Influence of hexagonal boron nitride nanosheets on phase transformation, microstructure evolution and mechanical properties of Si3N4 ceramics
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F21%3A00542944" target="_blank" >RIV/68081723:_____/21:00542944 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0955221921000972?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0955221921000972?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jeurceramsoc.2021.01.057" target="_blank" >10.1016/j.jeurceramsoc.2021.01.057</a>
Alternative languages
Result language
angličtina
Original language name
Influence of hexagonal boron nitride nanosheets on phase transformation, microstructure evolution and mechanical properties of Si3N4 ceramics
Original language description
Fully dense Si3N4 materials with 1 wt.% (- 1.5 vol.%) and 2 wt.% (- 3.0 vol.%) h-BN nanosheets were prepared by spark plasma sintering at 1750 degrees C with the dwell of 7 min under a pressure of 50 MPa in a vacuum. BN nanosheets with different dimensions were prepared by ultrasound-assisted liquid phase exfoliation of h-BN powder, followed by centrifugation at different speeds (1000 rpm and 3000 rpm). The addition of BN nanosheets hindered the particle rearrangement stage of sintering, which resulted in the delayed alpha>beta phase transformation of Si3N4. To study a direct effect of BN nanosheets on the mechanical properties of Si3N4, the results were compared to the monolithic Si3N4 with similar grain size and alpha/beta-Si3N4 ratio. The addition of 2 wt.% h-BN nanosheets (1000 rpm) increased both the fracture toughness (- 26 %) and the strength (- 45 %) of Si3N4, when compared to the monolithic Si3N4 with similar microstructure.
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
20504 - Ceramics
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
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 the European Ceramic Society
ISSN
0955-2219
e-ISSN
1873-619X
Volume of the periodical
41
Issue of the periodical within the volume
10
Country of publishing house
GB - UNITED KINGDOM
Number of pages
17
Pages from-to
5115-5126
UT code for WoS article
000651914800004
EID of the result in the Scopus database
2-s2.0-85102010027