Enhancing the Photoluminescence and Microstructural Transformations of Al₂O₃/Glass–Ceramic Composite Coatings by Laser Irradiation

Abstract

This work presents an analysis of the crystallization process and the influence of laser surface modification on the crystalline phases and optical responses of Al2O3/glass–ceramic coatings deposited on a brass substrate. We used a CO2 laser at different irradiation powers to change the structure of the superficial layer. The photoluminescence response enhanced the resolution of its line shape as the irradiation power increased. X-ray diffraction patterns exhibit the presence of different crystalline phases for the samples irradiated.

Keywords

• sol–gel method
• alumina
• laser surface modification
• silica-stabilized zirconia glass-ceramics