Skip to main content
padlock icon - secure page this page is secure

Raman Spectroscopy Evaluation of Subsurface Hydrothermal Degradation of Zirconia

Buy Article:

$52.00 + tax (Refund Policy)

The aims of this study were to calibrate the collection depth for RMS and, using the calibration, to evaluate the in‐depth phase transformation induced in a dental 3YTZP ceramic by hydrothermal aging, simulating LTD. Objectives 10x and 80x affording spatial resolutions of ~3 and ~1 μm, respectively, were used. Probe size was controlled by the confocal pinhole aperture. The collection depth of each probe (objective – pinhole combination) was calibrated on a wedge‐shaped pure tetragonal zirconia specimen. Pure tetragonal samples of a dental 3YTZP were aged in vitro in an autoclave, in Ringer solution, at 130°C, under 0.6 MPa, for 10, 15, 20, 25, and 90 h. Two specimens were used for each time interval and two unexposed specimens served as controls. Monoclinic volume fraction (V fm) was determined by X‐ray diffraction and by in‐depth probing with RCMS. Probes based on 10x objective penetrated up to 68 μm, whereas those based on the 80x were limited to 5 μm. Aging induced significant increase in V fm, ranging from 30% after 10 h to 80% after 90 h. After 90 h aging, the 80% V fm extended to at least 20 μm from the surface. A maximum V fm was identified at 2.5 μm subsurface depth in 10, 15, and 20 h aged specimens.
No References
No Citations
No Supplementary Data
No Article Media
No Metrics

Document Type: Research Article

Publication date: July 1, 2012

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more