Sintering and Mechanical Properties of Magnesium and Fluorine Co-Substituted Hydroxyapatites - Journal of Biomaterials and Nanobiotechnology

JBNB > Vol.4 No.1, January 2013

Journal of Biomaterials and Nanobiotechnology

Volume 4, Issue 1 (January 2013)

ISSN Print: 2158-7027 ISSN Online: 2158-7043

Google-based Impact Factor: 1.77 Citations

Sintering and Mechanical Properties of Magnesium and Fluorine Co-Substituted Hydroxyapatites ()

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DOI: 10.4236/jbnb.2013.41001 5,978 Downloads 9,208 Views Citations

Author(s)

Samia Nsar, Amel Hassine, Khaled Bouzouita

Affiliation(s)

Laboratory of Industrial Chemistry, National School of Engineering, Sfax, Tunisia.

ABSTRACT

Biological apatites contain several elements as traces. In this work, Magnesium and fluorine co-substituted hydroxyapatites with the general formula Ca₉Mg(PO₄)₆(OH)_2-yF_y, where y = 0, 0.5, 1, 1.5 and 2 were synthesized by the hydrothermal method. After calcination at 500℃, the samples were pressureless sintered between 950℃ and 1250℃. The substitution of F^- for OH^- had a strong influence on the densification behavior and mechanical properties of the materials. Below 1200℃, the density steeply decreased for y = 0.5 sample. XRD analysis revealed that compared to hydroxylfluorapatite containing no magnesium, the substituted hydroxyfluorapatites decomposed, and the nature of the decomposition products is tightly dependent on the fluorine content. The hardness, elastic modulus and fracture toughness of these materials were investigated by Vickers’s hardness testing. The highest values were 622 ± 4 GPa, 181 ± 1 GPa and 1.85 ± 0.06 MPa.m^1/2, respectively.

KEYWORDS

Hydroxyapatite; Magnesium, Fluorine; Sintering; Mechanical Properties

Share and Cite:

Nsar, S. , Hassine, A. and Bouzouita, K. (2013) Sintering and Mechanical Properties of Magnesium and Fluorine Co-Substituted Hydroxyapatites. Journal of Biomaterials and Nanobiotechnology, 4, 1-11. doi: 10.4236/jbnb.2013.41001.

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