Designing ultrahard nanostructured diamond through internal defects and interface engineering at different length scales

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27740%2F20%3A10245559" target="_blank" >RIV/61989100:27740/20:10245559 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0008622320308010" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0008622320308010</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.carbon.2020.08.036" target="_blank" >10.1016/j.carbon.2020.08.036</a>

Result language

angličtina

Original language name

Designing ultrahard nanostructured diamond through internal defects and interface engineering at different length scales

Original language description

Nanocrystalline diamonds (NCDs) are promising structural materials due to their extraordinary mechanical properties such as ultrahigh hardness and excellent toughness, however, a rational design rule in plasticity and fracture through controlling nanostructures at different length scales is far from being explored. By means of atomic simulations and plasticity theory in the present paper, we comprehensively explored the plastic deformation behaviors of a series of well-defined NCDs by varying amorphous interfacial layers (AILs) and internal defects, e.g., twin boundary, stacking fault, π-bonded interface, and fivefold twin. It was observed that the effect of internal defects on the mechanical response of NCD can be attributed to the competition between dislocation blocking process and interface sliding process. The introduction of AIL at grain boundary (GB) is found to provide an effective solution to decrease both dislocation nucleation and penetration at GBs. These findings provide not only a mechanistic insight into the unique strengthening and toughening in various NCDs, but a rational guidance in designing novel superhard carbon materials with superior performance by engineering internal defects and GB structures at different length scales. (C) 2020 Elsevier Ltd

Czech name

—

Czech description

—

Type

J_imp - 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.)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Carbon

ISSN

0008-6223

e-ISSN

—

Volume of the periodical

170

Issue of the periodical within the volume

December

Country of publishing house

GB - UNITED KINGDOM

Number of pages

9

Pages from-to

394-402

UT code for WoS article

000579779800039

EID of the result in the Scopus database

2-s2.0-85090018257