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Preliminary Comparison of Microwave Heating of Complex-Shaped Composites Reinforced with Conductive and Nonconductive Fibers

Published online by Cambridge University Press:  25 February 2011

Larry A. Fellows ,
Susannah Travis  and
Martin C. Hawley
Larry A. Fellows
Affiliation:
Department of Chemical Engineering, Michigan State University, East Lansing, MI 48824
Susannah Travis
Affiliation:
Department of Chemical Engineering, Michigan State University, East Lansing, MI 48824
Martin C. Hawley
Affiliation:
Department of Chemical Engineering, Michigan State University, East Lansing, MI 48824
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Abstract

The microwave heating of composites with complex shapes has been studied. A V-shaped mold was used to fabricate samples which do not lie parallel to the electric field produced in a 7-in. cylindrical microwave applicator operating at 2.45 GHz.

A polyester/glass composite and a polyester/graphite fiber composite were produced for comparison. Heating profiles were made more uniform by applying mode-switching techniques to the processing. Mode-switching is the application of more than one electromagnetic mode to achieve uniform heating.

The samples were tested for heating patterns in different geometric and fiber orientations within a single-frequency, cylindrical microwave applicator operating at 2.45 GHz. The temperature profile for each mode was recorded. Mode-switching provided better temperature profiles than single modes. Modeswitching techniques were more successful with the graphite fiber reinforcement.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 269: Symposium L – Microwave Processing of Materials III , 1992 , 415
Copyright
Copyright © Materials Research Society 1992

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References

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