Calculation of detonation gas spraying

Gavrilenko, T. P.; Nikolaev, Yu. A.

doi:10.1007/s10573-007-0098-y

Cited by 28 publications

(11 citation statements)

References 6 publications

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“…The temperatures and velocities of the particles at the exit of the barrel were calculated using LIH software (LIH SB RAS, Novosibirsk. Russia) developed based on the analysis presented in [22].…”

Section: Methodsmentioning

confidence: 99%

Formation of Metallic Glass Coatings by Detonation Spraying of a Fe66Cr10Nb5B19 Powder

Kuchumova

Batraev

Ulianitsky

et al. 2019

Metals

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The present work was aimed to demonstrate the possibility of forming Fe66Cr10Nb5B19 metallic glass coatings by detonation spraying and analyze the coating formation process. A partially amorphous Fe66Cr10Nb5B19 powder with particles ranging from 45 µm to 74 µm in diameter was used to deposit coatings on stainless steel substrates. The deposition process was studied for different explosive charges (fractions of the barrel volume filled with an explosive mixture (C2H2 + 1.1O2)). As the explosive charge was increased from 35% to 55%, the content of the crystalline phase in the coatings, as determined from the X-ray diffraction patterns, decreased. Coatings formed at explosive charges of 55–70% contained as little as 1 wt.% of the crystalline phase. In these coatings, nanocrystals in a metallic glass matrix were only rarely found; their presence was confined to some inter-splat boundaries. The particle velocities and temperatures at the exit of the barrel were calculated using a previously developed model. The particle temperatures increased as the explosive charge was increased from 35% to 70%; the particle velocities passed through maxima. The coatings acquire an amorphous structure as the molten particles rapidly solidify on the substrate; cooling rates of the splats were estimated. The Fe66Cr10Nb5B19 metallic glass coatings obtained at explosive changes of 55–60% showed low porosity (0.5–2.5%), high hardness (715–1025 HV), and high bonding strength to the substrate (150 MPa).

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Section: Methodsmentioning

confidence: 99%

Formation of Metallic Glass Coatings by Detonation Spraying of a Fe66Cr10Nb5B19 Powder

Kuchumova

Batraev

Ulianitsky

et al. 2019

Metals

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“…Methods of calculation of coefficients a i are based on the theory of gas detonation described in Refs. [3,19,27] and references therein. The detonation products can possess a very high oxidizing activity due to the presence of atomic oxygen.…”

Section: Computer-controlled Detonation Spraying (Ccds): Advanced Facmentioning

confidence: 99%

“…The calculation method developed in Ref. [27] is based on determining the parameters of the detonation products, which are further used to calculate the temperatures and velocities of the particles. In order to demonstrate the capabilities of this method, below we present calculation results for copper, which we selected as a convenient model system.…”

Section: Particle Temperatures and Velocities: Measurements And Calcumentioning

confidence: 99%

Computer-Controlled Detonation Spraying: Flexible Control of the Coating Chemistry and Microstructure

Ulianitsky

Dudina

Штерцер

et al. 2019

Metals

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This article is a focused review aimed to describe the potential of the computer-controlled detonation spraying (CCDS) for producing and designing coatings with variable chemical and phase compositions and microstructure and promising properties. The development of the detonation spraying method is briefly analyzed from a historical perspective and the capabilities of the state-of-the art facilities are presented. A key advantage of the CCDS is the possibility of using precisely measured quantities of the explosive gaseous mixtures for each shot of the detonation gun and different oxygen to fuel ratios, which can create spraying environments of different chemical properties—from severely oxidizing to highly reducing. The significance of careful adjustment of the spraying parameters is shown using material systems that are chemically sensitive to the composition of the spraying environment and temperature. Research performed by the authors on CCDS of different materials—metals, ceramics, intermetallics and metal-ceramic composites is reviewed. Novel applications of detonation spraying using the CCDS technology are described.

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“…However, by applying the Reynolds or Favre averaging, these equations can be simplified in such a way that the small-scale turbulent fluctuations do not have to be directly simulated, and consequently, the computational load can be significantly reduced. For D-gun, either 1-D (Kadyrov and Kadyrov, 1995) or 2-D models (Gavrilenko and Yu, 2007) are used with or without corrections for supersonic velocities. In most cases, the 2-D model of gas dynamics is implemented into commercial CFD softwares (e.g., ANSYS Fluent) and is solved by finite-volume method (Li and Christofides, 2005;Srivatsan and Dolatabadi, 2006).…”

Section: High-energy Gasesmentioning

confidence: 99%

Current status and future directions of thermal spray coatings and techniques

Fauchais¹

2015

Future Development of Thermal Spray Coatings

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Calculation of detonation gas spraying

Cited by 28 publications

References 6 publications

Formation of Metallic Glass Coatings by Detonation Spraying of a Fe66Cr10Nb5B19 Powder

Formation of Metallic Glass Coatings by Detonation Spraying of a Fe66Cr10Nb5B19 Powder

Computer-Controlled Detonation Spraying: Flexible Control of the Coating Chemistry and Microstructure

Current status and future directions of thermal spray coatings and techniques

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