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Effect of Copper Inclusion Antibacterial Behavior, Corrosion Resistivity of Calcium Silicate Coatings

A. Speirs, X. Huang


The study focused on the effect of copper (Cu2+) inclusion on the bioactivity, antibacterial behavior, corrosion resistivity and leaching characteristics of calcium silicate coatings on titanium metal. The process of stoichiometric CaSiO3 and five different concentrations of Cu2+ substitutions in CaSiO3. The incorporation of Cu2+ in the crystal lattice of CaSiO3 was examined by means of the Rietveld refinement technique. The  limit of Cu2+ in the crystal lattice of CaSiO3 was determined as 4.399 wt% of Cu2+ and the increased level of Cu2+ substitution result in the form of an additional phase of tenorite (CuO). The fabrication of stoichiometric CaSiO3 and Cu2+ substitutions in CaSiO3 coatings on Ti metal was achieved through an electrophoretic deposition technique and no change  was noted until the heat  temperature reached 800 ○C. Immersion tests of CaSiO3 coatings in simulated body fluid solution resulted in the  layer within 3 days of immersion. Antibacterial tests show pure CaSiO3 powders did not exhibited any antibacterial activity and the presence of Cu2+ in CaSiO3 resulted in good activity against E. coli and S. aureus. Potentiodynamic polarization tests performed on the Cu2+ doped CaSiO3 coatings resulted in its better corrosion resistivity when compared to the pure metal and dissolution tests performed on coatings.


Calcium Silicate, Bioactivity tests, Electrochemical Corrosion Tests, Behavior of Coatings

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