Publication detail

Processing of zirconia nanoceramics from a coarse powder

KOCJAN, A. POUCHLÝ, V. SHEN, Z.

Original Title

Processing of zirconia nanoceramics from a coarse powder

Type

journal article in Web of Science

Language

English

Original Abstract

We have merged the benefits of coarse-grained and nanocrystalline powders by the consolidation and sintering of coarse, yet nanostructured,mesoporous Y-TZP powder. The powder was composed of loosely aggregated, nanoscale crystallites, which can be seen as secondary particles oragglomerates. Their homogeneous, defect-free packing proved to be a viable pathway for the processing of zirconia nanoceramics. The powderconsolidation yielded homogeneous green bodies with hierarchical heterogeneities in terms of intra- and inter-particle pore packing. The hierarchicalheterogeneities had a pronounced effect on the densification and grain growth. The intra-particle pore coalescence along with a frozen inter-particle porosity, prolonged the pore-pinning effect, separating the densification and grain-growth mechanisms. Increased heating rates promoted thegrain growth and densification via a competitive mechanism of primary crystallite ordered coalescence, while by applying pressure, the crystallitegrowth was completely prevented, making such a coarse powder suitable for the fabrication of zirconia nanoceramics.

Keywords

Zirconia; Nanoceramic; Porosity; Sintering; Microstructure

Authors

KOCJAN, A.; POUCHLÝ, V.; SHEN, Z.

RIV year

2015

Released

1. 4. 2015

ISBN

0955-2219

Periodical

Journal of the European Ceramic Society

Year of study

35

Number

4

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1285

Pages to

1295

Pages count

11

BibTex

@article{BUT111947,
  author="Andraž {Kocjan} and Václav {Pouchlý} and Zhijian {Shen}",
  title="Processing of zirconia nanoceramics from a coarse powder",
  journal="Journal of the European Ceramic Society",
  year="2015",
  volume="35",
  number="4",
  pages="1285--1295",
  doi="10.1016/j.jeurceramsoc.2014.10.022",
  issn="0955-2219"
}