Atmospheric plasma sprayed Forsterite (Mg2SiO4) coatings : an investigation of the processing-microstructure-performance relationship

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DOIResolve DOI: http://doi.org/10.1007/s11666-012-9856-9
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TypeArticle
Journal titleJournal of Thermal Spray Technology
Volume22
Issue2-3
Pages145151; # of pages: 7
Subjectcoefficient of thermal expansion; dielectric coatings; dielectric strength; forsterite; plasma-spray
AbstractEvaluating and understanding the relationship between processing, microstructure and performance of a dielectric coating is essential for its practical usage and reliable application. In this study, the role of the powder feedstock on the properties of atmospheric plasma sprayed forsterite (Mg₂SiO₄) dielectric coatings was investigated by using different forsterite powder granulometries. The microstructural and porosity characteristics of the coatings associated with the spray conditions employed were assessed via scanning electron microscopy (SEM) and image analysis. The phase composition of the coatings was studied via x-ray diffraction and their crystallinity index determined. The electrical insulating characteristics were investigated using the dielectric breakdown test and impedance spectroscopy measurements. The electrical properties obtained were correlated with the microstructural characteristics and a performance comparison between forsterite and other dielectric coatings is presented.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; Automotive; NRC Industrial Materials Institute
Peer reviewedYes
NRC number140247
NPARC number21268114
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Record identifier0b345b47-e97c-4a8e-a32a-3f68163938e9
Record created2013-04-12
Record modified2016-05-09
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