Publication detail

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

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

Original Title

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

English Title

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

Type

journal article in Web of Science

Language

en

Original Abstract

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%.

English abstract

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%.

Keywords

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

RIV year

2015

Released

01.11.2015

Publisher

elsevier

Location

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

ISBN

0272-8842

Periodical

Ceramics International

Year of study

41

Number

9

State

GB

Pages from

11975

Pages to

11983

Pages count

9

Documents

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",
  annote="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%.",
  address="elsevier",
  chapter="121537",
  doi="10.1016/j.ceramint.2015.05.162",
  howpublished="online",
  institution="elsevier",
  number="9",
  volume="41",
  year="2015",
  month="november",
  pages="11975--11983",
  publisher="elsevier",
  type="journal article in Web of Science"
}