Determination of surface tension coefficient of liquid metals and alloys using the phenomenon of capillary wave formation

A possibility of determining the surface tension coefficient of 6H13 liquid steel and of technically pure iron (ArmcoFe) has been presented. In the investigation the phenomenon of ring structure formation (capillary waves) on the surface of a molten metal affected by light pulses of a glass neodymium laser (λ = 1,06 μm, τ_i ≈ 1 ms, E_i ≈ 6J) has been considered. The values obtained for the surface tension coefficient are in good agreement with those determined by other methods (for liquid metals in the temperature range 2000K – 5000K).