Abstract
Mixtures of hydroxyapatite and zirconia containing 3mol% Y2O3 (TZ-3 Y) or 2mol% Y2O3 (TZ-2 Y) were hot-pressed under the conditions of 1300°-1400°C, 10min and 20MPa, and the bending strength and fracture toughness of the hot-pressed bodies were measured. The reactivity between hydroxyapatite and zirconia was also examined. The zirconia content was up to 50vol%. The bending strength and fracture toughness increased with an increase in zirconia content. Properties were improved with zirconia (TZ-2 Y) than with zirconia (TZ-3 Y). Compacts containing 50vol% zirconia (TZ-2 Y) fired at 1400°C showed the highest mechanical properties: bending strength; about 400MPa and fracture toughnees; about 3.0MPa·m1/2. These values were two or three times as large as those of hydroxyapatite single compacts. The following two thermal transformations were observed in the present system: (i) decomposition of hydroxyapatite to α-tricalcium phosphate and (ii) transition of tetragonal zirconia to cubic phase.
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.
