Effect of electrolysis regimes on the structure and properties of coatings on aluminum alloys formed by anode­cathode micro arc oxidation

The formation of thin oxide films on piston aluminum alloys through the method of micro-arc oxidation is considered. The mechanism of the formation crystal inclusions and high-temperature structures depending on ion current density in time is described. One of the methods of surface strengthening piston aluminum alloys – micro-arc oxidation is described and analyzed. The mechanisms of oxide layers formation taking into account the impact of alloy elements of piston aluminum alloys are considered. The analysis of porous cells is carried out, basic properties of coatings are investigated.

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Properties of coatings formed on aluminum alloys in the anode-cathode mode micro-arc oxidation method

Russian Internet Journal of Industrial Engineering ◽

10.24892/rijie/20150111 ◽

2015 ◽

Vol 3 (1) ◽

pp. 62-64

Keyword(s):

Aluminum Alloys ◽

Properties Of Coatings ◽

Oxidation Method ◽

Micro Arc Oxidation

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The Effect of Silicon in Al-Si Alloys and Electrical Treatment Modes on Structure and Properties of MAO-Coatings

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.299.737 ◽

2020 ◽

Vol 299 ◽

pp. 737-742

Author(s):

N.Yu. Dudareva ◽

R.F. Gallyamova

Keyword(s):

Aluminum Alloy ◽

Aluminum Alloys ◽

High Porosity ◽

Structure And Properties ◽

Micro Hardness ◽

Electrical Treatment ◽

Micro Arc Oxidation ◽

High Silicon

The work shows the influence of the content of silicon in the aluminum alloy and the regimes of micro-arc oxidation (MAO) on the structure and properties of the formed coatings. Treatment of samples from high-silicon aluminum alloys AK12pch (Si ~12 %) and M244 (Si ~25 %) was carried out in two modes, which have different installation capacity MAO. The thickness, micro-hardness, porosity of the formed MAO coatings was investigated. It is established that the increase in the proportion of silicon in the aluminum alloy leads to the formation of MAO coatings of significant thickness (~230 μm), with low micro-hardness (HV ~650) and high porosity (up to ~16 %). Increase 4 times the installation capacity of MAO causes the growth of the thickness of the coating, reduces the porosity of the coating on the alloy AK12pch and increases the porosity of the coating on the alloy M244.

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Investigating formation, structure and properties of coatings based on Cu–Ti alloys

Voprosy Materialovedeniya ◽

10.22349/1994-6716-2018-93-1-175-181 ◽

2019 ◽

pp. 175-181

Author(s):

A. I. Kovtunov ◽

T. V. Semistenova ◽

A. M. Ostryanko

Keyword(s):

Wear Resistance ◽

Heat Resistance ◽

Chemical Compound ◽

Wear Resistant Coating ◽

Titanium Coating ◽

Structure And Properties ◽

Properties Of Coatings ◽

Wear Resistant ◽

Ti Alloys ◽

Titanium Wire

The paper offers technology of argon-arc surfacing with titanium wire in order to form heat and wear resistant coating based on the titanium cuprides. The influence of surfacing modes on the chemical compound and structure of formed coatings is determined. The wear resistance and heat resistance at 600°C and 800°C were researched for copper–titanium coating with 8–63% titanium.

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