Effect of thermal spikes on the structural characteristics of Kevlar fibres

Iyer, RV and Vijayan, Kalyani (2000) Effect of thermal spikes on the structural characteristics of Kevlar fibres. Journal of Materials Science, 35 (22). pp. 5731-5739. ISSN 0022-2461

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Official URL: http://www.springerlink.com/content/1573-4803/


The effect of up to six cumulative exposures to thermal spikes, each of 10 s duration, on Kevlar 49 fibers has been analyzed. X-ray data show that exposures to spikes corresponding to T's not less than 400 C cause changes at the level of the crystal lattice. At and above 500 C, severe surface damages such as introduction of longitudinal openings, peel-offs and extraneous material are found to occur. The tensile properties of the spike-exposed fibers manifest changes which conform well with the structural changes. As in the case of prolonged thermal exposures, the spike-induced effects are also controlled by two parameters, viz., the temperature and the duration of the cumulative exposure. The data from spike exposed fibers indicate that the thermally induced changes in the structural and tensile characteristics get initiated at the very early stages of thermal exposure viz., of the order of 10 s.

Item Type: Article
Additional Information: Copyright for this article belongs to Kluwer Academic Publishers
Uncontrolled Keywords: Kelver;Temperature effects;Fibers;Crystal lattices;Surface properties;Tensile strength
Subjects: CHEMISTRY AND MATERIALS > Composite Materials
Depositing User: M/S ICAST NAL
Date Deposited: 18 Oct 2006
Last Modified: 24 May 2010 04:20
URI: http://nal-ir.nal.res.in/id/eprint/2648

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