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Formation of Foamy Coatings by Laser Ablation of Glass-ceramic Substrates in the Nanosecond Regime Substrate - Temperature and Wavelength Dependence

Published online by Cambridge University Press:  29 July 2011

Daniel Sola ,
Andrés Escartín  and
Jose I. Peña
Daniel Sola
Affiliation:
Centro de Física de Materiales, Universidad del País Vasco-CSIC, Departamento de Física Aplicada I, Alda. de Urquijo s/n, 48.013 Bilbao, Spain
Andrés Escartín
Affiliation:
Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, Departamento de Ciencia y Tecnología de Materiales y Fluidos, C/ María de Luna, 3, 50.018 Zaragoza, Spain
Jose I. Peña
Affiliation:
Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, Departamento de Ciencia y Tecnología de Materiales y Fluidos, C/ María de Luna, 3, 50.018 Zaragoza, Spain
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Abstract

A study of the formation mechanisms of foamy coatings on the surface of glass-ceramic substrates produced by laser ablation is presented. Three laser systems emitting at 1064, 532 and 355 nm with pulse-widths in the nanosecond range were used. In the NIR range the formation of the coating is only possible when the temperature of the surface is higher than 300 ºC. In this case, the generation is related to an increase of the layer in liquid-phase produced in the interaction zone. However, when the sample is machined at 532 or 355 nm, it is not necessary to heat the whole surface to be processed. In this case, the local temperature and the pressure exerted over the interaction zone produce the generation of this coating, obtaining the layer at room temperature. Furthermore, the coating can be produced at higher speeds. In this way, it is possible to reduce the energetic cost improving the efficiency of the process.

Morphology, microstructure, composition and thermal properties of the layer are described.

Keywords

laser ablationcoatingthermal conductivity
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1365: Symposium TT – Laser-Material Interactions at Micro/Nanoscales , 2011 , mrss11-1365-tt03-07
Copyright
Copyright © Materials Research Society 2011

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