Microstructure investigation and heat treatment of nanocrystalline laser-deposited carbon fibers |
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| Authors: | C Fauteux R Longtin M Boman |
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| Institution: | a Freeform Fabrication Labs, 2900 boul. Édouard-Montpetit, Campus de l’Université de Montréal, 2500 chemin de Polytechnique, Pavillon J-A Bombardier, Montréal H3T 1J4, Canada
b Department of Materials Chemistry, Uppsala University, Box 538, 751 21 Uppsala, Sweden |
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| Abstract: | Carbon fibers were deposited by laser-assisted chemical vapor (LCVD) deposition from ethylene at sub-atmospheric pressure. Prior Raman spectroscopy analysis allowed the determination of the crystal size (average value of 3 nm in the edge region and from 8 to 113 nm in the center region). In this analysis, the microstructure of as-grown and heat treated fibers was examined using micro-Raman spectroscopy and transmission electron microscopy. The analysis revealed the degree of three-dimensional ordering of graphite planes and that the fibers were porous. |
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| Keywords: | 81 05 Uw 78 30 Jw 61 14 Lj |
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