Detail publikace

Grain growth suppression in alumina via doping and two-step sintering

BODIŠOVÁ, K. GALUSEK, D. ŠVANCÁREK, P. POUCHLÝ, V. MACA, K.

Originální název

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Efficiency of two-step sintering on grain growth elimination in the final stage of sintering of polycrystalline alumina has long been considered questionable. The published works failed either to suppress the grain growth entirely or to achieve the relative densities above 99% where the grain growth is the most severe. This paper reports on successful grain growth elimination in the final stage of sintering of a sub-micron alumina ceramics by a combination of the two-stage sintering and doping with metal oxides (MgO, ZrO2 or Y2O3). Relative densities up to 99.7% were achieved. Neither doping of aluminas sintered under conventional conditions nor the two-step sintering of pure alumina alone resulted in entire grain growth suppression in the final stage of sintering. A combination of the two-step heating regime with suitable doping (500 ppm MgO added as MgAl2O4 nanopowder) led to complete grain growth suppression at relative densities above 99%.

Klíčová slova

Grain growth; Sintering; Grain size; Alumina ceramics; Microstructure - final

Autoři

BODIŠOVÁ, K.; GALUSEK, D.; ŠVANCÁREK, P.; POUCHLÝ, V.; MACA, K.

Rok RIV

2015

Vydáno

1. 11. 2015

Nakladatel

elsevier

Místo

ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND

ISSN

0272-8842

Periodikum

Ceramics International

Ročník

Číslo

Stát

Spojené království Velké Británie a Severního Irska

Strany od

11975

Strany do

11983

Strany počet

BibTex

@article{BUT121537,
  author="Katarina {Drdlíková} and Dušan {Galusek} and Peter {Švancárek} and Václav {Pouchlý} and Karel {Maca}",
  title="Grain growth suppression in alumina via doping and two-step sintering",
  journal="Ceramics International",
  year="2015",
  volume="41",
  number="9",
  pages="11975--11983",
  doi="10.1016/j.ceramint.2015.05.162",
  issn="0272-8842"
}