Enhancing the properties of WC/Co detonation coatings using two-component fuels

Ulianitsky, Vladimir Yu.; Batraev, Igor S.; Dudina, Dina V.; Smurov, I.

doi:10.1016/j.surfcoat.2016.08.008

Cited by 30 publications

(11 citation statements)

References 8 publications

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“…The roughness parameter of the coatings obtained when filling barrels with 30%, 45%, 60% and 68% have the values respectively R a =12.4, 14.1, 12.4 and 12.6. When the filling volume is decreased the coating density is decreased and thus the coatings surface roughness is deteriorates [16]. Figure 4 shows the curves of the friction coefficient of NiCr/Al 2 O 3 coatings at different barrel filling volumes.…”

Section: Materials and Research Methodsmentioning

confidence: 99%

Effect of the detonation-spraying mode on the tribological properties of NiCr-Al2O3 coatings

Rakhadilov¹,

Буйткенов²,

Kabdykenova³

et al. 2021

Eurasian J. Phys. Funct. Mater.

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The article presents the study results of detonation spraying parameters on the phase composition and tribological properties of NiCr-Al2O3 powder coatings. The spraying was carried out at a ratio of the acetylene-oxygen mixture O2 /C2H2=1.856. The detonation barrel filling volume with an explosive gas mixture varied from 30% to 68%. It is determined that the phase composition of the NiCr-Al2O3 coatings varies depending on the degree of detonation barrel filling. With an increase in the detonation barrel’s filling volume, the intensity of the NiCr diffraction peaks is decreased, and the intensity of the a-Al2O3 reflexes is increased, which indicates an increase in the content of the Al2O3 phase. When low filling volume, there is determined a low coating density and uneven roughness. The tribological test results showed that with an increase in the detonation barrel filling volume, there is a decrease in the wear volume, which confirms the increase in the coatings wear resistance. Determined that the lowest friction coefficient was recorded in the sample obtained at the barrel filling volume 68%. The coatings’ high wear resistance is associated with an increase in the alpha phase volume fraction of a-Al2O3 and coatings density.

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Section: Materials and Research Methodsmentioning

confidence: 99%

Effect of the detonation-spraying mode on the tribological properties of NiCr-Al2O3 coatings

Rakhadilov¹,

Буйткенов²,

Kabdykenova³

et al. 2021

Eurasian J. Phys. Funct. Mater.

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“…Each cycle is an injection under pressure of an air-fuel mixture, which in most cases consists of acetylene (C 2 H 2 ) and oxygen (O 2 ), after mixing, the explosion is initialized by setting it on fire (spark), due to the limited space of the oxidation-reduction reaction (OVR), this mixture is detonated, and a shock wave is generated, which transfers the sprayed particles to the substrate (realized the mechanism-shock pressing). The cycle ends after the installation purges with protective gas, mainly nitrogen (N 2 ), to clear the remaining undirected particles, as well as to prevent a "blowback" in which the flying from combustion products, due to the pressure difference inside and outside the products, are sucked back, which can lead to failure and destroying of the spraying equipment [6,7].…”

Section: The Essence Process Of the Detonation Sprayingmentioning

confidence: 99%

“…The key advantage of the detonation spray method is the ability to accurately control the amount of explosive gas mixture used for each shot of the detonation gun, which allows changing the degree of thermal and chemical effects of the detonation products on the particles of the sprayed powder [3][4][5][6][7]. Depending on the composition of the acetylene-oxygen explosive mixture, the O 2 /C 2 H 2 ratio, and the nature of the gas carrier, chemical interactions may occur between the individual phases of the composite particles [8].…”

Section: The Essence Process Of the Detonation Sprayingmentioning

confidence: 99%

Obtained of powder coatings by detonation spraying

Буйткенов¹,

Rakhadilov²,

Sagdoldina³

et al. 2020

Eurasian J. Phys. Funct. Mater.

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In this work, consider the aspects of obtaining powder coatings that possessing certain working properties obtained by detonation spraying. Experimental research were carried on the effect of technological parameters of the detonation spraying process on the phase composition and properties of Ti-Si-C coatings. It is determined that when the volume of filling the detonation barrel with an explosive mixture increases to 70% in the detonation wave flow, the Ti 3 SiC 2 powder partially decomposes into TiC consequently the high-speed shock interaction of heated to high temperatures. Installed that when filling the barrel with an explosive mixture of 50% and 60%, a low extent of decomposition of Ti 3 SiC 2 powder can be achieved. It is determined that an increase in the volume content of the TiC phase in the composition of coatings bring to a decrease in the hardness of the TiC -Si coating.

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“…The gas distribution system based on fast-response electromagnetic valves provides a stable supply of working gases. Spraying modes with two-component fuels (acetylene and propane, acetylene and butane [25], Super D-Gun mode [26]) are also possible. A 3D manipulator with stepping motor drivers is an option enabling scanning of the substrate surface.…”

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

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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Enhancing the properties of WC/Co detonation coatings using two-component fuels

Cited by 30 publications

References 8 publications

Effect of the detonation-spraying mode on the tribological properties of NiCr-Al2O3 coatings

Effect of the detonation-spraying mode on the tribological properties of NiCr-Al2O3 coatings

Obtained of powder coatings by detonation spraying

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

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