Structure and properties of titanium oxide-based protective coatings

The presented work examined the composition of nitrogen plasma with weight average temperature 49 kК. Correlation between the treatment mode and the structural-phase composi-tion and hydrophobic properties of the titanium oxide coating was found. It was shown that regardless of the plasma treatment mode, all coatings had a high microhardness value of more than 25 GРa and a high resistivity of more than 3105 Om cm.

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Влияние состава низкотемпературной азотной плазмы на гидрофильные и гидрофобные свойства покрытий на основе азотированного оксида титана

Письма в журнал технической физики ◽

10.21883/pjtf.2021.19.51511.18861 ◽

2021 ◽

Vol 47 (19) ◽

pp. 34

Author(s):

А.Э. Муслимов ◽

М.Х. Гаджиев ◽

Р.М. Эмиров ◽

А.М. Исмаилов ◽

В.М. Каневский

Keyword(s):

Contact Angle ◽

Elemental Composition ◽

Titanium Oxide ◽

Structural Phase ◽

Nitrogen Plasma ◽

Plasma Composition ◽

Properties Of Coatings ◽

Hydrophobic Properties ◽

Hydrophobic Coatings ◽

High Microhardness

Effect of nitrogen plasma composition on structural-phase and elemental composition, topography, mechanical and hydrophobic properties of coatings on the basis of nitrogen-containing titanium oxide during penetration onto sample in open atmosphere is studied. It has been shown that at an equally high microhardness of the order of 25-27 GPa, by controlling the composition of the nitrogen plasma, either hydrophilic (contact angle 73 °) or hydrophobic coatings (contact angle 120 °) can be formed.

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Microstructure and Microhardness of Chrome-Oxide Coating Precipitating from Gases Phase Using Liquid of Metal Organic Chrome Compositions

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.803.60 ◽

2019 ◽

Vol 803 ◽

pp. 60-64

Author(s):

Taha A. Tabaza ◽

Safwan Al-Qawabah ◽

Omar T. Tabaza ◽

Amjad Al-Sakarneh

Keyword(s):

Protective Coatings ◽

Oxide Coating ◽

Final Phase ◽

Experimental Conditions ◽

Chrome Coating ◽

High Microhardness ◽

Metal Organic ◽

Excellent Adhesion ◽

Effect Of Oxygen ◽

Gases Phase

In this work, the research team analyzes the effect of oxygen-containing additives on the microstructure and microhardness of coatings of the specimens obtained during applying pyrolytic chrome coating using metal-organic compounds (MOC) in order to obtain protective coatings. The results showed that chromium oxidation in the final phase of the coating process changed the microstructure and mechanical properties of the coating. The resulting coatings exhibit excellent adhesion, high microhardness (6-8 and up to 20-22 GPa depending on the experimental conditions) and better microplasticity, corrosion and wear resistance. In this work the effect of oxidizer on the microstructure and microhardness will be illustrated.

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Synthesis, structure, and properties of nitrilo-tris(methylenephosphonato)-triaquairon(II) {Fe[µ-NH(CH2PO3H)3](H2O)3}, as an ingredient of anticorrosive protective coatings on the steel surface

Crystallography Reports ◽

10.1134/s1063774515060334 ◽

2015 ◽

Vol 60 (6) ◽

pp. 853-859 ◽

Cited By ~ 16

Author(s):

N. V. Somov ◽

F. F. Chausov ◽

R. M. Zakirova ◽

M. A. Shumilova ◽

V. A. Aleksandrov ◽

...

Keyword(s):

Steel Surface ◽

Protective Coatings ◽

Structure And Properties

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Coating of Austentic Stainless Steel with Ti/O Compositionally Gradient Film by Reactive DC Sputtering

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.45.1218 ◽

2006 ◽

Vol 45 ◽

pp. 1218-1223

Author(s):

Tsutomu Sonoda ◽

Akira Watazu ◽

Kiyotaka Katou ◽

Tadashi Asahina

Keyword(s):

Stainless Steel ◽

Titanium Oxide ◽

Oxygen Content ◽

Abrasion Resistance ◽

Steel Substrate ◽

High Hardness ◽

Oxide Coating ◽

Mixing Condition ◽

Compositional Gradient ◽

Dc Sputtering

Coating of austentic stainless steel substrates with Ti/O compositionally gradient film was examined using reactive DC sputtering technique, in order to improve not only the abrasion resistance of the stainless steel but also the adhesion between the deposited film and the substrate with preserving the high hardness of such a hard ceramic coating as titanium oxide coating. The deposition of Ti/O compositional gradient films were realized by varying continuously the oxygen content in Ar-O2 sputter-gas during the reactive sputtering. The obtained films were appeared to be uniform and adhesive, while Ti-O compositional constant (i.e. non-gradient) films which were deposited by reactive DC sputtering under the same sputtering conditions except for the Ar-O2 gas mixing condition, i.e., with the oxygen content in the gas mixture constant, peeled off partly. According to AES in-depth profiles, the oxygen (O) concentration in the obtained film gradually decreased in depth direction from the surface toward the substrate, confirming that Ti/O compositional films had formed on the stainless steel. On the basis of XRD, it was found that not only hcp alpha-titanium and titanium oxide (anatase) but also some types of suboxides had formed in the gradient films. Furthermore the gradient films approximately indicated Hv600 which was much higher than that of the stainless steel substrate. Therefore the abrasion resistance of the stainless steel and the adhesion at the interface were expected to be improved at the same time.

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Structure and properties of titanium oxide layers deposited by reactive plasma activated electron beam evaporation

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2005.02.080 ◽

2005 ◽

Vol 200 (1-4) ◽

pp. 306-309 ◽

Cited By ~ 41

Author(s):

T. Modes ◽

B. Scheffel ◽

Chr. Metzner ◽

O. Zywitzki ◽

E. Reinhold

Keyword(s):

Electron Beam ◽

Titanium Oxide ◽

Electron Beam Evaporation ◽

Structure And Properties ◽

Oxide Layers ◽

Reactive Plasma

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Influence of the Structure of the Titanium Oxide Coating Surface on Immunocompetent Tumor Cells

Russian Physics Journal ◽

10.1007/s11182-016-0678-y ◽

2016 ◽

Vol 58 (11) ◽

pp. 1527-1533 ◽

Cited By ~ 5

Author(s):

I. A. Khlusov ◽

Yu. P. Sharkeev ◽

V. F. Pichugin ◽

E. V. Legostaeva ◽

L. S. Litvinova ◽

...

Keyword(s):

Tumor Cells ◽

Titanium Oxide ◽

Oxide Coating ◽

Coating Surface ◽

Titanium Oxide Coating

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Leveling Coatings for Reducing Atomic Oxygen Defect Density in Graphite Fiber-Epoxy Composites

Journal of the IEST ◽

10.17764/jiet.2.37.3.l4133w17742570j2 ◽

1994 ◽

Vol 37 (3) ◽

pp. 26-31

Author(s):

D. Jaworske ◽

K. de Groh ◽

G. Podojil ◽

T. McCollum ◽

J. Anzic

Keyword(s):

Atomic Oxygen ◽

Defect Density ◽

Protective Coatings ◽

Protective Layer ◽

Oxide Coating ◽

Low Earth Orbit ◽

Earth Orbit ◽

Protective Oxide ◽

Low Viscosity ◽

Defect Sites

Pinholes or other defect sites in a protective oxide coating provide pathways for atomic oxygen in low-Earth orbit to reach underlying material. Onc concept for enhancing the lifetime of materials in low-Earth orbit is to apply a leveling coating to the material prior to applying any reflective and protective coatings. Using a surface-tension-leveling coating concept, a low-viscosity epoxy was applied to the surface of several composite coupons. A protective layer of 1000 Å of SiO2 was deposited on top of the leveling coating, and the coupons were exposed to an atomic oxygen environment in a plasma asher. Pinhole populations per unit area were estimated by counting the number of undercut sites observed by scanning electron microscopy. Defect density values of 180,000 defects/cm2 were reduced to about 1000 defects/cm2 as a result of the applied leveling coating. These improvements occur at a mass penalty of about 2.5 mg/cm2.

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