invariably aligned aportion of the crystal in the hard shear direction, yielding strength comparable to that of the nanotwinned diamond. Surprisingly, graphitization and bond collapsewere suppressed through a sequential transformation of stacking sequences, including an experimentally observed non-3C to 3C polytype transition. This phenomenon was attributed to the systematic bond realignment driven by continuous metallization confined to specific atomic layers. The heterointerface-mediated bonding reorganization effectively dissipated energy through phase transitions, thereby achieving supertoughness. Under localized deformation, all PHIs were found to enhance the barrier againstparallel slip of 1/2 ⟨110⟩ shuffle-set full dislocations and 1/6 ⟨112⟩ glide-set partial dislocations, leading to a pronounced strengthening effect. These findings not only deepen our fundamental understanding of the synergistic strengthening and toughening of diamond through PHIs but also offer valuable insights for the design of other superhard materials and engineering ceramics via coherent heterointerfaces.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
—
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
Journal of Physical Chemistry C
ISSN
1932-7447
e-ISSN
1932-7455
Volume of the periodical
129
Issue of the periodical within the volume
14
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
7116-7125
UT code for WoS article
001455902700001
EID of the result in the Scopus database
2-s2.0-105002636897