Shubha, M and Vijayan, Kalyani (1989) X-ray analysis of heat-treated KEVLAR fibres. Technical Report. National Aeronautical Laboratory, Bangalore, India.
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Abstract
KEVLAR fibres heat-treated at 350xB0;C and 500xB0;C for various13; residence time intervals have been characterized by X-ray methods. At both 350xB0;C and 500xB0;C, heat treatment increases the inter-layer distance in the crystal structure. Pronounced misalignment of crystallites is found to occur. The crystallinity of the fibres exhibit an increase with one hour of exposure to 350xB0;C. Exposure to 50QxB0;C, however, decreases the crystallinity by 40 %. Indications of growth in crystallites and/or reduction in defects are observed. Changes in the relative intensities of reflections have also been found to occur.
| Item Type: | Monograph (Technical Report) |
|---|---|
| Uncontrolled Keywords: | KEVLAR;Heat-treatment;X-ray diffraction |
| Subjects: | CHEMISTRY AND MATERIALS > Composite Materials |
| Depositing User: | Mr. Ravikumar R |
| Date Deposited: | 02 Nov 2006 |
| Last Modified: | 24 May 2010 04:22 |
| URI: | http://nal-ir.nal.res.in/id/eprint/3256 |
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