Nanosecond-laser patterning of 3Y-TZP: Damage and microstructural changes. Issue 15 (December 2017)

• Record Type: Journal Article
• Authors: Roitero, E.; Lasserre, F.; Roa, J.J.; Anglada, M.; Mücklich, F.; Jiménez-Piqué, E.
• Is Part Of: Journal of the European Ceramic Society. Volume 37:Issue 15(2017)
• Page Start: 4876
• Page End: 4887
• Publication Date: 2017-12
• Subjects: Laser treatment -- 3Y-TZP -- Martensitic phase transformation -- Direct laser interference patterning; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2017.05.052
• Languages: English
• ISSNs: 0955-2219

Abstract

Graphical abstract: Abstract: The aim of this study is to characterize in detail the microstructural changes and collateral damage induced by direct laser patterning on the surface of dental-grade zirconia (3Y-TZP) employing an interference setup with the 532 and 355 nm harmonics of a Nd:YAG laser (pulse duration of 10 ns). Laser-material interaction mainly results in thermal effects for both wavelengths studied. Upon laser irradiation the material locally melts producing pattern and establishing a steep thermal gradient on the surface. This generates a ∼ 1 μm thick heat affected zone where microcracking, directional recrystallization, phase transformation (from tetragonal to monoclinic, t → m ) and texturization (ferroelastic domain switching) take place. In addition, surface coloration results from the activation of F -centers as a consequence of high energy radiation exposure. No chemical segregation or diffusion was detected. All these microstructural changes should be taken into account to ensure integrity and long-term reliability of the zirconia components.