scholarly journals PROCESSES AND TECHNOLOGIES OF COLD GAS DYNAMIC SPRAYING OF AGRICULTURAL EQUIPMENT

2021 ◽  
pp. 4-14
Author(s):  
Nataliia Veselovska ◽  
Oleg Gaidamak ◽  
Mykhailo Karpiichuk ◽  
Jylia Kucherenko
Keyword(s):  
New Technology ◽  
Industrial Applications ◽  
Cold Gas Dynamic Spraying ◽  
Powder Materials ◽  
Functional Coatings ◽  
Gas Dynamic ◽  
Electrical Conductivities ◽  
Coating Formation ◽  
Laval Nozzles ◽  
Cold Gas

The article is devoted to the technology of cold gas-dynamic spraying - a relatively new technology for creating functional coatings in which narrowed-expanding nozzles (De Laval nozzles) are used, in which solid powders are sprayed at or close to supersonic speed in the direction of the substrate, where they plastically deform and adhere. Cold gas dynamic spraying is an innovative process that has received widespread scientific interest and industrial applications in the automotive, aerospace and biotechnology industries in recent years. Spraying various powder materials in this way provides protection against corrosion and can increase the mechanical strength and wear resistance of details. With that method it is possible to create functional coatings with different thermal conductivities and electrical conductivities, which can be used as insulation materials, conducting and isolation surface layers of parts, coatings for controlling gaps, restoring and repairing details. The article discusses modern developments in the field of experimental analysis of technologies and processes of cold gas-dynamic spraying, the systems of cold gas-dynamic spraying and coating formation are determined and the parameters and principles of the process are described. The installation for spraying surfaces developed at VNAU is presented and researches and the analysis of possibility of use of a method of a cold gas-dynamic spraying for restoration of details of autotractor equipment of agricultural purpose are carried out.

scholarly journals A comparative review on cold gas dynamic spraying processes and technologies

2019 ◽  
Vol 6 ◽  
pp. 25 ◽  
Author(s):  
Sunday Temitope Oyinbo ◽  
Tien-Chien Jen
Keyword(s):  
New Technology ◽  
Cold Spraying ◽  
Industrial Applications ◽  
Cold Gas Dynamic Spraying ◽  
Future Research ◽  
Gas Dynamic ◽  
Comparative Review ◽  
Wide Range ◽  
High Fatigue ◽  
Cold Gas

Cold gas dynamic spraying (CGDS) is a relatively new technology of cold spraying techniques that uses converging-diverging (De Laval) nozzle at a supersonic velocity to accelerate different solid powders towards a substrate where it plastically deforms on the substrate. This deformation results in adhesion to the surface. Several materials with viable deposition capability have been processed through cold spraying, including metals, ceramics, composite materials, and polymers, thereby creating a wide range of opportunities towards harnessing various properties. CGDS is one of the innovative cold spraying processes with fast-growing scientific interests and industrial applications in the field of aerospace, automotive and biotechnology, over the past years. Cold gas spraying with a wide range of materials offers corrosion protection and results in increases in mechanical durability and wear resistance. It creates components with different thermal and electrical conductivities than that substrates would yield, or produces coatings on the substrate components as thermal insulators and high fatigue-strength coatings, and for clearance control, restoration and repairing, or prostheses with improved wear, and produces components with attractive appearances. This review extensively exploits the latest developments in the experimental analysis of CGDS processes. Cold gas dynamic spraying system, coating formation and deposit development, description of process parameter and principles, are summarized. Industrial applications and prospectives of CGDS in future research are also commented.

Formation of Intermetallic Phases in Functional Coatings Prepared by Cold Gas-Dynamic Spraying

2020 ◽  
Vol 62 (1-2) ◽  
pp. 90-94
Author(s):  
D. A. Gerashchenkov ◽  
A. Yu. Askinazi ◽  
M. L. Fedoseev ◽  
E. Yu. Gerashchenkova ◽  
A. M. Makarov
Keyword(s):  
Intermetallic Phases ◽  
Cold Gas Dynamic Spraying ◽  
Functional Coatings ◽  
Gas Dynamic ◽  
Cold Gas

Study of a hardened multilayer coating obtained by the cold gas-dynamic spraying with laser intensification

2020 ◽  
Vol 86 (7) ◽  
pp. 33-38
Author(s):  
A. I. Gorunov
Keyword(s):  
Multilayer Coating ◽  
Hardened Layer ◽  
Cold Gas Dynamic Spraying ◽  
Carbide Powder ◽  
Multilayer Coatings ◽  
Powder Materials ◽  
Layer By Layer ◽  
Gas Dynamic ◽  
Powder Particles ◽  
Cold Gas

When reconstructing products obtained using additive technologies based on layer-by-layer melting of metal powder by concentrated energy flows, it is advisable to use methods that minimize melting of the initial powder and reduce structural heterogeneity of the material. Cold gas-dynamic spraying with laser-induced intensification of the process (CGDSL) is one of them. The multilayer coatings obtained by the CGDSL method have a homogeneous metal structure though a significant surface roughness attributed to the particle size of the original powder is observed. The goal of the study is to develop a new method of post-processing of multilayer coatings obtained by CGDSL which can provide a hardened layer on their surface. A hardened layer is formed through introduction of boron carbide powder particles into the laser-molten region formed on the surface of the coating based on 316L stainless steel. An acoustic wave triggered by a «microexplosion» induced by a laser pulse above the surface pushes carbide particles in different directions. Some of them are embedded into the melt pool on the surface of the coating. Thus, the laser microdetonation cartooning of the surface of the CGDSL coating is implemeted. Study of the hardened layer revealed a high content of B, C, Cr, Fe, and Ni. Moreover, it is shown that solid carbides of rhombic form are formed in the hardened layer. Chemical and elemental analyzes showed that diamond-shaped carbides — carbides of the type (Fe, Cr)xBy — contain a high concentration of Cr, Fe and a relatively small percentage of C. Most likely formation of diamond-shaped carbides occurs due to interaction of chromium which is a part of the initial hardened coating with boron that released from the surface of BC particles under laser impact. The developed method provides hardening of the surface layer of the coating previously obtained by CGDSL by embedding the BC powder particles into the surface. The technology of hardening CGDSL coatings can be implemented using other powder materials.

Technological Aspects of Obtaining Functional Coatings Based on Silver by the Method of Cold Gas-Dynamic Spraying

2019 ◽  
Vol 822 ◽  
pp. 774-780
Author(s):  
A.D. Bykova ◽  
B.V. Farmakovsky ◽  
M.A. Markov ◽  
A.N. Belyakov ◽  
A.M. Makarov ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Cold Gas Dynamic Spraying ◽  
Functional Coatings ◽  
Gas Dynamic ◽  
Cold Gas

In the article, the authors examined the technological aspects of obtaining a functional alloy based on silver alloyed with chromium, zirconium, rhenium and rare earth elements (cerium, lanthanum, yttrium). A technology has been developed for producing powder from this alloy and nanostructured functional coatings based on it using the method of cold gas-dynamic spraying.

scholarly journals Processes and technologies of cold gas dynamic spraying of products agricultural equipment

2021 ◽  
Vol 5 (3) ◽  
Author(s):  
Iryna Dobrova
Keyword(s):  
Animal Husbandry ◽  
Cold Gas Dynamic Spraying ◽  
Urgent Problem ◽  
Livestock Waste ◽  
Functional Coatings ◽  
Processing Industry ◽  
Agricultural Equipment ◽  
Gas Dynamic ◽  
Processed Products ◽  
Cold Gas

Modern equipment of processing industry, animal husbandry, bioenergy complexes is used for processing, storage or transportation of aggressive substances. Functional coatings made of inert materials do not enter into any chemical reactions with food, processed products, livestock waste, acids and other aggressive media. There is a question of protection of the equipment of the processing industry, animal husbandry, bioenergy complexes from aggressive environments by application of processes of a cold gas-dynamic spraying. This is an urgent problem for the development of protective technologies and appropriate equipment for the implementation of the process of creating functional coatings

Optimization of the coating process by cold gas dynamic spraying applied to production conditions of Ni–Ti and Ni–Al systems

2020 ◽  
pp. 108-116
Author(s):  
A. M. Makarov ◽  
V. R. Nikitina ◽  
D. A. Gerashchenkov ◽  
A. F. Vasiliev
Keyword(s):  
Nickel Titanium ◽  
Cold Gas Dynamic Spraying ◽  
Production Environment ◽  
Functional Coatings ◽  
Gas Dynamic ◽  
High Adhesion ◽  
Mechanical Mixtures ◽  
Practical Recommendations ◽  
Production Conditions ◽  
Cold Gas

This study developed practical recommendations for using the method of cold gas dynamic spraying to obtain functional coatings in a production environment using powders of nickel, titanium and aluminum of the grades: PNE-1 (Ni), PTOM-1 (Ti) and PA-VCh (Al). The temperature and speed parameters of the process were optimized using mechanical mixtures (Ni + Ti) and (Ni + Al) as an example. High adhesion of the coating and coefficient of powder use were ensured with maximum productivity at the DIMET-403 installation.

scholarly journals Microstructural Studies of the Copper-Based Coating Obtained by Cold Gas-Dynamic Spraying for the Restoration of Worn-Out Contact Wires

Coatings ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1067
Author(s):  
Sergey Grigoriev ◽  
Eugeniy Gershman ◽  
Iosif Gershman ◽  
Alexander Mironov ◽  
Pavel Podrabinnik
Keyword(s):  
Electrical Conductivity ◽  
Adhesion Strength ◽  
Substrate Surface ◽  
Copper Substrate ◽  
Cold Gas Dynamic Spraying ◽  
Gas Dynamic ◽  
Coating Formation ◽  
The Relationship ◽  
Microstructural Studies ◽  
Cold Gas

The microstructure of the coating obtained by cold gas-dynamic spraying was investigated. A Cu-Al2O3-Zn powder blend was sprayed onto a copper substrate to restore a worn copper contact wire. The coating thickness was 1–2.5 mm. Mechanisms of coating formation are discussed on the basis of microstructure studies. The relationship between the microstructure and the properties of the coating such as adhesion strength and electrical conductivity is shown. Improved adhesion strength was achieved through substrate surface preprocessing with coarse Al2O3 particles.

scholarly journals Modern processes and technologies of cold gas dynamic spraying of products agricultural equipment

2021 ◽  
Author(s):  
N. Veselovska ◽  
R. Iskovich-Lototsky
Keyword(s):  
Animal Husbandry ◽  
Cold Gas Dynamic Spraying ◽  
Urgent Problem ◽  
Livestock Waste ◽  
Functional Coatings ◽  
Processing Industry ◽  
Agricultural Equipment ◽  
Gas Dynamic ◽  
Processed Products ◽  
Cold Gas

Modern equipment of processing industry, animal husbandry, bioenergy complexes is used for processing, storage or transportation of aggressive substances. Functional coatings made of inert materials do not enter into any chemical reactions with food, processed products, livestock waste, acids and other aggressive media. There is a question of protection of the equipment of the processing industry, animal husbandry, bioenergy complexes from aggressive environments by application of processes of a cold gas-dynamic spraying. This is an urgent problem for the development of protective technologies and appropriate equipment for the implementation of the process of creating functional coatings

Development of an alloy in the tellurium - copper - cerium system for manufacturing functional coatings for photocathodes of photoelectronic devices

2021 ◽  
pp. 113-116
Author(s):  
A. F. Vasiliev ◽  
E. L. Gyulikhandanov ◽  
E. A. Samodelkin ◽  
B. V. Farmakovsky
Keyword(s):  
Spectral Region ◽  
Cold Gas Dynamic Spraying ◽  
Functional Coatings ◽  
Gas Dynamic ◽  
Cold Gas

This paper presents the results on the development of an alloy in the tellurium - copper - cerium system used for the manufacture of functional coatings using the technologies of supersonic cold gas-dynamic spraying. Coatings from the specified alloy are used for the manufacture of photocathodes of photoelectronic devices operating in the UV spectral region.

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