Effects of Mg-Doping and of Reinforcing Multiwalled Carbon Nanotubes Content on the Structure and Properties of Hydroxyapatite Nanocomposite Ceramics

resumo

Surfactant-assisted hydrothermal synthesis of magnesium-doped hydroxyapatite (Ca10-xMgx(PO4)(6)(OH)(2)) with 0x1) was realized in aqueous solution at 90 degrees C. -TCP phase was formed in the Mg-0.6-HA sample after heat treatment at 1000 degrees C. Magnesium was found to degrade the sintering ability of Mg-x-HA ceramics. Flexural strength (sigma(f)) was found to decrease as a function of Mg-doped HA. The using of carbon nanotubes as reinforcing agents mitigated the strength loss of Mg-HA ceramics. The flexural strength of Mg-0.6-HA was then increased by nearly 20% from approximately 33 to 39MPa with an optimum addition of 3wt% of multi-walled nanotubes.

palavras-chave

MAGNESIUM-SUBSTITUTED HYDROXYAPATITE; MECHANICAL-PROPERTIES; BIOMEDICAL APPLICATIONS; COMPOSITES

categoria

Materials Science

autores

Bricha, M; Belmamouni, Y; El Mabrouk, K; Ferreira, JMF

nossos autores

agradecimentos

This work was funded through by MASCIR - Moroccan Foundation for Advanced Science, Innovation and Research. The support from CICECO is also greatly appreciated.

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