Abstract
We measured the fracture strength and fracture toughness of ZrO 2-basedceramics containing 14.5mol%, 15.5mol%, and 16.5mol% CeO 2 at 298, 77, and 4.2K. The results indicate that there is 56–117% increase in fracture toughness at 4.2K and 47.6–92% increase in fracture strength at 4.2K. The maximum increases in fracture toughness and fracture strength from 298K to 4.2K are respect to the compositions of 16.5mol% CeO 2-ZrO 2 and 14.5mol% CeO 2-ZrO 2. The enhancement of both parameters is due to the stress-induced tetragonal to monoclinic phase transformation. The transformation reduces the stress intensity at the crack tip so as to resist crack extension. SEM analysis exhibits the differences of micrographs at various temperatures.
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.
