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

  • Author / Creator
    Therrien, David S
  • 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.

  • Subjects / Keywords
  • Graduation date
    Spring 2013
  • Type of Item
  • Degree
    Master of Science
  • DOI
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.