Structural considerations in plasma spraying of the alumina zirconia composite

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DOIResolve DOI: http://doi.org/10.1016/j.surfcoat.2011.06.016
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TypeArticle
Journal titleSurface & Coatings Technology
Volume205
Issue23-24
Pages54375443; # of pages: 7
SubjectAtmospheric plasma spray; Amorphous phase; Ceramic nano-composite; Supersaturated solid solutions; Melting and mixing
AbstractThe focus of this study is the amorphous and crystalline phase formation in air plasma sprayed alumina yttria stabilized zirconia coatings. In this multi-component system at compositions close to its eutectic, amorphous structures can arise by virtue of the high cooling rates of melted particles. Two avenues for amorphous phase formation have been identified: in-flight and upon-impact mixing. While the crystalline structure is largely retained by unmelted or partly melted feed particles embedded in the coating, it can also be created in the solidification process. The formation of a supersaturated crystalline phase is proposed. It was found that the formation of the crystalline phases with supersaturated composition in alumina YSZ composite is possible, in spite of the high cooling rates during spray process.
Publication date
LanguageEnglish
AffiliationNRC Industrial Materials Institute; National Research Council Canada
Peer reviewedYes
NRC number54226
NPARC number18843737
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Record identifier5ec97a7c-5e76-4ca8-ba35-d3bec5f65e23
Record created2011-11-01
Record modified2016-05-09
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