Wear resistance of chromium oxide nanostructured coatings

It is shown that a new type of electrode is obtained during the process of electrospark doping of the aluminum alloy surfaces, the microstructure of which is a mechanical mixture consisting of grains of high-melting component surrounded by a thin grid of low-melting component, which makes it possible to obtain micro- and nanowires made of low-melting component in the coating and leads to a significant improvement of the wear resistance of the coating. If the specified proportions of the components of the electrode are changed, micro- and nanowires will not be formed in the coating.

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Microstructure and mechanical properties of chromium oxide coatings

Journal of Materials Research ◽

10.1557/jmr.2007.0445 ◽

2007 ◽

Vol 22 (12) ◽

pp. 3531-3537 ◽

Cited By ~ 33

Author(s):

Xiaolu Pang ◽

Kewei Gao ◽

Alex A. Volinsky

Keyword(s):

Wear Resistance ◽

Elastic Modulus ◽

Chromium Oxide ◽

Photoelectron Spectroscopy ◽

Oxide Coating ◽

Oxygen Flux ◽

Low Carbon ◽

Oxide Coatings ◽

X Ray ◽

Coating Microstructure

Chromium oxide coatings were deposited on low-carbon steel by radiofrequency reactive magnetron sputtering at different oxygen flux values. X-ray diffraction, x-ray photoelectron spectroscopy, and high-resolution transmission electron microscopy were used to investigate the microstructure of chromium oxide coatings. Varying oxygen flux changed the coating microstructure; as with increasing oxygen flux the chromium oxide coating undergoes amorphous-to-crystalline transformation. The coating developed strong (300) texture at higher oxygen flux. Hardness, elastic modulus, wear resistance, and adhesion were investigated by nanoindentation and pin-on-disk tests. With changes in the coating microstructure as a function of increased oxygen flux, hardness, elastic modulus, and wear resistance were improved, but its adhesion was weakened.

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Wear-resistance of nanostructured coatings based on diamond-like carbon and compounds of titanium with carbon

Journal of Physics Conference Series ◽

10.1088/1742-6596/857/1/012034 ◽

2017 ◽

Vol 857 ◽

pp. 012034 ◽

Cited By ~ 1

Author(s):

S A Plotnikov ◽

A B Vladimirov ◽

A B Rinkevich ◽

A P Rubshtein ◽

J Zhang ◽

...

Keyword(s):

Wear Resistance ◽

Nanostructured Coatings ◽

Diamond Like Carbon

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Application of TEM to Deformation, Wear, and Fracture of Ceramics

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100052377 ◽

1974 ◽

Vol 32 ◽

pp. 472-473

Author(s):

B. J. Hockey

Keyword(s):

Wear Resistance ◽

High Temperature ◽

Mechanical Behavior ◽

Brittle Materials ◽

High Temperature Strength ◽

Wide Range ◽

Corrosive Environments ◽

Further Development

Ceramics, such as Al2O3 and SiC have numerous current and potential uses in applications where high temperature strength, hardness, and wear resistance are required often in corrosive environments. These materials are, however, highly anisotropic and brittle, so that their mechanical behavior is often unpredictable. The further development of these materials will require a better understanding of the basic mechanisms controlling deformation, wear, and fracture.The purpose of this talk is to describe applications of TEM to the study of the deformation, wear, and fracture of Al2O3. Similar studies are currently being conducted on SiC and the techniques involved should be applicable to a wide range of hard, brittle materials.

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The spalling of chromium oxide on an FeCr alloy

Corrosion Science ◽

10.1016/s0010-938x(66)80071-9 ◽

1966 ◽

Vol 6 (11-12) ◽

pp. 549-550 ◽

Cited By ~ 3

Author(s):

V HOWES

Keyword(s):

Chromium Oxide ◽

Fecr Alloy

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Abrasive wear of polymer/steel gear drives

Progress in Agricultural Engineering Sciences ◽

10.1556/progress.4.2008.1 ◽

2008 ◽

Vol 4 (1) ◽

pp. 1-26

Author(s):

Gábor Kalácska

Keyword(s):

Wear Resistance ◽

Abrasive Wear ◽

Material Selection ◽

Solid Particles ◽

Soil Types ◽

General View ◽

Modern Engineering ◽

Clean Environment ◽

Engineering Polymers ◽

Plastic Gears

Research was performed on the friction, wear and efficiency of plastic gears made of modern engineering polymers and their composites both in a clean environment (adhesive sliding surfaces) and in an environment contaminated with solid particles and dust (abrasive), with no lubrication at all. The purpose is to give a general view about the results of abrasive wear tests including seven soil types as abrasive media. At the first stage of the research silicious sand was applied between the meshing gears and the wear of plastic and steel gears was evaluated and analyzed from the point of different material properties (elongation at break, hardness, yield stress, modulus of elasticity) and its combinations. The different correlations between the experienced wear and material features are also introduced. At the second stage of the project the abrasive sand was replaced with different physical soil types. The abrasive wear of gears is plotted in the function of soil types. The results highlight on the considerable role of physical soil types on abrasive wear resistance and the conclusions contain the detailed wear resistance. The results offer a new tribology database for the operation and maintenance of agricultural machines with the opportunity of a better material selection according to the dominant soil type. This can finally result longer lifetime and higher reliability of wearing plastic/steel parts.

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