Abstract
The effect of hydrothermal degradation on the flexural strength and on the fracture statistics of 3mol% yttria-stabilized tetragonal zirconia (3Y-TZP) has been investigated. To do so, a large number (>30) of specimens were tested in four-point bending test after exposure to water vapour at 134°C and 2bar pressure for different periods of time up to 200h. The decay in mechanical strength with hydrothermal degradation material was analysed by Weibull statistics, and a strong increase in the Weibull modulus was observed (from 12 to 20). These results are discussed in terms of the thickness of the surface degraded layer, the size of natural defects in the specimens and the fracture toughness of both the tetragonal and monoclinic phases. The increase in Weibull modulus is associated with a change in the control of fracture from natural defects to the thickness of the surface degraded layer.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
