Correlation of Plasma Sprayed Coating Deposition Efficiency with Volume Flux Measurements by Phase Doppler Anemometry (PDA) |
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Authors: | P Wang S C M Yu H W Ng |
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Institution: | (1) Thermal & Fluids Engineering Division, School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, 639798, Singapore;(2) Applied Mechanics Division, School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, 639798, Singapore |
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Abstract: | The use of phase-Doppler anemometry (PDA) to characterize the detail in-flight plasma sprayed particle behavior has been demonstrated
previously Ma et al. Plasma Chem Plasma Process 24(1):85; 25(1):56] The present articles shows further that a direct relationship
may exist between the PDA measured particle volume flux and the coating microstructure and deposition efficiency (DE). In
the situation when the precise particle temperature information is not available, the PDA measured particle volume flux may
provide an alternative to predict quantitatively the variation of the coating microstructure and the DE. By monitoring the
in-flight particle volume flux variations, instead of the particle velocity, size and temperature individually and simultaneously,
the optimal settings of the plasma spraying parameters may also be determined conveniently. However, it is noted that the
effective applications of such approach depend largely on the particle surface morphology and the pre-determination of the
particle size range. |
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Keywords: | PDA Volume flux |
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