Processing and sintering of ultrafine MgO-ZrO sub 2 and MgO,Y sub 2 O sub 3 -ZrO sub 2 powders

Journal Article · Fri Jun 01 00:00:00 EDT 1990 · Journal of the American Ceramic Society; (USA)

DOI:https://doi.org/10.1111/j.1151-2916.1990.tb09786.x· OSTI ID:6336298

Readey, M J; Lee, R R; Halloran, J W; Heuer, A H ^[1]

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1. Dept. of Materials Science and Engineering, Case Western Reserve Univ., Cleveland, OH (US)

This paper reports chemical coprecipitation used to produce ultrafine and easily sinterable MgO-stabilized and (MgO,Y{sub 2}O{sub 3})-stabilized ZrO{sub 2} powders. The sintering behavior is very sensitive to post-precipitation washing because hard agglomerates form when the precipitated gels are washed with water, whereas soft agglomerates form when they are washed with ethanol. The soft agglomerates pack uniformly, resulting in homogeneous shrinkage of powder compacts to near-theoretical density. The hard agglomerates result in compacts which have regions of localized densification and a significant fraction of residual porosity.

• OSTI ID: 6336298
• Journal Information: Journal of the American Ceramic Society; (USA), Vol. 73:6; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
MAGNESIUM OXIDES
SINTERING
YTTRIUM OXIDES
ZIRCONIUM OXIDES
AGGLOMERATION
CHEMICAL REACTION KINETICS
COMPACTS
COPRECIPITATION
ETHANOL
ALCOHOLS
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
FABRICATION
HYDROXY COMPOUNDS
KINETICS
MAGNESIUM COMPOUNDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PRECIPITATION
REACTION KINETICS
SEPARATION PROCESSES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
ZIRCONIUM COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies
400201 - Chemical & Physicochemical Properties