Detail publikačního výsledku

Microstructure, chemistry, phase composition, and stress-induced transformability of abnormal grains in DC flash sintered 3 mol% yttria-stabilized zirconia

PRAJZLER, V.; TODD, R.; ŠIŠKA VIRÁGOVÁ, E.; ZALESAK, J.; PONGRÁCZ, J.; MARVEL, C.; HARMER, M.; ŠŤASTNÝ, P.

Originální název

Microstructure, chemistry, phase composition, and stress-induced transformability of abnormal grains in DC flash sintered 3 mol% yttria-stabilized zirconia

Anglický název

Microstructure, chemistry, phase composition, and stress-induced transformability of abnormal grains in DC flash sintered 3 mol% yttria-stabilized zirconia

Druh

Článek WoS

Originální abstrakt

Abnormal grain growth was triggered by DC flash sintering in 3 mol% yttria-stabilised zirconia (3YSZ). The abnormal grains exceeded 100 & micro;m in size and exhibited a tetragonal structure, as confirmed by X-ray diffraction and Raman spectroscopy. No spontaneous transformation to the monoclinic phase was observed in the sintered samples. Transmission electron microscopy revealed that the abnormal grains consisted of thin Y-lean and Y-rich lamellae, similar to those previously reported in the early stages of high-temperature decomposition of the nontransformable tetragonal (t') phase in zirconia with higher yttria contents. Electrochemically reduced 3YSZ is considered to mimic the behaviour of zirconia compositions with higher yttria contents. The coherency and small domain size of the lamellar structure provide additional stability, preventing spontaneous transformation of the abnormal grains to the monoclinic polymorph. Nevertheless, it is shown that transformation to the monoclinic phase can still be triggered by stress associated with an indentation crack.

Anglický abstrakt

Abnormal grain growth was triggered by DC flash sintering in 3 mol% yttria-stabilised zirconia (3YSZ). The abnormal grains exceeded 100 & micro;m in size and exhibited a tetragonal structure, as confirmed by X-ray diffraction and Raman spectroscopy. No spontaneous transformation to the monoclinic phase was observed in the sintered samples. Transmission electron microscopy revealed that the abnormal grains consisted of thin Y-lean and Y-rich lamellae, similar to those previously reported in the early stages of high-temperature decomposition of the nontransformable tetragonal (t') phase in zirconia with higher yttria contents. Electrochemically reduced 3YSZ is considered to mimic the behaviour of zirconia compositions with higher yttria contents. The coherency and small domain size of the lamellar structure provide additional stability, preventing spontaneous transformation of the abnormal grains to the monoclinic polymorph. Nevertheless, it is shown that transformation to the monoclinic phase can still be triggered by stress associated with an indentation crack.

Klíčová slova

Flash sintering, Zirconium oxide, Abnormal grains, Phase stability

Klíčová slova v angličtině

Flash sintering, Zirconium oxide, Abnormal grains, Phase stability

Autoři

PRAJZLER, V.; TODD, R.; ŠIŠKA VIRÁGOVÁ, E.; ZALESAK, J.; PONGRÁCZ, J.; MARVEL, C.; HARMER, M.; ŠŤASTNÝ, P.

Vydáno

01.10.2026

Nakladatel

Elsevier

Periodikum

Journal of the European Ceramic Society

Svazek

46

Číslo

13

Stát

Spojené království Velké Británie a Severního Irska

Strany počet

11

URL

https://www.sciencedirect.com/science/article/pii/S0955221926003080?pes=vor&utm_source=clarivate&getft_integrator=clarivate

BibTex

@article{BUT212340,
  author="Vladimír {Prajzler} and  {} and Eliška {Šiška Virágová} and  {} and Jakub {Pongrácz} and  {} and  {} and Přemysl {Šťastný}",
  title="Microstructure, chemistry, phase composition, and stress-induced transformability of abnormal grains in DC flash sintered 3 mol% yttria-stabilized zirconia",
  journal="Journal of the European Ceramic Society",
  year="2026",
  volume="46",
  number="13",
  pages="11",
  doi="10.1016/j.jeurceramsoc.2026.118432",
  issn="0955-2219",
  url="https://www.sciencedirect.com/science/article/pii/S0955221926003080?pes=vor&utm_source=clarivate&getft_integrator=clarivate"
}