Publication detail

Rapid densification of low-positive thermal expansion Al2W3O12 ceramics

MAŘÁK, V. HENRIQUES, M. MARINKOVIC, B. DRDLÍK, D.

Original Title

Rapid densification of low-positive thermal expansion Al2W3O12 ceramics

Type

journal article in Web of Science

Language

English

Original Abstract

The Al2W3O12 ceramic with near-zero thermal expansion is a promising candidate for thermal shock resistance applications. However, the often-reported microcracks in the microstructure hinder the practical use of Al2W3O12. This work focuses on optimising the material processing—powder synthesis, calcination, milling, and sintering—to prepare dense polycrystalline Al2W3O12 with fine microcrack-free microstructure. The amorphous powder produced by the co-precipitation method had the highest specific surface area reported for this material, resulting in improved sinterability. Two rapid sintering methods were employed—Rapid Pressure-less Sintering and Spark Plasma Sintering. Both methods led to shorter processing times and lower sintering temperatures. However, Al2W3O12 samples produced by Spark Plasma Sintering were nearly fully dense with a density of ∼98% of theoretical density, the best value reported to date for this phase. The obtained fine crack-free microstructure of the samples led to a superior mechanical response compared to that achieved by Rapid Pressure-less Sintering.

Keywords

Near-zero thermal expansion, A2M3O12, Spark plasma sintering, Rapid pressure-less sintering, Vickers hardness

Authors

MAŘÁK, V.; HENRIQUES, M.; MARINKOVIC, B.; DRDLÍK, D.

Released

1. 9. 2024

Publisher

Elsevier

ISBN

0955-2219

Periodical

Journal of the European Ceramic Society

Year of study

44

Number

11

State

United Kingdom of Great Britain and Northern Ireland

Pages from

6548

Pages to

6555

Pages count

8

URL

https://www.sciencedirect.com/science/article/pii/S0955221924003583?via%3Dihub

BibTex

@article{BUT188424,
  author="Vojtěch {Mařák} and Marianne Diniz Rocha {Henriques} and Bojan A. {Marinkovic} and Daniel {Drdlík}",
  title="Rapid densification of low-positive thermal expansion Al2W3O12 ceramics",
  journal="Journal of the European Ceramic Society",
  year="2024",
  volume="44",
  number="11",
  pages="6548--6555",
  doi="10.1016/j.jeurceramsoc.2024.04.036",
  issn="0955-2219",
  url="https://www.sciencedirect.com/science/article/pii/S0955221924003583?via%3Dihub"
}