Low temperature degradation of laser patterned 3Y-TZP: enhancement of resistance after thermal treatment
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The aim of this study is to characterize the resistance to low temperature degradation (LTD) of the surface of dental-grade zirconia (3Y-TZP) patterned with a Nd:YAG laser (532. nm harmonic and pulse duration of 10. ns) employing an interference setup.Laser patterning decreases the resistance to LTD of 3Y-TZP because of the presence of monoclinic phase and residual stresses, induced by the thermal shock during laser-material interaction. A thermal treatment (1. h at 1200. °C) anneals the affected microstructure and increase the resistance to LTD of laser patterned 3Y-TZP. Transformation delay may be attributed to monoclinic phase reversion, texture in the tetragonal phase and the existence of a net of shallow microcracks on the surface, accommodating autocatalytic transformation.
CitationRoitero, E., Ochoa, M., Anglada, M., Mücklich, F., Jimenez-Pique, E. Low temperature degradation of laser patterned 3Y-TZP: enhancement of resistance after thermal treatment. "Journal of the european ceramic society", Abril 2018, vol. 38, núm. 4, p. 1742-1749.
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