Abstract
The response to electron bombardment of highly stressed Kapton-HTM, TeflonTM (polytetrafluoroethylene), and linear high-density polyethylene is investigated. Evidence is presented for electron induced crack initiation and crack growth. Calculations show that the electron exposures used in these experiments are sufficiently small that thermal heating of the zone near the crack tip does not dominate. Video recording of the shape of the crack before and during bombardment is presented as well as scanning electron microscopy analysis of the bombarded regions of the specimens. Instabilities in the form of microcracks appear to be the dominant consequence of electron bombardment of stressed materials. The role of highly localized electronic excitations of stressed molecular bonds is also discussed.
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Schedule a callMore From: Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films
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