scholarly journals Deposition of titanium based coatings by reactive detonation spraying

2018 ◽  
Vol 62 (1) ◽  
pp. 6-13 ◽  
Author(s):  
S. Panin ◽  
I. Vlasov ◽  
D. Dudina ◽  
V. Ulyanitsky ◽  
R. Stankevich ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Composite Coatings ◽  
Detonation Spraying ◽  
Gas Detonation ◽  
Carrier Gas ◽  
Deposition Parameters ◽  
Spraying Parameters ◽  
Wide Range ◽  
The Individual ◽  
Gas Detonation Spraying

Abstract The structure and mechanical properties of the coatings formed by reactive detonation spraying of titanium in a wide range of spraying conditions were studied. The variable deposition parameters were the nature of the carrier gas, the spraying distance, the O2/C2H2 ratio, and the volume of the explosive mixture. The phase composition of the coatings and the influence of the spraying parameters on the mechanical properties of the coatings were investigated. In addition, nanohardness of the individual phases contained the coatings was evaluated. It was found that the composition of the strengthening phases in the coatings depends on the O2/C2H2 ratio and the nature of the carrier gas. Detonation spraying conditions ensuring the formation of composite coatings with a set of improved mechanical properties are discussed.

scholarly journals Tribological wear of Fe-Al coatings applied by gas detonation spraying

2021 ◽  
Author(s):  
Tomasz Chrostek
Keyword(s):  
Dry Friction ◽  
Shear Stresses ◽  
X Ray Diffraction ◽  
Detonation Spraying ◽  
Gas Detonation ◽  
Compressive Stresses ◽  
Spraying Parameters ◽  
Thin Oxide Films ◽  
Pin On Disc ◽  
The Coefficient Of Friction

Comparative tests of gas detonation (GDS) coatings were carried out in order to investigate the influence of spraying parameters on abrasive wear under dry friction conditions. The tests were carried out using the pin-on-disc (PoD) method at room temperature. The microstructure of the coatings was analysed by X-ray diffraction (XRD) and scanning electron microscopy (SEM / EDS) methods. The results showed that with specific GDS process parameters, the main phases in both coatings were FeAl and Fe3Al involving thin oxide films Al2O3. The tribological tests proved that the coatings sprayed with the shorter barrel of the GDS gun showed higher wear resistance. The coefficient of friction was slightly lower in the case of coatings sprayed with the longer barrel of the GDS gun. During dry friction, oxide layers form on the surface, which act as a solid lubricant. The load applied to the samples during the tests causes shear stresses, thus increasing the wear of the coatings. During friction, the surface of the coatings is subjected to alternating tensile and compressive stresses, which lead to delamination and is the main wear mechanism of the coatings.

EPR and Raman study of silicon layers obtained by gas detonation spraying

2017 ◽  
Vol 71 ◽  
pp. 232-239 ◽  
Author(s):  
N.I. Klyui ◽  
V.Ya. Bratus ◽  
V.P. Temchenko ◽  
V.B. Lozinskii ◽  
V.O. Yukhymchuk ◽  
...  
Keyword(s):  
Detonation Spraying ◽  
Gas Detonation ◽  
Raman Study ◽  
Gas Detonation Spraying

Restoration of drying cylinders on spinning machines by gas detonation spraying

2008 ◽  
Vol 40 (6) ◽  
pp. 545-547 ◽  
Author(s):  
D. V. Min’kov ◽  
V. Yu. Lakunin ◽  
S. T. Kartashov ◽  
O. M. Bashkirov ◽  
A. S. Ivanov ◽  
...  
Keyword(s):  
Detonation Spraying ◽  
Gas Detonation ◽  
Gas Detonation Spraying

The Effects of Operational, Testing and Material Characterisations On the Change in Yield Strength From Plate to Pipe

2021 ◽  
Author(s):  
Jingsi Jiao ◽  
Cheng Lu ◽  
Valerie Linton ◽  
Frank Barbaro
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Yield Strength ◽  
Finite Element Model ◽  
Mechanical Performance ◽  
Element Model ◽  
Critical Knowledge ◽  
Operational Testing ◽  
Wide Range ◽  
The Individual

Abstract The mechanical performance of the pipe sample has a direct influence on their application in real environments and a significant economic impact on manufacturers, especially when the pipe products do not meet required specifications. There is often a change in the yield strength from plate to pipe due to strain hardening and the Bauschinger effect. The current work sets out to provide a critical knowledge base for this change, with emphasizing the important influence of the plate mechanical properties on the pipe. So that the quality of pipe can be further ensured. In the work, firstly, the historical data of the pipe yield strength were collected and plotted together from a wide range of published sources to provide a broad quantitative insight, which provides a quantitative review on the parameters that govern the final pipe yield strength. Secondly, a Finite Element model of the pipe forming and mechanical evaluation was developed and then validated with available industrial testing results, in where the effects of operational and testing parameters on the pipe yield strength were analysed and discussed in detail. Finally, using the validated Finite Element model, a parametric study was conducted to dissect the individual role that each of the material parameters plays on changing the yield strength from plate to pipe. We found that the yield strength of the pipe can differ significantly. This work sheds lights on the desired plate mechanical properties to optimize the final pipe yield strength.

Effect of Uniaxial Compressive Stress during Formation of Porous Aluminum by Mechanochemical Reaction on its Mechanical Properties

2014 ◽  
Vol 922 ◽  
pp. 632-637
Author(s):  
K. Sawamoto ◽  
Noboru Nakayama
Keyword(s):  
Mechanical Properties ◽  
Compressive Stress ◽  
Pure Water ◽  
Mechanochemical Reaction ◽  
Compression Tests ◽  
Porous Aluminum ◽  
Wide Range ◽  
Powder Particles ◽  
Al Powder ◽  
The Individual

Porous Al is a lightweight material with excellent heat insulation and sound absorption properties and is expected to be used in a wide range of applications. A method based on mechanochemical reactions has been developed as an environmentally friendly approach to porous Al production. Pure Al powder reacts with pure water to form a coating layer of Al (OH)3 on the surface of the powder particles. Adjacent particles then bind together by adhesion of their coating layers. Since a large number of voids remain between the individual particles, the compact is classified as porous Al. In the present study, a mixture of pure Al powder and pure water was subjected to uniaxial compressive stresses ranging from 0 to 100 MPa to form porous Al. The mechanical properties of the resulting compact were evaluated in terms of the amount of H2 produced, the density, the Al (OH)3 texture, the amount of Al (OH)3 formed, and the results of subsequent compression tests. The density of the porous Al was found to increase with increasing compressive stress during formation. The largest amounts of H2 (800 ml) were produced under a compressive stress of 10 MPa. As the compressive stress was increased, the total amount of generated Al (OH)3 increased, was approximately constant from 30 to 50 MPa, and then decreased. The initial maximum stress, the plateau stress, and the absorbed energy increased with increasing compressive stress and were 100 MPa, 17.5 MPa, and 10.1 MJ/m3, respectively, for a compressive stress of 100 MPa.

Preparation of Metal-Gr Composite Coatings via Electro-Plating for High Performances: A Review

MRS Advances ◽  
2019 ◽  
Vol 4 (35) ◽  
pp. 1913-1928
Author(s):  
Sishi Li ◽  
Yanpeng Yang ◽  
Gongsheng Song ◽  
Qiang Fu ◽  
Chunxu Pan
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Large Scale ◽  
Low Cost ◽  
Composite Coatings ◽  
Scale Production ◽  
Electro Deposition ◽  
Wide Range ◽  
Set Up ◽  
Wear And Corrosion Resistance

ABSTRACTDeveloping metal-based composite coatings with improved mechanical properties and good corrosion resistance has been an attractive research topic in recent years. Graphene (Gr), as a new type of two-dimensional (2D) carbon nanomaterial with excellent physical, chemical and mechanical properties, can be used as a reinforcement to improve hardness, tensile strength, wear and corrosion resistance of metal-based composites. There have been substantial efforts focused on the fabrication of metal-Gr composite coatings via various approaches. Electro-deposition is an effective electrochemical method with wide range of advantages, such as a fast deposition rate, simple set-up with large scale production and relatively low cost. This overview covers the previous research and development studies on metal-Gr composite coatings using electro-deposition method and the resulting properties. In addition, recent work in this area which provides a developed process with industrial production perspective, is discussed.

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