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Detailed Program
Paper Number : BI-O05
Time Frame : 14:43~14:55
Presentation Date : Thurse day, 27, November
Session Name : Biomaterials
Session Chair 1# : Byong Taek Lee
Session Chair 2# : Il Young Kim
Characterization of Multiwalled Carbon Nanotube-Reinforced Hydroxyapatite Composites Consolidated by Spark Plasma Sintering
Duk-Yeon Kim
Yeungnam University
The Chemistry of the human bone is similar to hydroxyapatite (HA), which is composed of both calcium and phosphate at a ratio of 1:1.67. HA has the excellent biocompatibility with living bone tissue and does not cause defensive body reactions. On the other hand, the poor mechanical properties of HA precludes its use as a replacement with load-bearing applications. Recently, the Multiwalled carbon nanotubes (MWNT) was used as the reinforcement in the ceramic matrix for enhancing the mechanical properties. The MWNT has the many good properties such as the low density, high aspect ratio and remarkable mechanical, thermal and electronic properties.
In this study, the pure HA and 1, 3, 5, 10 vol% MWNT reinforced HA were consolidated using a spark plasma sintering (SPS) technique. The decreasing of the gain size with increasing MWNT amount and pull-out toughening of the MWNT in the composites were observed which can be used to predict the improvement of the mechanical properties. Consequently, the addition of MWNT in HA increased the hardness and fracture toughness by approximately 3 ~ 4 times.



References:

[1] D. Lahiri, V. Singh, A. K. Keshri, S. Seal, and A. Agarwal, Carbon 48 (2010) p. 3103.
[2] C. F. Deng, D. Z. Wang, X. X. Zhang, and A. B. Li, Materials Science and Enginieering A444 (2007) p. 138.
[3] D. Lahiri, S. Ghosh, and A. Agarwal, Materials Science and Enginieering C32 (2012), p.1727

Acknowledgements :