Effect of SiC on densification, microstructure and mechanical properties of high entropy diboride (Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)B2

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F24%3A00585151" target="_blank" >RIV/68081723:_____/24:00585151 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0955221923010877?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0955221923010877?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jeurceramsoc.2023.12.072" target="_blank" >10.1016/j.jeurceramsoc.2023.12.072</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of SiC on densification, microstructure and mechanical properties of high entropy diboride (Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)B2

Popis výsledku v původním jazyce

Highly dense high entropy diboride (Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)B2-SiC composites with different β-SiC content (5, 10, 15, 20 and 25 vol%) were prepared by Spark Plasma Sintering (SPS) at 1900 °C. High-purity high entropy diboride (HEB) powder was synthesized using boro/carbothermal reduction of oxide precursors at 1800 °C. X-ray diffraction patterns of the synthesized powders and sintered compacts of HEB showed a single solid solution with hexagonal AlB2 structure without any residual oxide impurities. Energy Dispersive X-ray Spectroscopy (EDS) mapping results indicated the uniform elemental distribution of transition metals in the HEB phase. The addition of SiC improved the densification of HEB-SiC composites. The composite with 20 vol% SiC exhibited a unique combination of mechanical properties, such as superior Vickers hardness (22.28 ± 0.25 GPa), flexural strength (750.21 ± 43.23 MPa), indentation fracture toughness (4.12 ± 0.2 MPa.m1/2), Young's modulus (495.3 ± 0.3 GPa) and dynamic oxidation resistance (0.02 mg.cm−2.s−1).

Název v anglickém jazyce

Effect of SiC on densification, microstructure and mechanical properties of high entropy diboride (Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)B2

Popis výsledku anglicky

Highly dense high entropy diboride (Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)B2-SiC composites with different β-SiC content (5, 10, 15, 20 and 25 vol%) were prepared by Spark Plasma Sintering (SPS) at 1900 °C. High-purity high entropy diboride (HEB) powder was synthesized using boro/carbothermal reduction of oxide precursors at 1800 °C. X-ray diffraction patterns of the synthesized powders and sintered compacts of HEB showed a single solid solution with hexagonal AlB2 structure without any residual oxide impurities. Energy Dispersive X-ray Spectroscopy (EDS) mapping results indicated the uniform elemental distribution of transition metals in the HEB phase. The addition of SiC improved the densification of HEB-SiC composites. The composite with 20 vol% SiC exhibited a unique combination of mechanical properties, such as superior Vickers hardness (22.28 ± 0.25 GPa), flexural strength (750.21 ± 43.23 MPa), indentation fracture toughness (4.12 ± 0.2 MPa.m1/2), Young's modulus (495.3 ± 0.3 GPa) and dynamic oxidation resistance (0.02 mg.cm−2.s−1).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20504 - Ceramics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Journal of the European Ceramic Society

ISSN

0955-2219

e-ISSN

1873-619X

Svazek periodika

44

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

5358-5369

Kód UT WoS článku

001226350100001

EID výsledku v databázi Scopus

2-s2.0-85182006061