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Advanced materials for metal implant coatings♣

E. PECHEVA1,* , L. PRAMATAROVA1, D. FINGAROVA1, T. HIKOV1, I. DINEVA1, Z. KARAGYOZOVA2, S. STAVREV2

Affiliation

  1. Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria
  2. Space Research Institute, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria

Abstract

Metal materials have been used as implants, due to their excellent mechanical properties and corrosion resistance. However, in order to better bind to living bone they need an interfacial inorganic layer. Biological apatite is a bioactive and biocompatible inorganic material, and the main structural component of human bones. However, it has weak mechanical properties and adhesion to metal implant surfaces. Combination of the good mechanical properties of metals with the bioactive properties of apatite has fostered the application of apatite coatings on metal implants. On the other hand, carbonbased materials (diamond-like carbon, detonational nanodiamond, carbon nanotubes, amorphous carbon, etc.) significantly improve the mechanical properties of AP, increase its adhesion, and prevent metal ion release from metal implants. Our goal was to create a new advanced composite material that is to serve as a coating of metal implants. Stainless steel was used for the electrodeposition of the apatite-nanodiamond coatings in simulated body fluid. The results revealed the formation of dense and homogeneous apatite-nanodiamond composite coatings, with better ductility, hardness, cohesion and adhesion to stainless steel, in comparison to pure apatite coatings. We consider that the nanodiamond-reinforced apatite coatings can be considered as advanced materials for the surface modification of metal implants..

Keywords

Advanced materials, Composite coatings, Metals, Mechanical properties.

Submitted at: Nov. 5, 2008
Accepted at: Sept. 9, 2009

Citation

E. PECHEVA, L. PRAMATAROVA, D. FINGAROVA, T. HIKOV, I. DINEVA, Z. KARAGYOZOVA, S. STAVREV, Advanced materials for metal implant coatings♣, Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 9, pp. 1323-1326 (2009)