Colloidal processing and superplastic proprties of fine-grained zirconia-based ceramics

Y. Sakka, Tohru Suzuki, K. Morita, K. Hiraga

Research output: Contribution to journalConference article

8 Citations (Scopus)

Abstract

Colloidal processing was applied to obtain dense and homogeneous yttria-doped tetragonal zirconia (YTZ), alumina-dispersed YTZ, and magnesia- and titania-doped YTZ. Their slurries were prepared by adding appropriate amounts of polyelectrolyte, and their fine-grained bodies were obtained through slip casting, cold isostatic pressing and low-temperature sintering. The obtained bodies show excellent superplastic properties. In particular alumina addition was found to (1) decrease the limit temperature of superplasticity in YTZ to 1573 K or lower, (2) increase the limit strain rate for large elongation exceeding 300% up to 1.2×10-2 s-1 at 1573 K and (3) large tensile elongation exceeding 1000% at 1.7×10-4 s-1. The effects of microstructure such as grain size, grain-boundary structure and cavity density on the superplastic properties are discussed by comparison with the conventionally prepared samples. The creep parameters prepared by the colloidal processing were similar to those prepared by conventional dry processing. Their excellent superplasticities are due to the reduction of residual defects, fine-grained and homogeneous microstructures.

Original languageEnglish
Pages (from-to)645-648
Number of pages4
JournalKey Engineering Materials
Volume206-213
Issue numberI
Publication statusPublished - 2001 Nov 10
Externally publishedYes
Event7th Conference of the European Ceramic Society - Brugge, Belgium
Duration: 2001 Sep 92001 Sep 13

Fingerprint

Yttrium oxide
Zirconia
Superplasticity
Aluminum Oxide
Processing
Elongation
Alumina
Magnesium Oxide
Microstructure
Magnesia
Slurries
Polyelectrolytes
Strain rate
Creep
Casting
Grain boundaries
Sintering
Titanium
Temperature
Defects

Keywords

  • Colloidal processing
  • Fine-grained ceramics
  • Superplasticity
  • Tetragonal zirconia

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Colloidal processing and superplastic proprties of fine-grained zirconia-based ceramics. / Sakka, Y.; Suzuki, Tohru; Morita, K.; Hiraga, K.

In: Key Engineering Materials, Vol. 206-213, No. I, 10.11.2001, p. 645-648.

Research output: Contribution to journalConference article

Sakka, Y. ; Suzuki, Tohru ; Morita, K. ; Hiraga, K. / Colloidal processing and superplastic proprties of fine-grained zirconia-based ceramics. In: Key Engineering Materials. 2001 ; Vol. 206-213, No. I. pp. 645-648.
@article{fa1b4c1e81054f53b4f7e51f2af175be,
title = "Colloidal processing and superplastic proprties of fine-grained zirconia-based ceramics",
abstract = "Colloidal processing was applied to obtain dense and homogeneous yttria-doped tetragonal zirconia (YTZ), alumina-dispersed YTZ, and magnesia- and titania-doped YTZ. Their slurries were prepared by adding appropriate amounts of polyelectrolyte, and their fine-grained bodies were obtained through slip casting, cold isostatic pressing and low-temperature sintering. The obtained bodies show excellent superplastic properties. In particular alumina addition was found to (1) decrease the limit temperature of superplasticity in YTZ to 1573 K or lower, (2) increase the limit strain rate for large elongation exceeding 300{\%} up to 1.2×10-2 s-1 at 1573 K and (3) large tensile elongation exceeding 1000{\%} at 1.7×10-4 s-1. The effects of microstructure such as grain size, grain-boundary structure and cavity density on the superplastic properties are discussed by comparison with the conventionally prepared samples. The creep parameters prepared by the colloidal processing were similar to those prepared by conventional dry processing. Their excellent superplasticities are due to the reduction of residual defects, fine-grained and homogeneous microstructures.",
keywords = "Colloidal processing, Fine-grained ceramics, Superplasticity, Tetragonal zirconia",
author = "Y. Sakka and Tohru Suzuki and K. Morita and K. Hiraga",
year = "2001",
month = "11",
day = "10",
language = "English",
volume = "206-213",
pages = "645--648",
journal = "Key Engineering Materials",
issn = "1013-9826",
publisher = "Trans Tech Publications",
number = "I",

}

TY - JOUR

T1 - Colloidal processing and superplastic proprties of fine-grained zirconia-based ceramics

AU - Sakka, Y.

AU - Suzuki, Tohru

AU - Morita, K.

AU - Hiraga, K.

PY - 2001/11/10

Y1 - 2001/11/10

N2 - Colloidal processing was applied to obtain dense and homogeneous yttria-doped tetragonal zirconia (YTZ), alumina-dispersed YTZ, and magnesia- and titania-doped YTZ. Their slurries were prepared by adding appropriate amounts of polyelectrolyte, and their fine-grained bodies were obtained through slip casting, cold isostatic pressing and low-temperature sintering. The obtained bodies show excellent superplastic properties. In particular alumina addition was found to (1) decrease the limit temperature of superplasticity in YTZ to 1573 K or lower, (2) increase the limit strain rate for large elongation exceeding 300% up to 1.2×10-2 s-1 at 1573 K and (3) large tensile elongation exceeding 1000% at 1.7×10-4 s-1. The effects of microstructure such as grain size, grain-boundary structure and cavity density on the superplastic properties are discussed by comparison with the conventionally prepared samples. The creep parameters prepared by the colloidal processing were similar to those prepared by conventional dry processing. Their excellent superplasticities are due to the reduction of residual defects, fine-grained and homogeneous microstructures.

AB - Colloidal processing was applied to obtain dense and homogeneous yttria-doped tetragonal zirconia (YTZ), alumina-dispersed YTZ, and magnesia- and titania-doped YTZ. Their slurries were prepared by adding appropriate amounts of polyelectrolyte, and their fine-grained bodies were obtained through slip casting, cold isostatic pressing and low-temperature sintering. The obtained bodies show excellent superplastic properties. In particular alumina addition was found to (1) decrease the limit temperature of superplasticity in YTZ to 1573 K or lower, (2) increase the limit strain rate for large elongation exceeding 300% up to 1.2×10-2 s-1 at 1573 K and (3) large tensile elongation exceeding 1000% at 1.7×10-4 s-1. The effects of microstructure such as grain size, grain-boundary structure and cavity density on the superplastic properties are discussed by comparison with the conventionally prepared samples. The creep parameters prepared by the colloidal processing were similar to those prepared by conventional dry processing. Their excellent superplasticities are due to the reduction of residual defects, fine-grained and homogeneous microstructures.

KW - Colloidal processing

KW - Fine-grained ceramics

KW - Superplasticity

KW - Tetragonal zirconia

UR - http://www.scopus.com/inward/record.url?scp=0034769219&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034769219&partnerID=8YFLogxK

M3 - Conference article

VL - 206-213

SP - 645

EP - 648

JO - Key Engineering Materials

JF - Key Engineering Materials

SN - 1013-9826

IS - I

ER -