Emulsion precipitation of yttria stabilized zirconia for plasma spray coatings

Journal Article · Fri Feb 01 04:00:00 EST 1991 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1991.tb06890.x· OSTI ID:5059662

Sherif, F G; Shyu, L J ^[1]

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1. Akzo Chemicals Inc., Dobbs Ferry, NY (US)

This paper reports on chemically uniform, high-purity, yttria-stabilized zirconia (YSZ) powders prepared by emulsion hydrolysis of metal alkoxides, acetates, and mixtures of alkoxides and acetates. Both the morphology and particle size of the powders can be controlled by varying the hydrolysis conditions. Spherical or granular powders with particle sizes ranging from submicrometer to a few hundred micrometers were obtained. X-ray diffraction and EDX results showed that yttria was evenly distributed throughout the zirconia particles. The crystalline phase of the powders after calcination at 800{degrees}C was 100% nontransformable tetragonal. The powders were successfully sprayed by a plasma coating technique on stainless steel coupons, and the coatings were evaluated.

• OSTI ID: 5059662
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 74:2; ISSN JACTA; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ALLOYS
CALCINATION
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COHERENT SCATTERING
DECOMPOSITION
DEPOSITION
DIFFRACTION
HIGH ALLOY STEELS
HYDROLYSIS
IRON ALLOYS
IRON BASE ALLOYS
LYSIS
OXIDES
OXYGEN COMPOUNDS
PLASMA ARC SPRAYING
POWDERS
PRECIPITATION
PYROLYSIS
SCATTERING
SEPARATION PROCESSES
SOLVOLYSIS
SPRAY COATING
STAINLESS STEELS
STEELS
SURFACE COATING
SYNTHESIS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES