Structural and morphological features of the ultrasound-assisted micro-arc oxidation coatings

UMAOH Calcium Phosphate Coatings Designed for Drug Delivery: Vancomycin, 5-Fluorouracil, Interferon α-2b Case

“…The SEM of the coatings' cross-section (Figure 2a,c,e) reveals the influence of the US field, which resulted in a slight increase in thickness from 50 to 60 µm and a significant increase in the average pore size from 2.5 to 4.7 µm. These results represent the following previously published data [38]. The observed results are due to the formation of local macropores having a size in the range of 15-35 µm (Figure 2c,e).…”

“…The UMAO process was carried out in an anodic potentiostat regime with the following parameters: MAO pulse frequency of 50 Hz; MAO pulse duration of 100 µs; time of 10 min; anodic voltage of 200 V; sinewave US frequency of 35 kHz; capacity of 100 W. According to our previous results, three deposition regimes were chosen [36][37][38]: I-MAO (control regime without induced US field); II-UMAO (MAO with applied US field); III-UMAOH (hybrid regime consisting of MAO with US influence for 8 min and subsequent MAO without US for 2 min).…”

“…According to the [34][35][36], it was reported that the superposition of a US field during MAO is accompanied by cavitation on the electrode surfaces, acceleration of heat and mass transfer in the electrolyte solution, intensification of electrolyte penetration into micropores and cracks, dispersion of particles and liquid electrolyte clusters, degassing, and activation of crystallization and electrochemical processes. High US frequencies at low amplitude create an acoustic field with a high energy level, which makes it possible to intensify the processes of mass transfer in the electrolyte, increase the growth rate of coatings, and also control the composition, structure, and porosity of the deposited coatings [36][37][38].…”

VLIYaNIE PLOTNOSTI TOKA MIKRODUGOVOGO OKSIDIROVANIYa POD DEYSTVIEM VNEShNEGO UL''TRAZVUKA NA ZAKONOMERNOSTI ROSTA KAL''TsIYFOSFATNYKh POKRYTIY

“…Секция 7. Тонкие пленки и многослойные покрытия как иерархически организованные структуры DOI: 10.17223/9785946219242/284 ВЛИЯНИЕ ПЛОТНОСТИ ТОКА МИКРОДУГОВОГО ОКСИДИРОВАНИЯ ПОД ДЕЙСТВИЕМ ВНЕШНЕГО УЛЬТРАЗВУКА НА ЗАКОНОМЕРНОСТИ РОСТА КАЛЬЦИЙФОСФАТНЫХ ПОКРЫТИЙ 1,2 Казанцева Е.А., 1 Комарова Е.Г., 1 Шаркеев Ю.П. 1 Институт физики прочности и материаловедения СО РАН, Томск 2 НИ Томский государственный университет, Томск…”

“…Синтез КФ покрытий на образцы из титана марки ВТ1-0 проводили методом МДО в базовом электролите [1] в импульсном однополярном анодном режиме при следующих параметрах: напряжение -200 В, длительность импульсов -100 мкс, частота -50 Гц, время нанесения покрытий -10 мин. В зависимости от условий наложенного УЗ в процессе МДО было выбрано три режима: МДО (стандартный режим без внешнего УЗ); МДО/ИУЗ (МДО с наложением импульсного УЗ, частота УЗ -35 кГц, мощность УЗ -35 Вт); МДО/НУЗ (МДО с наложением синусоидального УЗ, частота УЗ -35 кГц, мощность УЗ -100 Вт) [1].…”