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TECHNICAL PAPERS: Heat Transfer in Manufacturing

Simulation of Thermal Plasma Spraying of Partially Molten Ceramics: Effect of Carrier Gas on Particle Deposition and Phase Change Phenomena

[+] Author and Article Information
I. Ahmed, T. L. Bergman

Department of Mechanical Engineering, Wichita State University, 1845 Faimount, Wichita, KS 67260-0133e-mail: tberg@engr.uconn.edu Department of Mechanical Engineering, The University of Connecticut, 191 Auditorium Road, Storrs, CT 06269-3139e-mail: tberg@engr.uconn.edu

J. Heat Transfer 123(1), 188-196 (Sep 27, 2000) (9 pages) doi:10.1115/1.1338117 History: Received February 17, 2000; Revised September 27, 2000
Copyright © 2001 by ASME
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References

Figures

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A schematic representation of the thermal plasma spraying system along with the injection port and substrate
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Temperature distributions for the plasma jet without carrier gas injection (side view)
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Temperature distributions for the plasma jet with carrier gas injection (a) side view (b) top view with Vcg=5 m/s; (c) side view; and (d) top view with Vcg=15 m/s.
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Deposition locations for (a) 30 μm, (b) 50 μm, and (c) 70 μm particles with no carrier gas injection
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Phase change inside a 50 μm particle (no carrier gas). The vertical lines mark the solid-liquid interface with n being nanostructured material, l being molten material, and s being resolidified material.
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Evolution of fL and fRN for 50 μm particles with no carrier gas injection
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Average fRN and fm for particles deposited at different (a) horizontal and (b) vertical distances from the centerline (no carrier gas)
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Deposition locations for (a) 30 μm, (b) 50 μm, and (c) 70 μm particles with Vcg=15 m/s
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Evolution of fL and fRN for 50 μm particles with Vcg=15 m/s
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Average fRN and fm for particles deposited at different (a) horizontal and (b) vertical distances from the centerline (Vcg=15 m/s)
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Deposition locations for (a) 30 μm, (b) 50 μm, and (c) 70 μm particles with Vcg=5 m/s
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Evolution of fL and fRN for 50 μm particles with Vcg=5 m/s
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Average fRN and fm for particles deposited at different (a) horizontal and (b) vertical distances from the centerline (Vcg=5 m/s)
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Comparison of predicted and measured centerline temperatures

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