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Emulsion Precipitation of Yttria‐Stabilized Zirconia for Plasma Spray Coatings
Author(s) -
Sherif Fawzy G.,
Shyu LiehJiun
Publication year - 1991
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1991.tb06890.x
Subject(s) - yttria stabilized zirconia , materials science , calcination , cubic zirconia , chemical engineering , particle size , thermal spraying , coating , particle (ecology) , emulsion , precipitation , tetragonal crystal system , solution precursor plasma spray , gas dynamic cold spray , phase (matter) , mineralogy , metallurgy , composite material , ceramic , catalysis , chemistry , organic chemistry , oceanography , physics , meteorology , engineering , geology
Chemically uniform, high‐purity, yttria‐stabilized zirconia (YSZ) powders were prepared by emulsion hydrolysis of the 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°C was 100% nontransformable tetragonal. The powders were successfully sprayed by a plasma coating technique on stainless steel coupons, and the coatings were evaluated.