Automated Optical Microstructural Characterization of Thermal Spray Coatings

  • vsundar


    Thermally sprayed coatings are widely used to optimize surface behavior of materials in a wide variety of applications. The microstructures of these sprays are complex, and incorporate features and defects that are a result of composition and process parameters used. Porosity is a common feature of these sprayed coatings, and can affect a wide range of mechanical, thermal and electrical properties. This study extends the use of Robo-Met, an automated system for 3D materials characterization, into the realm of coatings analysis. The system collects microstructure information in an automated manner. Subsequent post processing using image analysis software can then be used to qualitatively and quantitatively analyze microstructural features and porosity. Thermal barrier coatings and coatings for abrasion resistance are both analyzed in this study. This study confirms the applicability of image analysis as a straightforward, versatile, reliable and inexpensive method for the characterization of coatings.

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vsundarAutomated Optical Microstructural Characterization of Thermal Spray Coatings