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| Abstract No.: |
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Scheduled at:
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Wednesday, June 07, 2017, Hall Y 4:20 PM
Session Young Professionals
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| Title: |
Characterization of scattering for particle size measurement in plasma spray
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| Authors: |
Ali Akbarnozari* / Concordia University, Canada
Shahin Amiri/ Concordia University, Canada
Ali Dolatabadi/ Concordia University, Canada
Christian Moreau/ Concordia University, Canada
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| Abstract: |
Characterization of the in-flight particles becomes more and more demanding for complex coating processes such as suspension plasma spray (SPS) and high velocity suspension flame spray (HVSFS). However, the harsh coating environment impedes using common characterization methods provided by available diagnostic systems. This study focuses on applying a light diffraction-based diagnostic system to measure the size of the in-flight particles under real coating conditions. For this purpose, particles with a well-defined size distribution were used in order to validate the experimental results. The particle size was calculated by measuring the intensity of the collected scattering light. The plasma radiation was found to be the dominant source of noise in this investigation. This noise was partially eliminated using optical filtration windows. Since the complete elimination of the plasma noise was not practical, it was tried to maximize the signal to noise ratio (SNR) by optimizing the spray conditions and modification of the test setup. Furthermore, the measured scattering signal was compared to the theoretical scattering intensity, which showed a very good agreement. This study provided the necessary considerations for online size measurement of in-flight particles.
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