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.
Highlights
Alumina ceramics have found, for a long time, several important technological applications in optical [1] and microelectronic components [2] as protective, decorative, wear-resistant, solid-state device applications [3,4] and anticorrosion coatings [5,6,7], due to their chemical inertness, good mechanical strength and high hardness, transparency and good insulating properties [8].In particular, high-temperature applications represent a new challenge for alumina ceramic joints in many fields [9], especially for complex-shaped alumina ceramic components
This paper reports the spectroscopic properties of the Al2 O3 /SiO2 -ZrO2 glass–ceramic filler on the brass substrate, where the laser surface modification causes a phase transformation
We report the crystallization and the influence of laser surface modification on the crystalline phases and optical response of Al2 O3 /glass–ceramic coatings
Summary
For a long time, several important technological applications in optical [1] and microelectronic components [2] as protective, decorative, wear-resistant, solid-state device applications [3,4] and anticorrosion coatings [5,6,7], due to their chemical inertness, good mechanical strength and high hardness, transparency and good insulating properties [8].In particular, high-temperature applications represent a new challenge for alumina ceramic joints in many fields [9], especially for complex-shaped alumina ceramic components. It has been found that joining ceramics to themselves, or to metals, can be achieved by direct solid-state diffusion [10], joining with metallic interlayers [11] and joining using glass or glass–ceramic interlayers [9,12,13]. These processes depend on solid-state diffusion and the interface that is formed at high pressures and high temperatures. Some problems reported are the low resistance to oxidation at high temperatures, in addition to relatively long processing times at high temperatures to ensure sufficient mutual diffusion
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