300 fs pulsed laser ablation of Al2O3 ceramic and introduction of a predictive model

• Main Authors: Wegener, K. (Author), Weixler, J. (Author), Zweifel, M. (Author)
• Format: Article
• Language: English
• Published: Elsevier Ltd 2022
• Subjects: Alumina; Aluminum oxide; Angle of Incidence; Laser ablation; Laser ablation of al2O2 ceramic; Laser ablation of Al2O2 ceramic; Laser process; Lasers ablations; Learning algorithms; Machine learning; Neuenschwander model; Predictive calculation routine; Predictive models; Pulse durations; Pulsed lasers; Surface pulse; Threshold fluences; Topography
• Online Access: View Fulltext in Publisher
• ISBN: 02641275 (ISSN)
• DOI: 10.1016/j.matdes.2022.110614

In this study a calculation routine for predicting the ablation topography considering the angle of incidence and the evolution of the ablated surface pulse by pulse is presented and applied. Laser processing of Al2O3 ceramic is studied by the ablation of single craters as well as by macroscopic ablation pockets for a pulse duration of 300 fs at a wavelength of 515 nm. The threshold fluence is determined and compared for different process configurations and it is demonstrated that lower scanspeed leads to a higher removal rate. The accuracy of this method is evaluated in an ablation experiment. The presented method is useful for predicting the surface topography in order to optimize the scanpath or to apply machine learning algorithms. © 2022 The Author(s)