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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/195000
- Splat taxonomy of polymeric thermal spray coating
- Alamara, Kadhim; Saber-Samandari, Saeed; Berndt, C. C.
- The geometry of a powder particle and the splat that it gives rise to during the thermal spray process are key parameters that determine the physical attributes of a coating. The splat shape is an important feature that requires accurate characterization, preferably by means of a quantified metric, so that the rapid solidification process of thermal spray deposition can be understood. In this work we report on a polypropylene (PP) powder that was sprayed onto a glass substrate at room temperature using the flame spray process, at various stand-off distances (SODs). Several statistical concepts were employed using image analysis techniques that were complemented by optical microscopy, scanning electron microscopy, and 2D profilometry: methods that measured the splat metrics of formation, including an estimate of splash area. Measurement of equivalent diameter, degree of splashing, spreading factor, deposition efficiency and circularity have quantified splats so that thermal spray parameterization can be related to the process efficiency. The results of this study indicated that increasing the SOD from 10 cm to 25 cm reduced the splat thickness and deposition efficiency; while other metrics (as listed earlier) were not routinely correlated, though an increase in splash area was demonstrated. Splat circularity was steady around 0.9, indicating that the deposited particles exhibited a circular shape at all SODs.
- Publication type
- Journal article
- Research centre
- Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Industrial Research Institute Swinburne
- Surface and Coatings Technology, Vol. 205, no. 21-22 (Aug 2011), pp. 5028-5034
- Publication year
- FOR Code(s)
- 0306 Physical Chemistry (Incl. Structural); 0912 Materials Engineering
- Polymers; Splashing; Splat metrics; Stand-off distance; Thermal spray
- Publisher URL
- Copyright © 2011 Elsevier B.V. All rights reserved.
- Peer reviewed