Teflon plate is irradiated by pulsed CO/sub 2/ laser. A crater with even edges without traces of melt or blackening was formed after irradiation of the teflon plate surface by focussed pulsed radiation of CO/sub 2/-laser with p.r.r. of /spl sim/1 Hz. Increasing of PTFE surface temperature resulted in increase of efficiency of teflon mass removed from the crater. Increasing of teflon target surface temperature or laser pulse duration results in greater amount of PTFE mass sputtered per shot, increase in particle sizes and appearance of fiber-like formations. Teflon sputtering velocities and powder particles distribution by size at pulse duration of 100 ns and 15 /spl mu/s and specific power of 10/sup 8/ and 10/sup 6/ W/cm/sup 2/, correspondingly, have been define.
Teflon sputtering under pulsed CO/sub 2/-laser irradiation
2003-01-01
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Conference paper
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