Abstract:
The factors of formation of the copper surface profile under pulsed laser exposure in an atmosphere of argon, nitrogen and an oxygen-containing atmosphere are considered. In the latter case, the effect of changing the curving direction of the surface to the opposite is demonstrated for the same sign of the temperature coefficient of the surface tension of the material. The observed convex profile is associated with partial thermal destruction of the oxide film on the melt surface in the region of maximum heating. The convex surface profile may be the reason for instability of laser technological operations with exposure to copper in an oxygen-containing environment.
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