Czasopismo | INŻYNIERIA MATERIAŁOWA | Rocznik 2017 - zeszyt 3

Cathodic deposition of silver particles on anodized titanium

Osadzanie katodowe cząstek srebra na tytanie utlenionym anodowo

10.15199/28.2017.3.2

nr katalogowy: 107165
10.15199/28.2017.3.2

Streszczenie

The paper presents the process of high voltage anodic oxidation of titanium in the electrolyte containing 2 M H3PO4 + 1% HF. The anodization of titanium was performed at various potentials in the range of 30÷210 V and the time of 30 minutes. As a result, a developed surface titanium oxide on titanium was obtained. Then, on the surfaces of the oxides, silver particles were deposited by cathodic method using the electrolyte containing 0.01 M HNO3 + 0.01 M AgNO3. During the deposition of silver particles, a potential of –1 V was applied for 60 s with respect to the open circuit potential. In order to properly characterize the surface, research techniques were used such as XRD, EDS, SEM as well as corrosion testing. The XRD and EDS examinations have shown the presence of the silver particles on the surface of the titanium oxide. The SEM observations were used to assess the shape and surface morphology of the titanium oxide after anodizing and evaluate the amount of silver particles. The silver particles deposited on the anodized titanium surface exhibited a dendritic shape. On the basis of their arrangement and having monitored the deposition process, it can be assumed that they grow directly from the pores on the oxide surface. This is particularly evident in the most developed oxide surface obtained after oxidation of titanium at 210 V. This research allowed determining the suitability of combined anodic and cathodic treatment of titanium in various electrolytes for medical applications — implants. The resulting morphology of the titanium oxide was evaluated, taking into account the features necessary for the proper osseointegration process (structure, high corrosion resistance and surface morphology). Silver deposited on the anodic oxidized titanium surface causes the oxide layer to exhibit additional bactericidal properties, which is extremely advantageous in medical applications. Excess silver has a negative impact on the surrounding tissue in medical applications. For this reason, the dendritic shape of the obtained particles (high surface area) and their relatively small amount generates a potential in medicine applications.

Słowa kluczowe

Keywords

Bibliografia

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