Abstract No.:
5540

 Scheduled at:
Thursday, June 08, 2017, Hall 27 9:40 AM
Suspension Spraying II


 Title:
Influence of suspension characteristics on microstructure of axial suspension plasma-sprayed coatings

 Authors:
Ashish Ganvir* / University West, Sweden
Nicolaie Markocsan / Högskolan Väst, Sweden (SWE)
Mohit Gupta/ Högskolan Väst, Sweden (SWE)
Rosa Filomena Calinas/ Innovnano, Portugal
Nuno Vitorino/ Innovnano, Portugal
Frantisek Lukac/ Institute of Plasma Physics, Czheck Republic
Johanna Ekberg/ Chalmers University of Technology, Sweden

 Abstract:
Axial Suspension Plasma Spraying (ASPS) is a relatively new thermal spaying technique to produce advanced coatings for various applications. This technique enables the production of a variety of structures from highly dense, highly porous, segmented or columnar. Previous studies have already shown that there is a significant influence of the different microstructural features on the thermal properties and the functional performance of the coatings, especially for thermal barrier coating (TBC) application. However, the influence of the different suspension characteristics on coating microstructure has not been studied in detail.
This work is an attempt to study different suspension characteristics namely type of solvent, different mean particle size (d50), and varied solid load content and their influence on the coating microstructures produced by ASPS. Surface tension, density, viscocity, microstructure and phases were analysed for various suspensions. In addition to that, the coatings were characterized to study their microstructure using advanced scanning electron microscope, phase analysis using X-ray Diffraction, and porosity analysis using image analysis.
The microstructures produced in this study are discussed in brief to reveal the influence of each suspension characteristics (mentioned above) on the coatings microstructure and hence to understand for what applications are the coatings prone to. Results show significant influence of suspension properties on coating microstructure and performance.


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