Publication detail

Two-Step Sintering of Oxide Ceramics with Various Crystal Structures

MACA, K. POUCHLÝ, V. ŽALUD, P.

Original Title

Two-Step Sintering of Oxide Ceramics with Various Crystal Structures

English Title

Two-Step Sintering of Oxide Ceramics with Various Crystal Structures

Type

journal article in Web of Science

Language

en

Original Abstract

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.

English abstract

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.

Keywords

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

RIV year

2009

Released

11.11.2009

Publisher

Elsevier

Location

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

ISBN

0955-2219

Periodical

Journal of the European Ceramic Society

Year of study

30

Number

2

State

GB

Pages from

583

Pages to

589

Pages count

7

Documents

BibTex


@article{BUT49264,
  author="Karel {Maca} and Václav {Pouchlý} and Pavel {Žalud}",
  title="Two-Step Sintering of Oxide Ceramics with Various Crystal Structures",
  annote="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.",
  address="Elsevier",
  chapter="49264",
  institution="Elsevier",
  journal="Journal of the European Ceramic Society",
  number="2",
  volume="30",
  year="2009",
  month="november",
  pages="583--589",
  publisher="Elsevier",
  type="journal article in Web of Science"
}