TY - JOUR
T1 - Hydrothermal synthesis of porous hydroxyapatite ceramics composed of rod-shaped particles and evaluation of their fracture behavior
AU - Murakami, Setsuaki
AU - Kato, Katsuya
AU - Enari, Yuki
AU - Kamitakahara, Masanobu
AU - Watanabe, Noriaki
AU - Ioku, Koji
N1 - Funding Information:
This research was partially supported by JSPS KAKENHI 21300175 . The authors thank Profs. K. Tohji and E.H. Ishida of Tohoku University for their honest support for measurement.
PY - 2012/3
Y1 - 2012/3
N2 - We previously reported that porous hydroxyapatite (HA) ceramics composed of rod-shaped particles exhibited high functional ability to be integrated in natural bone quickly compared to sintered HA ceramics. In addition to improved biological properties, rod-shaped particles might also provide unique mechanical properties to the HA porous ceramics. In this study, porous HA ceramics composed of rod-shaped HA particles with different aspect ratios were synthesized by a hydrothermal process, and their fracture behavior was examined by a flexural test. As the reaction temperature in the hydrothermal process decreased, the aspect ratio of the resultant particles increased and was successfully controlled from 13 to 37. Porous HA ceramics composed of rod-shaped particles with large aspect ratios exhibited non-elastic deformation in the flexural test. As the aspect ratio of the particles increased, the flexural strength and strain at fracture increased. Furthermore, the flexural strength and strain at fracture of the porous HA ceramics composed of rod-shaped particles with large aspect ratios was higher than that of sintered porous HA ceramics with a similar porosity.
AB - We previously reported that porous hydroxyapatite (HA) ceramics composed of rod-shaped particles exhibited high functional ability to be integrated in natural bone quickly compared to sintered HA ceramics. In addition to improved biological properties, rod-shaped particles might also provide unique mechanical properties to the HA porous ceramics. In this study, porous HA ceramics composed of rod-shaped HA particles with different aspect ratios were synthesized by a hydrothermal process, and their fracture behavior was examined by a flexural test. As the reaction temperature in the hydrothermal process decreased, the aspect ratio of the resultant particles increased and was successfully controlled from 13 to 37. Porous HA ceramics composed of rod-shaped particles with large aspect ratios exhibited non-elastic deformation in the flexural test. As the aspect ratio of the particles increased, the flexural strength and strain at fracture increased. Furthermore, the flexural strength and strain at fracture of the porous HA ceramics composed of rod-shaped particles with large aspect ratios was higher than that of sintered porous HA ceramics with a similar porosity.
KW - C. Mechanical properties
KW - D. Apatite
KW - E. Biomedical applications
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U2 - 10.1016/j.ceramint.2011.09.056
DO - 10.1016/j.ceramint.2011.09.056
M3 - Article
AN - SCOPUS:83555166232
SN - 0272-8842
VL - 38
SP - 1649
EP - 1654
JO - Ceramics International
JF - Ceramics International
IS - 2
ER -