Publication detail

Processing and properties of nanocrystalline tetragonal zirconia

TRUNEC, M. MACA, K.

Original Title

Processing and properties of nanocrystalline tetragonal zirconia

Type

journal article - other

Language

English

Original Abstract

Zirconia nanopowders (stabilized by 1.5 and 3 mol% Y2O3) with particle size below 10 nm were compacted by cold isostatic pressing. Pressureless sintering and hot isostatic pressing were applied to obtain dense nanocrystalline ceramics. The influence of the pore size in powder compacts on sintering behaviour was investigated. Green bodies pressed at 1000 MPa had a maximum pore size of 5 nm. These bodies were densified to a relative density of over 99.6% with an average grain size about 85 nm by pressureless sintering at 1100 degC. Indentation techniques were used to evaluate the hardness and fracture toughness of zirconia nanoceramics. The decrease in the yttria content from 3 to 1.5 mol% resulted in the toughness increasing from 5.3 to 11.1 MPa m^0.5. The differences in fracture toughness of zirconia ceramics prepared with different yttria contents and by different sintering methods were discussed and their possible causes were proposed.

Keywords

zirconia, nanopowder, pore size, sintering, indentation, fracture toughness

Authors

TRUNEC, M.; MACA, K.

RIV year

2007

Released

1. 1. 2007

Publisher

Trans Tech Publications

Location

Curich, Švýcarsko

ISBN

1013-9826

Periodical

Key Engineering Materials (print)

Year of study

336-338

Number

4

State

Swiss Confederation

Pages from

2300

Pages to

2303

Pages count

4

URL

http://www.scientific.net

BibTex

@article{BUT43822,
  author="Martin {Trunec} and Karel {Maca}",
  title="Processing and properties of nanocrystalline tetragonal zirconia",
  journal="Key Engineering Materials (print)",
  year="2007",
  volume="336-338",
  number="4",
  pages="2300--2303",
  issn="1013-9826",
  url="http://www.scientific.net"
}