Detonation spraying of titanium and formation of coatings with spraying atmosphere-dependent phase composition

Ulianitsky, Vladimir Yu.; Dudina, Dina V.; Batraev, Igor S.; Kovalenko, A. I.; Булина, Н. В.

doi:10.1016/j.surfcoat.2014.11.038

Cited by 28 publications

(16 citation statements)

References 29 publications

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“…This results in much more difficult theoretical description of phenomena during powder propulsion and structure formation. This problem was additionally described in experimental and theoretical papers (Ref [8][9][10], where authors underlined the complexity of the technique and necessity of individual approach to the GDS spraying problem. In accordance with cited sources, for so fast and highly non-equilibrium process, it is extremely difficult to identify and describe all the phenomena shaping the spraying process and defining its results.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Dynamics and Thermal History of Fe40Al Intermetallic Powder Particles Under Gas Detonation Spraying Using Propane–Air Mixture

2019

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The dynamic properties and thermal history of Fe40Al at.% intermetallic particles have been estimated. The parameters of the gas detonation process for the investigated mixture have been calculated using thermochemical code, and the motion parameters as well as thermal history of the analyzed powder particles have been assessed using computational fluid dynamics software and self-developed algorithms. The appropriate models allowed for determination of the melted volume (mass) fraction of a certain analyzed single particle, which is dependent on a particle diameter ranging from 10 to 160 lm. The results show that only particles with a diameter lower than 80 lm melt under the investigated conditions. Moreover, the estimated radial distribution of the temperature inside the particle is almost homogenous due to relatively high FeAl thermal conductivity and relatively low thermal conductance of the surface heat transfer. The calculated final velocity of particles has been referred to some experimental and literature data from previous studies by other researchers, and the results were found to be in agreement.

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Section: Introductionmentioning

confidence: 99%

Modeling of Dynamics and Thermal History of Fe40Al Intermetallic Powder Particles Under Gas Detonation Spraying Using Propane–Air Mixture

2019

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“…Oxidation of powders during the detonation spraying process is possible over a wide range of conditions. As can be seen from examples given in Table 3, titanium sprayed at k equal to 1.1, 1.5 and 2.5 transformed into oxides; at k = 1.1, it also reacted with nitrogen and formed oxynitrides ( Figure 12) [29]. The microstructures of the coatings composed of titanium oxynitrides and oxides were similar to each other ( Figure 13).…”

Section: Oxidation By the Detonation Productsmentioning

confidence: 69%

“…In Refs. [29], we reported model investigations: titanium as a chemically active metal was detonation sprayed over a wide range of spraying conditions. The content of the reaction products can both increase and decrease with the spraying distance for different combinations of spraying parameters.…”

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

confidence: 99%

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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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“…When the oxygen fuel rate increases, the heat transferred to powders increases. 23) So, the powders impacted by higher oxygen fuel rate form the coating heated more strongly and results in decreasing the amorphous phase content of the coating by crystallization induced by residual heat. The microhardness of C1, C2 and C3 was tested to be HV 0.3 1300 « 47, HV 0.3 1200 « 55, HV 0.3 1050 « 62.…”

Section: Methodsmentioning

confidence: 99%

Effects of Oxygen Fuel Rate on Microstructure and Wear Properties of Detonation Sprayed Iron-Based Amorphous Coatings

et al. 2018

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The Fe-based (iron-based) amorphous coatings were prepared by detonation spray at various oxygen fuel rates. The microstructure and wear properties were examined. The amorphous phase contents of coatings were calculated to be 89.73%, 86.23% and 81.46%, respectively, which were higher than those fabricated by other thermal spray techniques. The porosity was tested to be 2.1%, 1.4% and 0.8%, respectively. The wear resistance of Fe-based amorphous coatings was four times better than the stainless steel substrate. The oxygen fuel rate of 1.2 m 3 /h³1.0 m 3 /h was proved to be the optimal parameter of fabricating Fe-based amorphous coating. The effects of oxygen fuel rate were discussed.

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Detonation spraying of titanium and formation of coatings with spraying atmosphere-dependent phase composition

Cited by 28 publications

References 29 publications

Modeling of Dynamics and Thermal History of Fe40Al Intermetallic Powder Particles Under Gas Detonation Spraying Using Propane–Air Mixture

Modeling of Dynamics and Thermal History of Fe40Al Intermetallic Powder Particles Under Gas Detonation Spraying Using Propane–Air Mixture

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

Effects of Oxygen Fuel Rate on Microstructure and Wear Properties of Detonation Sprayed Iron-Based Amorphous Coatings

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