Effect of calcination on the sintering of gel-derived zirconia-toughened alumina

Journal Article · Thu Sep 01 00:00:00 EDT 1994 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1994.tb04608.x· OSTI ID:6988890

Exter, P den; Winnubst, L; Leuwerink, T H.P.; Burggraaf, A J ^[1]

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1. Univ. of Twente, Enschede (Netherlands). Lab. of Inorganic Chemistry Materials Science and Catalysis

The densification behavior of ZrO[sub 2] (+3 mol% Y[sub 2]O[sub 3])/85 wt% Al[sub 2]O[sub 3] powder compacts, prepared by the hydrolysis of metal chlorides, can be characterized by a transition- and an [alpha]-alumina densification stage. The sintering behavior is strongly determined by the densification of the transition alumina aggregates. Intra-aggregate porosity, resulting from calcination at 800 C, partly persists during sintering and alumina phase transformation and negatively influences further macroscopic densification. Calcination at 1,200 C, however, densities the transition alumina aggregates prior to sintering and enables densification to almost full density (96%) within 2 h at 1,450 C, thus obtaining a microstructure with an alumina and a zirconia grain size of 1[mu]m and 0.3--0.4[mu]m, respectively.

• OSTI ID: 6988890
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 77:9; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
CRYSTAL-PHASE TRANSFORMATIONS
DATA
EXPERIMENTAL DATA
FABRICATION
INFORMATION
MICROSTRUCTURE
MORPHOLOGY
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
SINTERING
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES