The influence of the electrolyte nature and PEO process parameters on properties of anodized Ti-15Mo alloy intended for biomedical applications

Banakh, Oksana (School of Engineering – HE-Arc Ingénierie, HES-SO // University of Applied Sciences Western Switzerland) ; Snizhko, Lyubov (Ukrainian State University of Chemical Technology (USUCT), Dnepropetrovsk, Ukraine) ; Journot, Tony (School of Engineering – HE-Arc Ingénierie, HES-SO // University of Applied Sciences Western Switzerland) ; Gay, Pierre-Antoine (School of Engineering – HE-Arc Ingénierie, HES-SO // University of Applied Sciences Western Switzerland) ; Csefalvay, Catherine (School of Engineering – HE-Arc Ingénierie, HES-SO // University of Applied Sciences Western Switzerland) ; Kalinichenko, Oleg (Ukrainian State University of Chemical Technology (USUCT), Dnepropetrovsk, Ukraine) ; Girin, Oleg (Ukrainian State University of Chemical Technology (USUCT), Dnepropetrovsk, Ukraine) ; Marger, Laurine (Laboratory of Biomaterials, University of Geneva, Switzerland) ; Durual, Stéphane (Laboratory of Biomaterials, University of Geneva, Switzerland)

Plasma electrolytic oxidation (PEO) of Ti-15Mo alloys conducted in electrolytes containing Ca and P compounds can be an efficient process with which to obtain bioactive coatings. This paper reports on the influence of the nature of the electrolyte, its concentration, and PEO process parameters on the properties of anodized layers on Ti-15Mo. A wide range of Ca- and P-containing alkaline and acidic solutions was employed to incorporate Ca and P ions into the anodized layer. The efficiency of the incorporation was evaluated by the Ca/P ratio in the coating as compared to that in the electrolyte. It was found that alkaline solutions are not suitable electrolytes for the formation of good quality, uniform PEO coatings. Only acidic electrolytes are appropriate for obtaining well-adherent homogeneous layers on Ti-15Mo. However, the maximum Ca/P ratios reached in the coatings were rather low (close to 1). The variation of electrical signal (negative-to-positive current ratio, frequency) and time of electrolysis do not result in a substantial change of this value. The processing time, however, did influence the coating thickness. Despite their low Ca/P ratio, the anodized layers demonstrate good biological activity, comparable to pure microrough titanium.


Mots-clés:
Type d'article:
scientifique
Faculté:
Ingénierie et Architecture
Ecole:
HE-Arc Ingénierie Haute école Arc Ingénierie
Classification:
Ingénierie
Date:
2018-05
Pagination:
14 p.
Publié dans
Metals
Numérotation (vol. no.):
2018, 8, 5, 370
DOI:
ISSN:
2075-4701
Le document apparaît dans:



 Notice créée le 2018-06-12, modifiée le 2018-09-11

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