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Fabrication of Zirconia Coatings using Electrophoretic Deposition and Reactive Sintering

Published online by Cambridge University Press:  11 February 2011

Ying Yuan ,
Xin Wang  and
Ping Xiao
Ying Yuan
Affiliation:
Manchester Materials Science Centre, University of Manchester, Grosvenor Street, Manchester, M1 7HS, U.K.
Xin Wang
Affiliation:
Manchester Materials Science Centre, University of Manchester, Grosvenor Street, Manchester, M1 7HS, U.K.
Ping Xiao*
Affiliation:
Manchester Materials Science Centre, University of Manchester, Grosvenor Street, Manchester, M1 7HS, U.K.
*
* Fax: +44 161 200 3586. Email address: Ping.Xiao@man.ac.uk
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Abstract

Electrophoretic deposition (EPD) technique has been used to fabricate green YSZ/Al composite coatings with controlled thickness and morphology. Such green coating was transformed into the YSZ/Al2O3 composite coating during following thermal treatment in air at temperatures up to 1200°C. Suspension for EPD was prepared by attrition-milling a mixture of yttria -stabilised zirconia (YSZ) and aluminium (Al) in acetyl-acetone (ACAC). The attrition milling reduced the particle size of the powder mixture. A mechanical alloying behaviour is believed to control the agglomeration and the breaking of large Al particles. Attrition milling also reduced the YSZ crystallite size, which can be attributed to the chemical reaction between YSZ/Al particles and ACAC. Thermal analyses and dilatometry measurements of the green compact indicate the temperature range for oxidation of Al and its effect on sintering of the coating. The coating obtained from EPD in the suspension after a longer milling time was found to have more uniform in microstructure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 750: Symposium Y – Surface Engineering 2002–Synthesis, Characterization and Applications , 2002 , Y5.24
Copyright
Copyright © Materials Research Society 2003

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References

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