СТРУКТУРА И ЭЛЕМЕНТНЫЙ СОСТАВ АНОДНЫХ АЛЮМООКСИДНЫХ ПЛЕНОК, СФОРМИРОВАННЫХ В СЕРНОКИСЛОМ ЭЛЕКТРОЛИТЕ ВЫСОКОЙ КОНЦЕНТРАЦИИ

Porous aluminium anodization process has been investigated in 63 wt % sulfuric electrolyte. Porous alumina formed at anodic voltages till 16 V had the «honey comb» cell structure while porous alumina formed at anodic voltages more than 16 V displayed the tubular cell structure with thickness expansion factor more than 2,5. The obtained results can be explained by resulted of Al(OH)3 formation during anodization process at high electric field inside anodic films.Представлены результаты исследования электрохимического анодирования алюминиевой фольги и тонких алюминиевых пленок, осажденных на кремниевые пластины, в сернокислом электролите высокой концентрации при разных напряжениях формовки. Показано, что при увеличении напряжения формовки более 16 В происходит формирование трубчатой структуры анодного оксида, большую часть которого составляет гидрооксид алюминия. При этом коэффициент роста толщины анодных пленок увеличивается до 3, а коэффициент формовки гексагональных ячеек снижается до 2,2 нм/В

ОПТИЧЕСКИЕ СВОЙСТВА АНОДНОГО ОКСИДА ТИТАНА И ЕГО ПРИМЕНЕНИЕ В ЧЕЛЮСТНО-ЛИЦЕВОЙ ХИРУРГИИ

Studying of anodic titania formation has showen that anodization forming factor at low anodic voltages is 3,3 nm/V, while at high anodic voltages it’s value decreases till 1,5 nm/V. The investigation of optical properties of anodic titania has showed the possibilities to tune the titania refractory index in the whole visible ranges. The application of anodic titania in maxillofacial surgery has been demonstrated for visualization of titanium objects.Исследован процесс формирования оксида титана методом электрохимического анодирования. Сформированы пленки плотного оксида титана различных цветов, установлена линейная зависимость толщины пленки оксида от напряжения формовки и параболическая зависимость коэффициента формовки от напряжения формовки. Это определяет оптические свойства образующихся оксидных пленок и возможность управления их коэффициентом отражения во всем видимом оптическом диапазоне. Опробовано использование исследуемых пленок для визуализации и маскирования объектов, используемых в челюстно-лицевой хирургии

Ion Source—Thermal and Thermomechanical Simulation

The main purpose of this work is to conduct ground development testing of the ion source intended for use the space debris contactless transportation system. In order to substantiate the operating capability of the developed ion source, its thermal and thermomechanical simulation was carried out. The ion source thermal model should verify the ion source operating capability under thermal loading conditions, and demonstrate the conditions for ion source interfacing with the systems of the service spacecraft with the ion source installed as a payload. The mechanical and mathematical simulation for deformation of the ion source ion-extraction system profiled electrodes under thermal loading in conjunction with the prediction of the strained state based on the numerical simulation of the ion source ion-extraction system units, making it possible to ensure the stability of the ion source performance. Good agreement between the thermal and thermo-mechanical ion source simulation results and experimental data has been demonstrated. It is shown that the developed ion source will be functional in outer space and can be used as an element of the space debris contactless transportation system into graveyard orbits

Structure and element composition of anodic alumina films formed in high concentrated sulfuric electrolyte

Porous aluminium anodization process has been investigated in 63 wt % sulfuric electrolyte. Porous alumina formed at anodic voltages till 16 V had the «honey comb» cell structure while porous alumina formed at anodic voltages more than 16 V displayed the tubular cell structure with thickness expansion factor more than 2,5. The obtained results can be explained by resulted of Al(OH)3 formation during anodization process at high electric field inside anodic films

Extreme Heating of Alumina Barrier Layer During High Electric Field Anodization of Aluminum

The temperature of alumina barrier layer during a high electric field anodization of aluminum (the current density more than 50mA/cm2)2) has been studied by analyzing the aluminum film resistance. In the case of Joule heat power density to be larger than 20W/cm2, the temperature inside the barrier layer can exceed 660∘660∘C, which leads to the local melting of aluminum. Scanning electron microscopy has shown the location of molten aluminum droplets and their movement during the anodization process

Effect of the surface structure of titanium implants on the response to the bone tissue

The growth of bone tissue on titanium plates and mounting screws during surgical treatment of rabbit bones was studied. The growth of bone tissue was more intensive on the developed nanostructured titania surface in comparison with the planar titania surface. The methods of electrochemical treatment of a titanium surface in order to control the regeneration process of the bone tissue on the titanium constructions were proposed

Optical properties of anodic titania and it's application in maxillofacial surgery

Исследован процесс формирования оксида титана методом электрохимического анодирования. Сформированы пленки плотного оксида титана различных цветов, установлена линейная зависимость толщины пленки оксида от напряжения формовки и параболическая зависимость коэффициента формовки от напряжения формовки. Это определяет оптические свойства образующихся оксидных пленок и возможность управления их коэффициентом отражения во всем видимом оптическом диапазоне. Опробовано использование исследуемых пленок для визуализации и маскирования объектов, используемых в челюстно-лицевой хирургии.Studying of anodic titania formation has showen that anodization forming factor at low anodic voltages is 3,3 nm/V, while at high anodic voltages it’s value decreases till 1,5 nm/V. The investigation of optical properties of anodic titania has showed the possibilities to tune the titania refractory index in the whole visible ranges. The application of anodic titania in maxillofacial surgery has been demonstrated for visualization of titanium objects