Abstract
Multi-walled carbon nanotubes (MWCNTs)/hydroxyapatite (HAp) biocomposites reinforced by lead zirconate titanate (PZT) or lithium niobate (LiNbO3) were prepared at 950 °C by hot pressing. The mechanical test results show that the MWCNTs/LiNbO3/HAp (CLH) composite has excellent flexural strength and fracture toughness, about 44 and 110% increase as compared with those of the MWCNTs/HAp (CH) composite. However, dense MWCNTs/PZT/HAp (CPH) composite could not be prepared due to serious evaporation of Pb. Based on in-depth observation of microstructure by field-emission scanning electron microscopy, the toughening mechanism in the CLH composite was discussed.
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