Electrodeposition and physicomechanical properties of coatings and foil of copper reinforced with nanosize aluminum oxide

2014 ◽  
Vol 87 (5) ◽  
pp. 596-600 ◽  
Author(s):  
N. D. Sakhnenko ◽  
O. A. Ovcharenko ◽  
M. V. Ved’
Keyword(s):  
Aluminum Oxide ◽  
Physicomechanical Properties ◽  
Properties Of Coatings

Metallographic Studies into the Structure and Physicomechanical Properties of Coatings Obtained Using Plasma Methods

Metallurgist ◽  
2021 ◽  
Author(s):  
I. N. Kravchenko ◽  
S. V. Kartsev ◽  
S. A. Velichko ◽  
Yu. A. Kuznetsov ◽  
O. A. Sharaya ◽  
...  
Keyword(s):  
Physicomechanical Properties ◽  
Properties Of Coatings ◽  
Plasma Methods

Investigation of properties of coatings made by plasma deposition of aluminum oxide on titanium alloy parts

2019 ◽  
Vol 3 ◽  
pp. 26-28
Author(s):  
I.N. Kravchenko ◽  
◽  
A.A. Sevryukov ◽  
V.M. Korneyev ◽  
T.A. Chekha ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Aluminum Oxide ◽  
Plasma Deposition ◽  
Properties Of Coatings

Study of the Composition and Properties of Coatings being Formed during Combustion of Al + B2O3 Mixtures on Steel Substrates

2021 ◽  
Vol 1022 ◽  
pp. 87-96
Author(s):  
Alexandr Shegolev ◽  
Alexey Ishkov ◽  
Vladimir N. Malikov
Keyword(s):  
Aluminum Nitride ◽  
Aluminum Oxide ◽  
Experimental Research ◽  
High Speed ◽  
Amorphous Boron ◽  
Properties Of Coatings ◽  
Workpiece Surface ◽  
Hardening Coatings ◽  
Steel Substrates

Within the scope of this work, the methods of the experimental research of SHS processes during HFC-heating, particularly of hardening coatings applied on samples by HFC-heating have been developed. A study of the composition and properties of the products formed during the SHS process in the basic mixture on the surface of S355 steel parts during HFC-heating has been made, and it has been shown that aluminum oxide, aluminum nitride (by-product), and amorphous boron are formed under these conditions, and composite porous inhomogeneous coatings up to 250 microns thick, based on aluminum oxide, SHS products in the basic mixture and traces of high-speed HFC-boriding products are formed on the workpiece surface.

Analysis of Initial Gas Media and their Influence on the Process of Diffusion Saturation

2016 ◽  
Vol 712 ◽  
pp. 256-260
Author(s):  
Konstantin Bakhrunov
Keyword(s):  
Aluminum Oxide ◽  
Diffusion Saturation ◽  
Structure And Properties ◽  
Properties Of Coatings ◽  
Gas Medium

The work analyses gas media (activators) and their influence on the process of circular aluminizing of nickel-based heat-proof alloys of grade ZhS. The paper studies the structure and properties of coatings in ZhS alloys after circular aluminizing in initial gas media NiCl2+NH4Cl, AlCl3+NH4Cl, NiCl2 and NH4Cl. The analysis of the formation of gas medium in the muffle of the circulation setup allows excluding unwanted inclusions (nitrogen, aluminum oxide) and their occurrence in coatings, which lead to their embrittlement and early cracking.

scholarly journals Comparative Study of Structures and Properties of Detonation Coatings with α-Al2O3 and γ-Al2O3 Main Phases

Coatings ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1566
Author(s):  
Bauyrzhan Rakhadilov ◽  
Dauir Kakimzhanov ◽  
Daryn Baizhan ◽  
Gulnar Muslimanova ◽  
Sapargali Pazylbek ◽  
...  
Keyword(s):  
Aluminum Oxide ◽  
Comparative Study ◽  
Lower Layer ◽  
Oxide Coating ◽  
Primary Phase ◽  
Main Phase ◽  
Wear Volume ◽  
Detonation Spraying ◽  
Properties Of Coatings ◽  
Α Al2o3

This study is aimed at obtaining a coating of aluminum oxide containing α-Al2O3 as the main phase by detonation spraying, as well as a comparative study of the structural, tribological and mechanical properties of coatings with the main phases of α-Al2O3 and γ-Al2O3. It was experimentally revealed for the first time that the use of propane as a combustible gas and the optimization of the technological regime of detonation spraying leads to the formation of an aluminum oxide coating containing α-Al2O3 as the main phase. Tribological tests have shown that the coating with the main phase of α-Al2O3 has a low value of wear volume and coefficient of friction in comparison with the coating with the main phase of γ-Al2O3. It was also determined that the microhardness of the coating with the main phase of α-Al2O3 is 25% higher than that of the coatings with the main phase of γ-Al2O3. Erosion resistance tests have shown (evaluated by weight loss) that the coating with α-Al2O3 phase is erosion-resistant compared to the coating with γ-Al2O3 (seen by erosion craters). However, the coating with the main phase of γ-Al2O3 has a high value of adhesion strength, which is 2 times higher than that of the coating with the main phase of α-Al2O3. As the destruction of coatings by the primary phase, α-Al2O3 began at low loads than the coating with the main phase γ-Al2O3. The results obtained provide the prerequisites for the creation of wear-resistant, hard and durable layered coatings, in which the lower layer has the main phase of γ-Al2O3, and the upper layer has the main phase of α-Al2O3.

Triboengineering and physicomechanical properties of nanocomposites based on PTFE and aluminum oxide

2008 ◽  
Vol 29 (6) ◽  
pp. 466-469 ◽  
Author(s):  
A. A. Okhlopkova ◽  
S. A. Sleptsova ◽  
A. G. Parnikova ◽  
T. M. Ul’yanova ◽  
O. Yu. Kalmychkova
Keyword(s):  
Aluminum Oxide ◽  
Physicomechanical Properties
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