Publication detail

Abnormal grain growth in DC flash sintered 3-mol% yttria-stabilized zirconia ceramics

PRAJZLER, V. MACA, K. ŠŤASTNÝ, P. TODD, R.

Original Title

Type

journal article in Web of Science

Language

English

Original Abstract

The origin of nonuniform microstructure and abnormal grain growth (AGG) was investigated in flash sintered 3 mol% yttria-stabilized zirconia (3YSZ) ceramics. The microstructural homogeneity decreased with increasing direct current (DC) density and with dwell time in a flash state, eventually resulting in AGG in the specimen core, the first observation of AGG in 3YSZ. Abnormal grains up to 100 mu m in size emerged when the DC density was >= 160 mA/mm(2), and the specimen's density exceeded 99% of theoretical, starting from the cathode and propagating toward the anode. The results are discussed by comparison with established mechanisms and previous experimental evidence concerning AGG in oxides, focusing on the possible effects of the electrochemical reduction at the cathode end of the specimen.

Keywords

abnormal grain growth; field assisted sintering technology (FAST); grain growth; zirconia; yttria stabilized

Authors

PRAJZLER, V.; MACA, K.; ŠŤASTNÝ, P.; TODD, R.

Released

1. 9. 2022

Publisher

WILEY

Location

HOBOKEN

ISBN

0002-7820

Periodical

Journal of the American Ceramic Society

Year of study

105

Number

State

United States of America

Pages from

5562

Pages to

5568

Pages count

URL

https://ceramics.onlinelibrary.wiley.com/doi/10.1111/jace.18542

BibTex

@article{BUT178465,
  author="Vladimír {Prajzler} and Karel {Maca} and Přemysl {Šťastný} and Richard I. {Todd}",
  title="Abnormal grain growth in DC flash sintered 3-mol% yttria-stabilized zirconia ceramics",
  journal="Journal of the American Ceramic Society",
  year="2022",
  volume="105",
  number="9",
  pages="5562--5568",
  doi="10.1111/jace.18542",
  issn="0002-7820",
  url="https://ceramics.onlinelibrary.wiley.com/doi/10.1111/jace.18542"
}