Abstract
Biphasic calcium phosphate (BCP) was fabricated through hot pressing process from hydroxyapatite (HA) starting powder synthesized by a peroxide-based precipitation method and dried at 250?C. The synthesized HA powder contained some calcium hydrogen phosphate (CHP) as a minor phase. In this work, the dense BCP ceramics with a mixture of HA and ?-TCP phases were successfully obtained by hot pressing at temperature ranging from 700-1100?C. The amount of HA phase in the hot pressed samples decreased with increasing sintering temperature from 700 to 900?C, while the amount of ?-TCP exhibited an opposite trend. The relations between the microstructure and mechanical properties of the dense BCP ceramics sintered in the temperature range 700-1100?C were investigated. The sample hot pressed at 800?C has a dense structure with the highest hardness (4.86 ? 0.19GPa) and the lowest fracture toughness (0.80 ? 0.01MPa?m1/2). In addition, biocompatibility of apatite layer formed after immersion in simulated body fluid (SBF) for 14 days can be observed by SEM images. The results revealed that the samples hot-pressed at 800 and 900?C were covered by calcium phosphate (CaP) crystal layer indicating the strong interaction of BCP ceramics and SBF.
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.
