Título:
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Nanosecond-laser patterning of 3Y-TZP: damage and microstructural changes
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Autor/a:
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Roitero, Erica; Lasserre, F.; Roa Rovira, Joan Josep; Anglada Gomila, Marcos Juan; Mücklich, F.; Jiménez Piqué, Emilio
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Otros autores:
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Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural, Micromecànica i Fiabilitat dels Materials |
Abstract:
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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. |
Materia(s):
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-Àrees temàtiques de la UPC::Enginyeria dels materials -Martensitic transformations -3Y-TZP -Direct laser interference patterning -Laser treatment -Martensitic phase transformation -Transformacions martensítiques |
Derechos:
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Tipo de documento:
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Artículo - Borrador Artículo |
Editor:
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Elsevier
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