caa a22 4500 463234022 CHVBK 20180405153251.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s10853-006-0485-x doi (NATIONALLICENCE)springer-10.1007/s10853-006-0485-x Effect of MgF2 on hot pressed hydroxylapatite and monoclinic zirconia composites [Elektronische Daten] [Zafer Evis, Robert Doremus] Hydroxylapatite (HA) has been widely used in biomedical applications because of its excellent biocompatibility in the human body. A total of 25wt% monoclinic (m) zirconia-HA composites (with and without 5wt% MgF2) were synthesized to investigate their mechanical properties and phase stability. In HA-m-ZrO2 composites, HA and m-ZrO2 reacted to form CaZrO3 when there was no F− present in the composite and m-ZrO2 partially transformed to tetragonal ZrO2. When MgF2 was added into the system, it improved the thermal stability of the phases, densification, hardness, and fracture toughness of the composites and it caused the m-ZrO2 to transform completely to t-ZrO2 by incorporating the Mg2+ ions present in MgF2 in the ZrO2. Moreover, the stability of HA was improved by incorporating the F− ions from MgF2 in place of OH− ions in HA. Substitution of OH− by F− ions was verified by the change in HA's hexagonal lattice parameters. A fracture toughness of 2.0MPa√m was calculated for the composite containing MgF2. Springer Science+Business Media, LLC, 2007 Evis Zafer Engineering Sciences, Middle East Technical University, 06531, Ankara, Turkey aut Doremus Robert Materials Science and Engineering, Rensselaer Polytechnic Institute, 8th street, 12180, Troy, NY, USA aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/11(2007-06-01), 3739-3744 0022-2461 42:11<3739 2007 42 10853 https://doi.org/10.1007/s10853-006-0485-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0485-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Evis Zafer Engineering Sciences, Middle East Technical University, 06531, Ankara, Turkey aut NATIONALLICENCE 700 1- Doremus Robert Materials Science and Engineering, Rensselaer Polytechnic Institute, 8th street, 12180, Troy, NY, USA aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/11(2007-06-01), 3739-3744 0022-2461 42:11<3739 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer