Publication detail

Zirconia spacer electrodes improve microstructural uniformity of flash sintered zirconia ceramics

PRAJZLER, V. TODD, R.

Original Title

Zirconia spacer electrodes improve microstructural uniformity of flash sintered zirconia ceramics

Type

journal article in Web of Science

Language

English

Original Abstract

The sample-electrode contact often represents the most problematic part of the flash sintering circuit. We demonstrate that adding 3 mol% yttria-stabilized zirconia (3YSZ) spacer electrodes between a 3YSZ powder compact and steel electrodes positively impacts the final density and microstructure in AC flash sintering. The 3YSZ spacer electrodes, with intrinsically low thermal conductivity, were also heated by Joule heating alongside the 3YSZ sample, reducing the temperature gradient at the specimen-electrode interface and limiting heat loss from the specimen. A reference 3YSZ sample, which was sintered with stainless steel electrodes only, reached 98.2% of relative density with a notable grain size difference between the central (similar to 290 nm) and near-electrode parts (similar to 160 nm). The addition of 3YSZ spacer electrodes improved the final density to 98.9 % and reduced the grain size difference between the central (similar to 300 nm) and near-electrode parts (similar to 220 nm) almost by half compared to the reference sample.

Keywords

flash sintering; microstructure; zirconia

Authors

PRAJZLER, V.; TODD, R.

Released

1. 5. 2025

Publisher

WILEY

Location

HOBOKEN

ISBN

1744-7402

Periodical

International Journal of Applied Ceramic Technology

Year of study

22

Number

3

State

United States of America

Pages count

7

URL

https://ceramics.onlinelibrary.wiley.com/doi/10.1111/ijac.15037

BibTex

@article{BUT198140,
  author="Vladimír {Prajzler} and Richard I. {Todd}",
  title="Zirconia spacer electrodes improve microstructural uniformity of flash sintered zirconia ceramics",
  journal="International Journal of Applied Ceramic Technology",
  year="2025",
  volume="22",
  number="3",
  pages="7",
  doi="10.1111/ijac.15037",
  issn="1744-7402",
  url="https://ceramics.onlinelibrary.wiley.com/doi/10.1111/ijac.15037"
}