Confocal Raman microscopic analysis of the zirconia/feldspathic ceramic interface

Effect of differences in coefficient of thermal expansion of veneer and Y-TZP ceramics on interface phase transformation

“…The observation of this transformation for the nonfractured veneered copings can be explained by the diffusion of the veneer into the surface of zirconia during the firing processes, which results in a high stress concentration at the veneer-framework interface. Durand et al 39,40 confirms this suggestion. In the case of nonfractured veneered copings, the temperature gradient factor is excluded.…”

Low-Fusing Porcelain Glaze Application on 3Y-TZP Surfaces can Enhance Zirconia-Porcelain Adhesion

“…This can be explained by the interdiffusion of glass on zirconia before veneering porcelain as shown in Raman spectra where some chemical elements such as silicon, sodium, aluminum and potassium diffused in the zirconium dioxide layer. This is possible because of defects in the crystalline solid (20).…”

Biological and Structural Characterization of Y-TZP for Implant Abutments

“…The current study identified five wave numbers of the peaks (~260, 320, 464, 642 and 147 cm -1 ) similar to the frequencies of vibration corresponded to the six Raman active bands of the tetragonal Y-TZP [15] (Figure 4). According to some studies it is possible to identify the three main phases (monoclinic, tetragonal and cubic) because they exhibits changes in the zirconium oxide bond angles and lengths, indicating the phase transformation [15,19,22]. The main broad bands shown in our study were at ~260, 464, and 642 cm −1 (Figure 4).…”

“…The main broad bands shown in our study were at ~260, 464, and 642 cm −1 (Figure 4). They are due to tetragonal or cubic phases [15]. Different chemical stabilizers and crystal size probably caused few spectral variations at the tetragonal/cubic phases of this study (~260, 464, and 642 cm -1 ) [22,23] (Figure 4).…”

“…A highly localized stress on the zirconia surface results in a phase transformation from tetragonal into monoclinic or cubic forms [14,15]. The cracks dissipation is limited by this crystalline forms change, decreasing the risk of ions release from the bulk of the material.…”