Detail publikace

Processing and properties of nanocrystalline tetragonal zirconia

TRUNEC, M. MACA, K.

Originální název

Processing and properties of nanocrystalline tetragonal zirconia

Typ

článek v časopise - ostatní, Jost

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

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

Autoři

TRUNEC, M.; MACA, K.

Rok RIV

2007

Vydáno

1. 1. 2007

Nakladatel

Trans Tech Publications

Místo

Curich, Švýcarsko

ISSN

1013-9826

Periodikum

Key Engineering Materials (print)

Ročník

336-338

Číslo

4

Stát

Švýcarská konfederace

Strany od

2300

Strany do

2303

Strany počet

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"
}