Application of Micro-Raman Spectroscopy to the Study of Yttria-Stabilized Tetragonal Zirconia Polycrystal (Y-TZP) Phase Transformation

The aim of this study was to perform micro-Raman spectroscopy as an alternative and nondestructive method to identify the phase transformation of zirconia after mechanical stress. The groups evaluated were experimental zirconia, zirconcad, IPS e.max ZirCad, and In Ceram YZ. Ten specimens were constr...

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Bibliographic Details
Published in:Applied spectroscopy 2015-07, Vol.69 (7), p.810-814
Main Authors: Ramos, Carla Müller, Tabata, Américo Sheitiro, Cesar, Paulo Francisco, Rubo, José Henrique, Fracisconi, Paulo Afonso Silveira, Borges, Ana Flavia Sanches
Format: Article
Language:English
Subjects:
Crystallization
Phase Transition
Spectrum Analysis, Raman
Stress, Mechanical
Yttrium - chemistry
Zirconium - chemistry
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Summary:The aim of this study was to perform micro-Raman spectroscopy as an alternative and nondestructive method to identify the phase transformation of zirconia after mechanical stress. The groups evaluated were experimental zirconia, zirconcad, IPS e.max ZirCad, and In Ceram YZ. Ten specimens were constructed for each group (n 30) and subjected to a three-point bending test with a crosshead speed of 0.5 mm/min. The fractured surfaces were analyzed by micro-Raman spectroscopy. The laser power was kept at 10 mW, and scanning was performed in three regions of the fractured surface: (i) near the source of the failure (region of tensile stress), (ii) central to the fractured surface, and (iii) far from the source of failure. All materials showed the characteristic bands of tetragonal and monoclinic phases of zirconia. All zirconia studied showed a monoclinic phase in the tensile stress region. Micro-Raman spectroscopy was effective in detecting the presence of crystalline phases in polycrystals ceramics.
ISSN:0003-7028
1943-3530
DOI:10.1366/14-07793