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

verfasst von

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.

Externe Organisation(en)

Laser Zentrum Hannover e.V. (LZH)

Typ

Artikel

Journal

Applied Physics A: Materials Science and Processing

Band

100

Seiten

203-206

Anzahl der Seiten

4

ISSN

0947-8396

Publikationsdatum

11.02.2010

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Allgemeine Chemie, Allgemeine Materialwissenschaften

Elektronische Version(en)

https://doi.org/10.1007/s00339-010-5572-9 (Zugang: Offen)