The Iron Distribution and Ferromagnetic Areas in PEO Coatings

2018 ◽  
Vol 386 ◽  
pp. 296-300 ◽  
Author(s):  
M.V. Adigamova ◽  
Vladimir S. Rudnev ◽  
E.S. Sergienko ◽  
Peter V. Kharitonskii ◽  
Kamil G. Gareev ◽  
...  
Keyword(s):  
Colloidal Particles ◽  
Electric Discharges ◽  
Iron Hydroxides ◽  
Oxide Coatings ◽  
Properties Of Coatings ◽  
Ferromagnetic Properties ◽  
Iron Distribution ◽  
Force Microscopy ◽  
Electron Scanning Microscopy ◽  
Peo Coatings

Oxide coatings formed on aluminum alloy in electrolyte with colloidal particles of iron hydroxides show ferromagnetic properties. Iron distribution have been studied using electron scanning microscopy and magnetic force microscopy. It is found that the iron localized in the areas exposed to spark and microarc electric discharges makes the main contribution to the ferromagnetic properties of coatings.

Morphologic, Photocatalytic and Antibacterial Properties of ZnO-TiO2 Sol-Gel System

2018 ◽  
Vol 762 ◽  
pp. 278-282
Author(s):  
Anzelms Zukuls ◽  
Gundars Mežinskis ◽  
Aigars Reinis ◽  
Ingus Skadins ◽  
Juta Kroica ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Uv Light ◽  
Sol Gel ◽  
Antibacterial Properties ◽  
Ultra Violet ◽  
Properties Of Coatings ◽  
Force Microscopy ◽  
Glass Slides ◽  
Heat Treated ◽  
Colour Changes

Prepared and heat-treated sol-gel ZnO-TiO2 coatings onto microscope glass slides were characterised by atomic force microscopy (AFM), scanning electron microscopy (SEM), as well as absorption spectra of light has been obtained. Thermally treated xerogels were characterised by X-ray diffraction (XRD). As well as their photocatalytic activity using methyl orange (MO) and observing the colour changes over the time in visible light (VIS) and ultra violet (UV) light has been determined. The influence of ZnO concentration on morphology, photocatalytic activity and antibacterial properties of coatings was analysed. The growth of S. epidermidis on the surface of the samples was inhibited due to photocatalytic properties of coatings.

Synthesis of Vanadium Oxide Colloidal Dispersions for Antistatic Coatings

1996 ◽  
Vol 432 ◽  
Author(s):  
Eric.D. Morrison
Keyword(s):  
Vanadium Oxide ◽  
Conduction Mechanism ◽  
Colloidal Particles ◽  
Small Polaron ◽  
Electronic Conductivity ◽  
Colloidal Dispersions ◽  
Thin Layers ◽  
Properties Of Coatings ◽  
Polaron Hopping ◽  
Dispersed Particles

AbstractVanadium oxide deposited in thin layers from aqueous colloidal dispersions exhibits electronic conductivity by a small polaron hopping conduction mechanism. Conductivity and static dissipative properties of coatings are unaffected by changes in humidity. Because vanadium oxide is highly colored, the deposition of effective antistatic coatings which are transparent and colorless requires that the percolative (networking forming) properties of the colloidal particles be maximized. The percolative properties of the colloid are strongly influenced by morphology of the dispersed particles and the extent to which they are well dispersed in the aquasol. These properties are determined by the synthetic route to the colloid. Vanadium oxide is the most potent antistatic agent known and has been found to provide antistatic properties even when as little as 1 milligram per square meter is used.

Stratification of Colloidal Particles on a Surface: Study by a Colloidal Probe Atomic Force Microscopy Combined with a Transform Theory

2018 ◽  
Vol 122 (16) ◽  
pp. 4592-4599 ◽  
Author(s):  
Ken-ichi Amano ◽  
Taira Ishihara ◽  
Kota Hashimoto ◽  
Naoyuki Ishida ◽  
Kazuhiro Fukami ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Colloidal Particles ◽  
Colloidal Probe ◽  
Force Microscopy ◽  
Atomic Force ◽  
Surface Study

The effect of the conditions of formation on ferromagnetic properties of iron-containing oxide coatings on titanium

2012 ◽  
Vol 48 (5) ◽  
pp. 543-552 ◽  
Author(s):  
V. S. Rudnev ◽  
M. V. Adigamova ◽  
I. V. Lukiyanchuk ◽  
A. Yu. Ustinov ◽  
I. A. Tkachenko ◽  
...  
Keyword(s):  
Oxide Coatings ◽  
Ferromagnetic Properties

scholarly journals Influence of Two-Stage Anodization on Properties of the Oxide Coatings on the Ti–13Nb–13Zr Alloy

Coatings ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 707 ◽  
Author(s):  
Agnieszka Ossowska ◽  
Andrzej Zieliński ◽  
Jean-Marc Olive ◽  
Andrzej Wojtowicz ◽  
Piotr Szweda
Keyword(s):  
Optical Emission ◽  
Oxide Coating ◽  
Oxide Coatings ◽  
Two Stage ◽  
Water Contact ◽  
X Ray ◽  
Force Microscopy ◽  
Corrosion Studies ◽  
Increasing Demand ◽  
Scratch Tests

The increasing demand for titanium and its alloys used for implants results in the need for innovative surface treatments that may both increase corrosion resistance and biocompatibility and demonstrate antibacterial protection at no cytotoxicity. The purpose of this research was to characterize the effect of two-stage anodization—performed for 30 min in phosphoric acid—in the presence of hydrofluoric acid in the second stage. Scanning electron microscopy, atomic force microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, Raman spectroscopy, glow discharge optical emission spectroscopy, nanoindentation and nano-scratch tests, potentiodynamic corrosion studies, and water contact angle measurements were performed to characterize microstructure, mechanical, chemical and physical properties. The biologic examinations were carried out to determine the cytotoxicity and antibacterial effects of oxide coatings. The research results demonstrate that two-stage oxidation affects several features and, in particular, improves mechanical and chemical behavior. The processes influencing the formation and properties of the oxide coating are discussed.

Thermally Stimulated Transformation of the Surface Nanoarchitecture of Ni-and Cu-Doped Oxide Coatings on Titanium

2018 ◽  
Vol 386 ◽  
pp. 283-289 ◽  
Author(s):  
Vladimir S. Rudnev ◽  
I.V. Lukiyanchuk ◽  
Marina S. Vasilyeva ◽  
A.A. Zvereva
Keyword(s):  
Catalytic Activity ◽  
Copper Oxides ◽  
Oxide Coatings ◽  
Oxidation Of Co ◽  
Annealing Temperatures ◽  
Coating Surface ◽  
Plasma Electrolytic ◽  
Peo Coatings ◽  
Doped Oxide

It has been shown that triangular nanocrystals with a thickness of ~ 50 nm and a height of ~ 500 nm, mainly containing copper oxides, are formed on the surface of Ni-and Cu-doped plasma electrolytic oxide (PEO) coatings on titanium during air annealing at 500-700 °C. Upon the annealing at 750-850 °C, rectangular nanoand micro-sized crystals presumably consisting of nickel tungstate cover the coating surface. At annealing temperatures above 850 °C, the brushes of Ni5TiO7whiskers having a diameter of tens to 200 nm and a length up to 10 μm are formed on the surface. The thermally stimulated change in the surface nanoarchitecture and the composition of nanoformations explains the change in the catalytic activity of the formed composites in oxidation of CO into CO2.

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