Development of Triphasic Calcium Phosphate–Carbon Nanotubes (HA/TCP-CNT) Composite: A Preliminary Study

Abstract:

Triphasic calcium phosphate, composed of a more stable phase hydroxyapatite (HA) and highly soluble tricalcium phosphates (α- and β-TCP) has been synthesized through hydrothermal method. In the present work, an in-situ method to disperse 1wt% multiwall carbon nanotubes (MWCNTs) within HA/TCP powder has been used in order to develop HA/TCP-CNTs composite. XRD results confirmed the formation of HA, α-TCP and β-TCP in both as-prepared powder and composite samples. The graphite peaks appeared in the composite samples as well. FTIR analysis of sintered compacted powder showed the formation of weak bands of PO₄^3- as the temperature was increased. The sintered compacts were mechanically tested by Vickers microhardness indentation method. HA/TCP-CNTs composite was found to have a significant of Vickers Hardness of 1.98 GPa after 1100°C sintering. The morphology analysis showed that in-situ deposition technique provides homogeneous dispersion of CNTs in the calcium phosphate matrix.

• Periodical: Key Engineering Materials (Volumes 531-532)
• Pages: 258-261
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.531-532.258
• Online since: December 2012
• Authors: Gunawan Gunawan, Iis Sopyan, S. Nurfaezah, M. ‘Ammar
• Keywords: Carbon Nanotube (CN), Hydrothermal Method, Hydroxyapatite (HAP), α-TCP, β-TCP

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