Результати пошуку

Зараз показуємо 1 - 2 з 2

Using Plasma Electrolytic Oxidation Technologies in the Manufacture with Better Biodesign
(Cham: Springer, 2026-01-17) Povstianoi, Oleksandr; Imbirovych, Natalya; Tkachuk, Valentina
A promising method for changing the surface state of metals and influencing product design is plasma electrolytic oxidation (PEO) as one of the innovative surface treatment methods. The PEO method allows for a wide range of surface modifications, either by strengthening it or by changing its structural and morphological state. In the field of biomedical materials science, the creation of new implant materials with biocompatible, bioactive properties and high osseointegration is particularly relevant. Titanium and zirconium alloys are characterized by an excellent combination of a complex of mechanical and chemical properties with inertness to a living organism, which is ensured by their ability to form a passive film on their sur-face. Such alloys are used in the field of implantology and for the manufacture of surgical instruments and implants. In order to increase osseointegration, the modification of the surface of such alloys with bioactive substances is posi-tive, as well as the influence in the direction of modifying its design, which includes increasing the roughness and porosity of the surface. In this work, the PEO method was used for surface treatment of titanium and zirconium alloys. Experimental studies have established the correlation of the influence of treatment modes, such as the composition of the electrolyte and the ratio of current densities on the roughness and porosity of plasma electrolytically oxi-dized coatings at their optimal thickness. The developed alkaline electrolytes were additionally saturated with such biocomponents as diatomite and hy-droxyapatite.
Formation of Coatings on Titanium Alloys Saturated with Biocomponents by the PEO Method
(Cham: Springer, 2025-02-14) Povstyanoy, Oleksandr; Imbirovych, Nataliia; Boiarska, Inna; Nykoliuk, Tamara
In the work, the influence of the composition of the electrolyte on the elec-trophysical parameters of the synthesis of coatings with increased biocom-patible properties was studied. It was established that under conditions of increased electrolyte concentration, the voltage at which the coating is syn-thesized decreases. This effect can be explained by the thermodynamic Gibbs conditions. According to these conditions, the system needs more energy when the medium contains more elements, which must also con-sume a certain amount of energy. The authors found that sodium salts in-crease the conductivity of the working environment. This effect affects the speed of the synthesis process and can reduce the cost of the energy re-serve of the system as a whole. Spectral analysis established that during the synthesis of a titanium alloy in an alkaline electrolyte, an equilibrium non-degenerate quasi-ideal plasma is realized in the discharge channel with a temperature of (1...1,1)×104 K and an electron density of (3,2...3,4)×1022 m-3. It is under these conditions that molecules dissociate into ions and interact with the components of the elec-trolyte, which leads to oxidation of the surface of valve metals and the formation of stable compounds with high biocompatible properties.

Наукові статті

Переглянути

Фільтри

Налаштування

Сортувати за

Результатів на сторінку

Результати пошуку