Ageing of dental zirconia ceramics

An in vitro study was designed to monitor the t–m transformation of biomedical grade 3Y-TZP ceramics produced from two ready-to-press granulated powders of the same nominal chemical composition, but differing in their specific surface area. Disc-shaped specimens were formed by uni-axial dry-pressing...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the European Ceramic Society 2012-08, Vol.32 (11), p.2613-2622
Main Authors: Kosmač, Tomaž, Kocjan, Andraž
Format: Article
Language:English
Subjects:
Aging
Biomedical (dental) applications
Ceramics
Corrosion (ageing)
Grain size
Monitors
Sintering (powder metallurgy)
Tetragonal zirconia polycrystals
Transformations
Yttria stabilized zirconia
ZrO2 (Y-TZP)
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:An in vitro study was designed to monitor the t–m transformation of biomedical grade 3Y-TZP ceramics produced from two ready-to-press granulated powders of the same nominal chemical composition, but differing in their specific surface area. Disc-shaped specimens were formed by uni-axial dry-pressing and sintering in air for 2h in the temperature range 1400–1550°C, resulting in a mean grain size of 0.26–0.57μm. The sintered specimens were subjected to accelerated ageing in deionized water at 134°C for up to 48h and verified in terms of the amount of the transformed monoclinic fraction, the thickness of the transformed layer, and the bi-axial flexural strength. The sintering-temperature-dependent transformability during ageing was confirmed, whereby the role of the starting-powder characteristics was more pronounced at lower sintering temperatures and was almost negligible at higher sintering temperatures.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2012.02.024