Yttria-stabilized zirconia thermal barriers sprayed using N₂-H₂ and Ar-H₂ plasmas : Influence of processing and heat treatment on coating properties

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DOIResolve DOI: http://doi.org/10.1007/s11666-007-9093-9
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TypeArticle
Journal titleJournal of Thermal Spray Technology
Volume16
Issue5-6
Pages791797; # of pages: 7
Subjectdeposition efficiency; elastic properties; in-flight particle characteristics; nitrogen-hydrogen plasmas; thermal barrier coating; thermal diffusivity; thermal treatment
AbstractThermal barrier coatings were produced using both Ar and N₂ as the primary plasma gas. Various aspects of the process and the coatings were investigated. It was found that higher in-flight particle temperatures could be produced using N₂, but particle velocities were lower. Deposition efficiencies could be increased by a factor of two by using N₂ as compared to Ar. Coatings having similar values of porosity, hardness, Young's modulus, and thermal diffusivity could be produced using the two primary gases. The coatings exhibited similar changes (increased hardness, stiffness, and thermal diffusivity) when heat-treated at 1400 °C. However, the N₂-processed coatings tended to have lower values of Young's modulus and thermal diffusivity following such treatment. The results point to the potential advantage, in terms of reduced powder consumption and increased production rate, of using N₂ as compared to Ar as the primary plasma gas for TBC deposition.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Industrial Materials Institute
Peer reviewedYes
NRC number49400
NPARC number15782943
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Record identifier0a97f975-496f-4ad5-a95f-d27f2a361f97
Record created2010-07-06
Record modified2016-05-09
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