TY - JOUR
T1 - β -Rhenanite ( β -NaCaPO4) as Weak Interphase for Hydroxyapatite Ceramics
AU - Suchanek, Wojciech
AU - Yashima, Masatomo
AU - Kakihana, Masato
AU - Yoshimura, Masahiro
N1 - Funding Information:
This research was supported by the `Research for the Future' Program No. 96R06901 of the Japanese Society for the Promotion of Science (JSPS). We are very grateful to Mr. H. Ishizawa and Mr. M. Ogino (Nikon Co. Ltd, Sagamihara, Japan) for providing the bioactive glass powder, Professor E. Yasuda for granting us permission to use his hot press, Mr. T. Akatsu for experimental assistance, Professor Z. Nakagawa, Dr. N. Enomoto, and Mr. B. Sakurai (all Tokyo Institute of Technology, Yokohama, Japan) for help during SEM investigations.
PY - 1998/11
Y1 - 1998/11
N2 - Hydroxyapatite/bioactive glass laminate has been fabricated by hot pressing of stacked hydroxyapatite and bioactive glass powders at 1000°C (30min, 30MPa). This processing resulted in the formation of β-NaCaPO4 (β-rhenanite) interphase layers between each hydroxyapatite and bioactive glass layer. The β-NaCaPO4 interphase provided an easy path for debonding and crack deflection in the laminate demonstrating that this material can work as weak interphase in hydroxyapatite ceramics. The β-NaCaPO4 exhibits also high biocompatibility and bioactivity. Moreover, it significantly enhances sinterability of hydroxyapatite at 1000°C without formation of any undesired phases, such as tricalcium phosphate or CaO. Our results show that various microstructurally controlled hydroxyapatite-based composites with potentially improved reliability and high biocompatibility can be prepared in the hydroxyapatite/β-NaCaPO4 or hydroxyapatite/bioactive glass systems.
AB - Hydroxyapatite/bioactive glass laminate has been fabricated by hot pressing of stacked hydroxyapatite and bioactive glass powders at 1000°C (30min, 30MPa). This processing resulted in the formation of β-NaCaPO4 (β-rhenanite) interphase layers between each hydroxyapatite and bioactive glass layer. The β-NaCaPO4 interphase provided an easy path for debonding and crack deflection in the laminate demonstrating that this material can work as weak interphase in hydroxyapatite ceramics. The β-NaCaPO4 exhibits also high biocompatibility and bioactivity. Moreover, it significantly enhances sinterability of hydroxyapatite at 1000°C without formation of any undesired phases, such as tricalcium phosphate or CaO. Our results show that various microstructurally controlled hydroxyapatite-based composites with potentially improved reliability and high biocompatibility can be prepared in the hydroxyapatite/β-NaCaPO4 or hydroxyapatite/bioactive glass systems.
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U2 - 10.1016/S0955-2219(98)00131-9
DO - 10.1016/S0955-2219(98)00131-9
M3 - Article
AN - SCOPUS:0006754402
SN - 0955-2219
VL - 18
SP - 1923
EP - 1929
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 13
ER -