Detail publikace

Processing of zirconia nanoceramics from a coarse powder

KOCJAN, A. POUCHLÝ, V. SHEN, Z.

Originální název

Processing of zirconia nanoceramics from a coarse powder

Anglický název

Processing of zirconia nanoceramics from a coarse powder

Jazyk

en

Originální abstrakt

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.

Anglický abstrakt

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.

Dokumenty

BibTex


@article{BUT111947,
  author="Andraž {Kocjan} and Václav {Pouchlý} and Zhijian {Shen}",
  title="Processing of zirconia nanoceramics from a coarse powder",
  annote="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.",
  chapter="111947",
  doi="10.1016/j.jeurceramsoc.2014.10.022",
  number="4",
  volume="35",
  year="2015",
  month="april",
  pages="1285--1295",
  type="journal article in Web of Science"
}