Computer-Controlled Detonation Spraying: From Process Fundamentals Toward Advanced Applications

Ulianitsky, Vladimir Yu.; Штерцер, А. А.; Zlobin, Sergey B.; Smurov, I.

doi:10.1007/s11666-011-9649-6

Cited by 112 publications

(60 citation statements)

References 31 publications

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“…The deposition of the coatings onto titanium substrates was carried out using a computer controlled detonation spraying (CCDS2000) facility (Lavrentyev Institute of Hydrodynamics SB RAS, Novosibirsk, Russia) [23]. The substrates were sand-blasted before depositing the coating layers.…”

Section: Methodsmentioning

confidence: 99%

Mechanical Characterization of Composite Coatings Formed by Reactive Detonation Spraying of Titanium

Panin

Власов

Dudina

et al. 2017

Metals

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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 O 2 /C 2 H 2 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 in the coatings was evaluated. It was found that the composition of the strengthening phases in the coatings depends on the O 2 /C 2 H 2 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. The strength of the coatings was determined through the microhardness measurements and local characterization of the phases via nanoindentation. Three-point bending tests were employed in order to evaluate the crack resistance of the coatings. The strengthening mechanisms of the coatings by oxide or carbonitride phases were discussed.

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Section: Methodsmentioning

confidence: 99%

Mechanical Characterization of Composite Coatings Formed by Reactive Detonation Spraying of Titanium

Panin

Власов

Dudina

et al. 2017

Metals

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“…Based on the aluminum content, the matrix can acquire various phases such as the FeAl phase mixed with aluminum ferrite (29)(30)(31)(32)(33)(34) In addition, the presence of Al 2 O 3 oxide impacts on the final properties of the self-decomposing powder, creating a composite structure of the powder material. The verification of the phase structure of the self-decomposing powder in the initial state (as-received from the manufacturer) and also after 20 h of milling (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Oxides are formed during the GDS process, in the stage when the detonation wave propagates through the powder particles, which involves rapid chemical reactions accompanied by the release of a large amount of thermal energy (Ref [18][19][20][21][22][23][30][31][32]. However, despite the high velocity of the detonation wave, the powder particles can partially melt at their surfaces and then quickly oxidize due to the high concentration of free radicals, eventually solidifying on their approach to the substrate ( Ref 28,29,32).…”

Section: Introductionmentioning

confidence: 99%

Nanocomposite Fe-Al Intermetallic Coating Obtained by Gas Detonation Spraying of Milled Self-Decomposing Powder

Senderowski

2014

J Therm Spray Tech

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The nanocomposite structure of Fe-Al intermetallic coating, created in situ during gas detonation spraying (GDS) of as-milled self-decomposing powder and containing disordered 8 nm FeAl nanocrystals, was analyzed using scanning electron microscopy (SEM) with energy-dispersive x-ray (EDX) spectroscopy, transmission electron microscopy (TEM), selected-area electron diffraction (SAED), and x-ray diffraction methods. It is found that the Fe-Al coating is characterized by a sublayer morphology consisting of flattened and partially melted splats containing a wide Al range from about 26 to 52 at.%, as well as Al 2 O 3 oxides, created in situ at the internal interfaces of splats during the GDS process. The complex oxide films, identified as amorphous Al 2 O 3 , which are formed in the nanocrystalline Fe-Al matrix of the GDS coating behave like a composite reinforcement in the intermetallic Fe-Al coating. The combined presence of nanosized subgrains in the Fe-Al matrix and the Al 2 O 3 nanoceramic dispersoids significantly increases the microhardness of the coating.

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“…Intensive development of the detonation gas spraying method, [1][2][3][4][5] lead to significant innovation of the mentioned technology and to its practical use in the industry. First of all, it should be emphasized that the method is applicable to protective coating formation, [1].…”

Section: Detonation Gas Spraying Methodsmentioning

confidence: 99%

“…The analysis of heat transfer during the detonation and particles motion allowed to control the settlement of the particles on the substrate, [4]. Usually, the computer adding control of heat transfer promoted the further development of the gas detonation method, [5].…”

Section: Detonation Gas Spraying Methodsmentioning

confidence: 99%

Solidification Mechanism of the D-Gun Sprayed Fe-Al Particles

Wołczyński¹,

Senderowski²,

Fikus³

et al. 2017

Archives of Metallurgy and Materials

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The detonation gas spraying method is used to study solidification of the Fe-40Al particles after the D-gun spraying and settled on the water surface. The solidification is divided into two stages. First, the particle solid shell forms during the particle contact with the surrounding air / gas. Usually, the remaining liquid particle core is dispersed into many droplets of different diameter. A single Fe-Al particle is described as a body subjected to a rotation and finally to a centrifugal force leading to segregation of iron and aluminum. The mentioned liquid droplets are treated as some spheres rotated freely / chaotically inside the solid shell of the particle and also are subjected to the centrifugal force. The centrifugal force, and first of all, the impact of the particles onto the water surface promote a tendency for making punctures in the particles shell. The droplets try to desert / abandon the mother-particles through these punctures. Some experimental evidences for this phenomenon are delivered. It is concluded that the intensity of the mentioned phenomenon depends on a given droplet momentum. The droplets solidify rapidly during their settlement onto the water surface at the second stage of the process under consideration. A model for the solidification mechanism is delivered.

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Computer-Controlled Detonation Spraying: From Process Fundamentals Toward Advanced Applications

Cited by 112 publications

References 31 publications

Mechanical Characterization of Composite Coatings Formed by Reactive Detonation Spraying of Titanium

Mechanical Characterization of Composite Coatings Formed by Reactive Detonation Spraying of Titanium

Nanocomposite Fe-Al Intermetallic Coating Obtained by Gas Detonation Spraying of Milled Self-Decomposing Powder

Solidification Mechanism of the D-Gun Sprayed Fe-Al Particles

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