High-entropy spinel oxides: Self-propagating synthesis and densification by spark plasma sintering

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F25%3A00618519" target="_blank" >RIV/68081723:_____/25:00618519 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0955221925001736?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0955221925001736?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jeurceramsoc.2025.117353" target="_blank" >10.1016/j.jeurceramsoc.2025.117353</a>

Jazyk výsledku

angličtina

Název v původním jazyce

High-entropy spinel oxides: Self-propagating synthesis and densification by spark plasma sintering

Popis výsledku v původním jazyce

The self-propagating room temperature method was utilized to synthesize high-entropy spinel oxides (HESOs): (Co,Cr,Fe,Mn,Ni)3O4-delta, (Mg,Cr,Fe,Mn,Ni)3O4-delta, (Mg,Co,Fe,Cr,Mn)3O4-delta, (Mn,Zn,Fe,Ni,Cr)3O4-delta, and (Co,Mn,Zn, Fe,Cr)3O4-delta. After thermal treatment at 1000 degrees C, XRD analysis confirmed their single-phased spinel (Fd3m) structure. Densification by spark plasma sintering was successfully used for the first time on HESOs, resulting in relative densities from 94 % to 99 % while retaining the spinel structure. SEM/EDS mapping displayed a homogenous, dense microstructure with minimal porosity. (Mn,Zn,Fe,Ni,Cr)3O4-delta displayed the highest bending strength (171.5 MPa) and Young's modulus (188 GPa). (Mg,Co,Fe,Cr,Mn)3O4-delta demonstrated the highest hardness (8.8 GPa), while (Mg,Cr,Fe,Mn,Ni)3O4-delta exhibited the highest indentation fracture toughness (1.5 MPa m-1/ 2). The lowest thermal diffusivity (0.67 0.51 mm2 s-1) was recorded for (Co,Mn,Zn,Fe,Cr)3O4-delta, while (Co,Cr,Fe, Mn,Ni)3O4-delta, had the highest thermal diffusivity (0.82 0.58 mm2 s-1). The study demonstrated a simple and efficacious method of synthesizing and densifying HESOs with structural, mechanical, and thermal properties favourable for different applications.

Název v anglickém jazyce

High-entropy spinel oxides: Self-propagating synthesis and densification by spark plasma sintering

Popis výsledku anglicky

The self-propagating room temperature method was utilized to synthesize high-entropy spinel oxides (HESOs): (Co,Cr,Fe,Mn,Ni)3O4-delta, (Mg,Cr,Fe,Mn,Ni)3O4-delta, (Mg,Co,Fe,Cr,Mn)3O4-delta, (Mn,Zn,Fe,Ni,Cr)3O4-delta, and (Co,Mn,Zn, Fe,Cr)3O4-delta. After thermal treatment at 1000 degrees C, XRD analysis confirmed their single-phased spinel (Fd3m) structure. Densification by spark plasma sintering was successfully used for the first time on HESOs, resulting in relative densities from 94 % to 99 % while retaining the spinel structure. SEM/EDS mapping displayed a homogenous, dense microstructure with minimal porosity. (Mn,Zn,Fe,Ni,Cr)3O4-delta displayed the highest bending strength (171.5 MPa) and Young's modulus (188 GPa). (Mg,Co,Fe,Cr,Mn)3O4-delta demonstrated the highest hardness (8.8 GPa), while (Mg,Cr,Fe,Mn,Ni)3O4-delta exhibited the highest indentation fracture toughness (1.5 MPa m-1/ 2). The lowest thermal diffusivity (0.67 0.51 mm2 s-1) was recorded for (Co,Mn,Zn,Fe,Cr)3O4-delta, while (Co,Cr,Fe, Mn,Ni)3O4-delta, had the highest thermal diffusivity (0.82 0.58 mm2 s-1). The study demonstrated a simple and efficacious method of synthesizing and densifying HESOs with structural, mechanical, and thermal properties favourable for different applications.

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

2025

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

45

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

117353

Kód UT WoS článku

001442920200001

EID výsledku v databázi Scopus

2-s2.0-86000181447