Laser scribing of alumina ceramics by Nd:YAG and ytterbium fiber laser

0483136 - FZÚ 2018 DE eng A - Abstract
Řiháková, L. - Chmelíčková, Hana
Laser scribing of alumina ceramics by Nd:YAG and ytterbium fiber laser.
Lasers in Manufacturing (LiM). Book of Abstracts. Munich: WLT, 2017 - (Overmeyer, L.; Reisgen, U.; Ostendorf, A.; Schmidt, M.)
[LiM 2017. Lasers in Manufacturing Conference. 26.06.2017-29.06.2017, Munich]
Institutional support: RVO:68378271
Keywords : alumina ceramics * laser scribing * groove characteristics
OECD category: Materials engineering

This paper focuses on laser scribing of alumina ceramics as they are hard to machine by conventional methods due to their high hardness and brittleness. Scribing is very promising method of separation based on making a groove, either fully penetrated or not. The scribed line creates a stress concentration and weakens the structure thus enabling easy breakage of the material along the line using mechanical force. Scribing process and the depth of penetration depend on laser parameters, laser beam diameter and its quality. The quality of the process is ensured by the less amount of debris and heat affected zone and no evidence of cracking. In this paper laser scribing of alumina ceramics using Nd:YAG and quasi-continuous-wave fiber laser was investigated in dependence on pulse length, pulse energy, pulse frequency, peak power and number of crossings.
Permanent Link: http://hdl.handle.net/11104/0278540