Detail publikace

Dvojstupňové slinování keramických materiálů s různými krystalovými strukturami

MACA, K. POUCHLÝ, V. ŽALUD, P.

Český název

Dvojstupňové slinování keramických materiálů s různými krystalovými strukturami

Anglický název

Two-Step Sintering of Oxide Ceramics with Various Crystal Structures

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

en

Originální abstrakt

The influence of Two-Step Sintering (TSS) process on the final microstructure of oxide ceramic materials with three different crystal structures was studied. Two kinds of alumina (particle size 100nm resp. 240nm) as well as tetragonal zirconia (stabilized with 3mol%Y2O3, particle size 60nm) and cubic zirconia (8mol%Y2O3, 140nm) powders were cold isostatically pressed and pressureless sintered with different heating schedules. The microstructures achieved with TSS method were compared with microstructures achieved with conventional Single-Step Sintering schedule (SSS). The results showed that the efficiency of the TSS of these oxide ceramics was more dependent on their crystal structure than on their particle size and green body microstructure. The method of TSS brought only negligible improvement of the microstructure of tetragonal zirconia and hexagonal alumina ceramics. On the other hand, TSS was successful in the sintering of cubic zirconia ceramics; it led to a decrease in grain size by a factor of 2.

Český abstrakt

Byl studován vliv dvojstupňového slinování na mikrostrukturu keramických materiálů s rozdílnými krystalovými strukturami. Výsledky ukázaly, že efktivita dvojstupňového slinování je více závislá na krystalové struktuře než na velikosti částic a mikrostruktuře keramického polotovaru. Dvojstupňové slinování znamenalo jen zanedbatelné zlepšení mikrostruktury tetragonálního ZrO2 a hexagonálního Al2O3, naopak bylo výhodné pro slinování kubického ZrO2 – znamenalo pokles velikosti zrn na polovinu.

Anglický abstrakt

The influence of Two-Step Sintering (TSS) process on the final microstructure of oxide ceramic materials with three different crystal structures was studied. Two kinds of alumina (particle size 100nm resp. 240nm) as well as tetragonal zirconia (stabilized with 3mol%Y2O3, particle size 60nm) and cubic zirconia (8mol%Y2O3, 140nm) powders were cold isostatically pressed and pressureless sintered with different heating schedules. The microstructures achieved with TSS method were compared with microstructures achieved with conventional Single-Step Sintering schedule (SSS). The results showed that the efficiency of the TSS of these oxide ceramics was more dependent on their crystal structure than on their particle size and green body microstructure. The method of TSS brought only negligible improvement of the microstructure of tetragonal zirconia and hexagonal alumina ceramics. On the other hand, TSS was successful in the sintering of cubic zirconia ceramics; it led to a decrease in grain size by a factor of 2.

Klíčová slova česky

Dvojstupňové slinování, velikost zrn, Al21O3, ZrO2

Klíčová slova anglicky

Two-step sintering; Grain size, Microstructure-final; Al2O3, ZrO2

Rok RIV

2009

Vydáno

11.11.2009

Nakladatel

Elsevier

Místo

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

ISSN

0955-2219

Časopis

Journal of the European Ceramic Society

Ročník

30

Číslo

2

Strany od–do

583–589

Počet stran

7

BIBTEX


@article{BUT49264,
  author="Karel {Maca} and Václav {Pouchlý} and Pavel {Žalud},
  title="Two-Step Sintering of Oxide Ceramics with Various Crystal Structures",
  journal="Journal of the European Ceramic Society",
  year="2009",
  volume="30",
  number="2",
  month="November",
  pages="583--589",
  publisher="Elsevier",
  address="THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND",
  issn="0955-2219"
}