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Improving electrochemical properties of [TiC(N)/TiNb(CN)]n multilayer films obtained on 316l stainless steel for biomedical applications

Abstract:

In this work, a [TiC(N)/TiNb(CN)]n multilayer film was deposited using a multi-target magnetron sputtering system, on 316 LVM steel substrates, in order to reduce wear and the release of metal ions, problems associated with steel biocompatible. Electrochemical evaluation of the multilayer is carried out by means of electrochemical impedance spectroscopy using Hank's solution as electrolyte; the tests were performed in function of time at 0, 48, and 720 hours at a temperature of 37 ° C. The morphological characterization of the mechanism of attack on the surfaces after the test was performed by scanning electron microscopy. The corrosion products were determined by X-ray diffraction, it was determined that the multilayer-coated steel systems [TiC(N)/TiNb(CN)]n reached all-time improvements assessed. Which is attributed to an increase in the density and in the number of interfaces of the multilayer coatings, which causes the energy required for the Cl-ions traverse these is greater interfaces, therefore, the amount of ions is reduced to attack the substrate. © 2014 The Authors.