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Plasma Spray of Nano Composite Ceramics Using Solution Precursors and Combustion Synthesized Nano Powders

Published online by Cambridge University Press:  31 January 2011

Chigozie Kenechukwu Muoto ,
Eric H. Jordan ,
Maurice Gell  and
Mark Aindow
Chigozie Kenechukwu Muoto
Affiliation:
muotoc@gmail.comchigozie.muoto@uconn.edu, University of Connecticut, Chemical, Materials & Biomolecular Engineering, Storrs, Connecticut, United States
Eric H. Jordan
Affiliation:
jordan@engr.uconn.edu, University of Connecticut, Mechanical Engineering, Storrs, Connecticut, United States
Maurice Gell
Affiliation:
mgell@mail.ims.uconn.edu, University of Connecticut, Chemical, Materials & Biomolecular Engineering, Storrs, Connecticut, United States
Mark Aindow
Affiliation:
m.aindow@uconn.edu, University of Connecticut, Chemical, Materials & Biomolecular Engineering, Storrs, Connecticut, United States
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Abstract

Plasma spraying is a well-established method for depositing nanostructured ceramic coatings on structural components. Two different plasma spraying techniques - solution precursor plasma spray (SPPS) and suspension plasma spray (SPS) - have been used to produce MgO-50vol% ZrO2 composite coatings. The microstructural features of the coatings were characterized using Environmental Scanning Electron Microscopy (ESEM) and X-Ray Diffractometry (XRD). The micro hardness of the coatings was measured on cross-sectional samples. The coatings produced using the SPS process with ethanol-based suspensions at a high plasma torch power (45.5 kW) exhibited the densest microstructures with hardnesses as high as ∼1350 HV. However, the backscattered electron (BSE) ESEM characterization of these coatings revealed that the coatings obtained using the SPPS technique had superior chemical homogeneity over those obtained using the SPS technique.

Keywords

plasma depositionceramicmicrostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1195: Symposium B – Rellliability and Materials Issues of Semiconductor Optical and Electrical Devices and Materials , 2009 , 1195-B12-03
Copyright
Copyright © Materials Research Society 2010

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