Fabrication of tailored alumina-based ceramics through colloidal processing

Yoshio Sakka, Tohru Suzuki, Keijiro Hiraga

Research output: Contribution to journalConference article

5 Citations (Scopus)

Abstract

Super-plastic zirconia-dispersed alumina ceramics with fine-grained microstructure and the other is highly textured alumina were prepared. Colloidal processing was applied to obtain dense and homogeneous zirconia-dispersed alumina ceramics with mean grain size of 0.45 μm. Large tensile elongation exceeding 550% was achieved for 10 vol% zirconia-dispersed Al 2 O 3 at 1773 K. High magnetic field (10T) was applied during slip casting of alumina suspension to produce textured microstructure. Green body with slight degree of crystallographic orientation was obtained and the degree of texture increased with increasing temperature. After densification, alumina grains grow to yield ceramics with textured grains and high degrees of crystallographic orientation. This processing can be applied to other ceramics with asymmetric unit cell.

Original languageEnglish
Pages (from-to)619-622
Number of pages4
JournalKey Engineering Materials
Volume224-226
Publication statusPublished - 2002 Dec 3
Externally publishedYes
EventProceedings of the Second China International Conference on High-Performance Ceramics (CICC-2) - Kunming, China
Duration: 2001 Nov 112001 Nov 15

Fingerprint

Aluminum Oxide
Alumina
Fabrication
Zirconia
Processing
Microstructure
Densification
Elongation
Suspensions
Casting
Textures
Magnetic fields
Plastics
zirconium oxide
Temperature

Keywords

  • Al O
  • Colloidal processing
  • High magnetic field
  • Super-plasticity
  • Textured structure

ASJC Scopus subject areas

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

Cite this

Fabrication of tailored alumina-based ceramics through colloidal processing. / Sakka, Yoshio; Suzuki, Tohru; Hiraga, Keijiro.

In: Key Engineering Materials, Vol. 224-226, 03.12.2002, p. 619-622.

Research output: Contribution to journalConference article

Sakka, Y, Suzuki, T & Hiraga, K 2002, 'Fabrication of tailored alumina-based ceramics through colloidal processing', Key Engineering Materials, vol. 224-226, pp. 619-622.
Sakka, Yoshio ; Suzuki, Tohru ; Hiraga, Keijiro. / Fabrication of tailored alumina-based ceramics through colloidal processing. In: Key Engineering Materials. 2002 ; Vol. 224-226. pp. 619-622.
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AB - Super-plastic zirconia-dispersed alumina ceramics with fine-grained microstructure and the other is highly textured alumina were prepared. Colloidal processing was applied to obtain dense and homogeneous zirconia-dispersed alumina ceramics with mean grain size of 0.45 μm. Large tensile elongation exceeding 550% was achieved for 10 vol% zirconia-dispersed Al 2 O 3 at 1773 K. High magnetic field (10T) was applied during slip casting of alumina suspension to produce textured microstructure. Green body with slight degree of crystallographic orientation was obtained and the degree of texture increased with increasing temperature. After densification, alumina grains grow to yield ceramics with textured grains and high degrees of crystallographic orientation. This processing can be applied to other ceramics with asymmetric unit cell.

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