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

摘要

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 nanotubesud(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-preparedudpowder 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 Vickersudmicrohardness indentation method. HA/TCP-CNTs composite was found to have a significant of Vickers Hardness of 1.98 GPa after 1100oC sintering. The morphology analysis showed that in-situ deposition technique provides homogeneous dispersion of CNTs in the calcium phosphate matrix