Surface deformations appear in chalcogenide glasses when irradiated by scanned or pulsed electron beams accelerated at 10–30 kV. The deformation consists of a central expansion which accompanies peripheral depressions, and the scale is typically micrometer. The deformation seems to be produced by electrostatic force and electro-induced fluidity.
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Keiji Tanaka (1997) studied this question.
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