Detail publikačního výsledku

Liquid phase sintering of yttrium oxide: The effect of Al2O3 and SiO2 additives

Najafzadehkhoee, A; Talimian, A; Girman, V; Sedlák, R; Hvizdos, P; Maca, K; Galusek, D

Originální název

Liquid phase sintering of yttrium oxide: The effect of Al2O3 and SiO2 additives

Anglický název

Liquid phase sintering of yttrium oxide: The effect of Al2O3 and SiO2 additives

Druh

Článek WoS

Originální abstrakt

Solid-state sintering of Y2O3 is difficult and requires high-temperature heat treatment or the use of a sintering additive. In this study, liquid-phase sintering was utilized to produce dense Y2O3 bodies with fine-grained microstructure. Al2O3 and SiO2 were added to a commercial nano-Y2O3 powder using aluminum nitrate and tetraethylorthosilicate (TEOS) as the precursors; the samples were uniaxially pressed at 100 MPa and sintered at 1500 degrees C and 1650 degrees C. The addition of the sintering aids increased the relative density of the samples sintered at lower temperatures; also, the sintering aids suppressed grain growth. The dissolution of Y2O3 into the liquid phase changes the solid-liquid interfacial energy resulting in the formation of isolated yttrium-silicate/yttriumaluminate grains and accounts for the suppression of the growth of yttria grains.

Anglický abstrakt

Solid-state sintering of Y2O3 is difficult and requires high-temperature heat treatment or the use of a sintering additive. In this study, liquid-phase sintering was utilized to produce dense Y2O3 bodies with fine-grained microstructure. Al2O3 and SiO2 were added to a commercial nano-Y2O3 powder using aluminum nitrate and tetraethylorthosilicate (TEOS) as the precursors; the samples were uniaxially pressed at 100 MPa and sintered at 1500 degrees C and 1650 degrees C. The addition of the sintering aids increased the relative density of the samples sintered at lower temperatures; also, the sintering aids suppressed grain growth. The dissolution of Y2O3 into the liquid phase changes the solid-liquid interfacial energy resulting in the formation of isolated yttrium-silicate/yttriumaluminate grains and accounts for the suppression of the growth of yttria grains.

Klíčová slova

Liquid-phase sintering; Grain growth; Eutectic

Klíčová slova v angličtině

Liquid-phase sintering; Grain growth; Eutectic

Autoři

Najafzadehkhoee, A; Talimian, A; Girman, V; Sedlák, R; Hvizdos, P; Maca, K; Galusek, D

Rok RIV

2025

Vydáno

01.01.2024

Nakladatel

ELSEVIER SCI LTD

Místo

OXFORD

ISSN

1873-619X

Periodikum

Journal of the European Ceramic Society

Svazek

44

Číslo

1

Stát

Spojené království Velké Británie a Severního Irska

Strany od

383

Strany do

392

Strany počet

10

URL

https://www.sciencedirect.com/science/article/pii/S0955221923006817?via%3Dihub

BibTex

@article{BUT196711,
  author="Karel {Maca} and Aliasghar {Najafzadehkhoee} and Ali {Talimian} and Vladimir {Girman} and Richard {Sedlák} and Pavol {Hvizdoš} and Dušan {Galusek}",
  title="Liquid phase sintering of yttrium oxide: The effect of Al2O3 and SiO2 additives",
  journal="Journal of the European Ceramic Society",
  year="2024",
  volume="44",
  number="1",
  pages="383--392",
  doi="10.1016/j.jeurceramsoc.2023.08.055",
  issn="0955-2219",
  url="https://www.sciencedirect.com/science/article/pii/S0955221923006817?via%3Dihub"
}