CUED Publications database

Investigation of pulse shape characteristics on the laser ablation dynamics of TiN coatings in the ns regime

Demir, AG and Pangovski, K and O'Neill, W and Previtali, B (2015) Investigation of pulse shape characteristics on the laser ablation dynamics of TiN coatings in the ns regime. Journal of Physics D: Applied Physics, 48. ISSN 0022-3727

Full text not available from this repository.

Abstract

© 2015 IOP Publishing Ltd. In this work, the ablation dynamics of TiN coating with a ns-pulsed fibre laser in a wide range of pulse durations were studied. Critical time instances within the pulse duration were assessed by reflected pulse analysis. Digital holography was employed to investigate the shock wave expansion dynamics within and beyond the pulse duration. The results depict that the absorption behaviour changes as a function of the pulse rise time. Moreover, planar expansion of the shock wave is observed, which is generally linked to higher machining quality and absence of excessive plasma. The results of the study are interpreted to depict the required characteristics of optimized pulse shapes in the ns-region for improved micromachining performance.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div E > Production Processes
Div E > Manufacturing Systems
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 18:57
Last Modified: 12 Oct 2017 01:49
DOI: