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Heat Transfer Analysis of Flame-sprayed Metal-polymer Composite Structures Open Access


Other title
Heat Transfer
Thermal Spray
Type of item
Degree grantor
University of Alberta
Author or creator
Therrien, David S
Supervisor and department
Mertiny, Pierre (Mechanical Engineering)
McDonald, Andre (Mechanical Engineering)
Examining committee member and department
Kresta, Suzanne (Materials Engineering)
McDonald, Andre (Mechanical Engineering)
Mertiny, Pierre (Mechanical Engineering)
Department of Mechanical Engineering

Date accepted
Graduation date
Master of Science
Degree level
The temperature distribution of a flame-sprayed metallic layer on glass fiber-reinforced epoxy flat plates was determined experimentally, analytically, and numerically. The composite samples consisted of flat composite glass fiber-epoxy plates fabricated by filament winding, a layer of garnet sand embedded in the epoxy, with similar thermal properties to the glass fiber-epoxy layer, and a flame-sprayed aluminum-silicon (Al-12Si) coating. The use of garnet sand to promote adhesion of the metallic coating during flame spraying is novel. A second set of samples had a top layer of glass fiber wound above the coating. A resistive heating wire was attached to the coated surface at the leading edge of both sets of samples, while the polymer and coating surfaces were exposed to forced convective cooling in a wind tunnel. Thermocouples were attached to the polymer and coating to measure the transient and spatial surface temperature distributions. Both the coating and polymer surfaces experienced significant temperature increases near the heating source, with a uniform decay of the surface temperature away from the source. The surface temperature of the coating was appreciably higher than that of the polymers, away from the heating source. The use of a metallic coating to conduct heat on polymer structures is also novel, and the results indicate that the metallic coating is an effective conductor, while the polymer acts as an insulator.
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