Mathematics – Logic
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5578..632m&link_type=abstract
Photonics North 2004: Optical Components and Devices. Edited by Armitage, John C.; Fafard, Simon; Lessard, Roger A.; Lampropoul
Mathematics
Logic
Scientific paper
The analysis of entrapped debris provides a useful complementary method of investigating the laser ablation mechanism in laser processing of polycrystalline metal samples, in this case stainless steel, using a femtosecond laser (Clark MXR, CPA2001). Morphological investigations of the laser processed areas, for a range of laser fluences and pulse number, were recorded using optical and scanning electron microscopies (SEM) and white light interferometry. Data obtained on ablation rates, ejected particle sizes, and crater morphologies show that ablation changes from a smooth to an explosive process at high fluences, as identified with changes in the material removal mechanisms. In this paper, additional insight is derived from the analysis of the debris generated for metal samples, which can be attributed to laser ablation mechanisms based on vaporization, spallation, phase explosion, and fragmentation.
Coyne Edward
Glynn Thomas J.
Howard Helen
Mannion Paul T.
O'Connor Gerard M.
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