Research on microcracks avoidance in processing of α-Al2O3 by ultrashort laser pulses

Cheng-Wei Wang; Quan-Zhong Zhao

doi:10.1117/12.2020373

9 July 2013 Research on microcracks avoidance in processing of α-Al₂O₃ by ultrashort laser pulses

Cheng-Wei Wang, Quan-Zhong Zhao

Proceedings Volume 8786, Pacific Rim Laser Damage 2013: Optical Materials for High Power Lasers; 878623 (2013) https://doi.org/10.1117/12.2020373
Event: SPIE/SIOM Pacific Rim Laser Damage: Optical Materials for High-Power Lasers, 2013, Shanghai, China

Abstract

The optical crystal α-Al₂O₃ has been widely used as the matrix of ruby and blue sapphire for its wide transparency, high thermal conductivity, big scale and low cost. α-Al₂O₃ is so hard that cutter is easily abraded. Micromachining of α-Al₂O₃ by ultrashort pulsed laser is superior to the traditional mechanical approach as its non-contact and cold machining features. However, unexpected cracks on the surface of α-Al₂O₃ are observed after femtosecond laser machining. In order to hinder the crack source from stretching, we optimize the laser parameters accompanied with annealing. The crack-free machining can be achieved. Three-dimensional α-Al₂O₃ microstructures free from fracture, such as cylinder, barrel and sphere are demonstrated.

Citation Download Citation

Cheng-Wei Wang and Quan-Zhong Zhao "Research on microcracks avoidance in processing of α-Al₂O₃ by ultrashort laser pulses", Proc. SPIE 8786, Pacific Rim Laser Damage 2013: Optical Materials for High Power Lasers, 878623 (9 July 2013); https://doi.org/10.1117/12.2020373

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available