Ablation efficiency of α-Al₂O₃ in liquid phase and ambient air by nanosecond laser irradiation

authored by

Csaba László Sajti, Ramin Sattari, Boris Chichkov, Stephan Barcikowski

Abstract

Ablation efficiency and influences of laser parameters on a material removal rate by a nanosecond laser irradiation of α-Al₂O ₃ are studied in gas and liquid phases. The laser ablation in the air yields maximum material removal rate of 12 ng/pulse using a 4.6-mJ pulse energy at 4-kHz repetition rate, compared to 88 ng/pulse in the water flow. Using a specific interpulse distance and a laser repetition rate further increase material removal rate by factor of 3 and 65, respectively, owing to an optimized lattice temperature and laser pulse interactions with the generated cavitation bubble. For the ablation in the air, these parameters do not significantly affect the ablation efficiency.

External Organisation(s)

Laser Zentrum Hannover e.V. (LZH)

Type

Article

Journal

Applied Physics A: Materials Science and Processing

Volume

100

Pages

203-206

No. of pages

4

ISSN

0947-8396

Publication date

11.02.2010

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

General Chemistry, General Materials Science

Electronic version(s)

https://doi.org/10.1007/s00339-010-5572-9 (Access: Open)