Observation of different mass removal regimes during the laser ablation of an aluminium target in air

Year: 2008

Authors: Cristoforetti G., Legnaioli S., Palleschi V., Tognoni E., Benedetti P.A.

Autors Affiliation: CNR, Inst Chem Phys Proc, Appl Laser Spect Lab, Res Area, I-56124 Pisa, Italy

Abstract: The mass removal mechanisms occurring during the ablation of an aluminium target, induced by a Nd:YAG laser at lambda = 1064 nm in air, were investigated in the fluence range between 1.5 and 840 J cm(-2). The spectroscopic analysis of the plasma emission allowed the calculation of the plasma thermodynamic parameters and an estimation of its atomized mass. Conversely, microscopic analysis of the craters allowed the calculation of the hole volume and the quantification of the material accumulated in the rim around it, as well as a qualitative inspection of the craters profile and appearance. The trends of line intensity, of the atomized plasma mass and of the crater volumes with laser fluence suggest the identification of four laser fluence ranges, where a different role of background gas is played and different mass removal mechanisms seem to occur. A complex picture is drawn where vaporization, melt displacement, melt expulsion and phase explosion take place at different laser fluences.


Volume: 23 (11)      Pages from: 1518  to: 1528

KeyWords: Spectroscopic analysis; Lasers; Plasma emissions; Microscopic analysis; Neodymium
DOI: 10.1039/b800517f

Citations: 69
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-04-21
References taken from IsiWeb of Knowledge: (subscribers only)
Connecting to view paper tab on IsiWeb: Click here
Connecting to view citations from IsiWeb: Click here