Orientation structure in transverse sections of carbon fibers from dehydrated polyvinyl alcohol
✍ Scribed by A. Shindo; Y. Sawada
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- English
- Weight
- 546 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0008-6223
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✦ Synopsis
Transverse sections of carbon fibers prepared from two different lots of dehydrated polyvinyl alcohol fibers, with and without graphitizing treatment, were observed by both polarized light and scanning electron microscopy. Several different types of transverse layer plane preferred orientation were found in the gaphitized fibers: layers aligned parallel with the section major axis in the central zone of elliptical cross sections; parallel with the fiber surface in concave regions of an irregular cross section shape; and parallel with the fiber surface in a highly crystallized fiber with an irregular cross section shape. These graphitic layer plane configurations are considered in connection with the lamellar structure in crystalline regions of the dehydrated polyvinyl alcohol fibers.