Possibilities of the Computer-Controlled Detonation Spraying method: A chemistry viewpoint

Dudina, Dina V.; Batraev, Igor S.; Ulianitsky, Vladimir Yu.; Корчагин, М. А.

doi:10.1016/j.ceramint.2013.09.111

Cited by 29 publications

(21 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Coatings formed at explosive charges of 55-70% contain as little as 1 wt.% of the crystalline phase. At an O 2 /C 2 H 2 molar ratio of 1.1:1, the detonation products have a reducing character containing 58% of carbon monoxide CO and 22% of atomic hydrogen [23]. Under these conditions, no oxidation of the sprayed particles can take place [23].…”

Section: Resultsmentioning

confidence: 99%

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

Kuchumova

Batraev

Ulianitsky

et al. 2019

Metals

Self Cite

View full text Add to dashboard Cite

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).

show abstract

Section: Resultsmentioning

confidence: 99%

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

Kuchumova

Batraev

Ulianitsky

et al. 2019

Metals

Self Cite

View full text Add to dashboard Cite

show abstract

“…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%

“…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%

“…Generally, the controlled technological conditions of the GDS process ensure the formation of a coating structure with negligible oxidation of grains and porosity of less than 0.5%, which translates into very high adhesive strength with the metal substrate (retained to a very high temperature range of up to 750°C) ( Ref 18,32,33). However, the high aluminum content in Fe-Al type powders deposited on structural steel is prone to oxidation during the GDS process, which may change the composition and microstructure of the coatings, resulting in the formation of oxide ceramics (Ref 18,22).…”

Section: Introductionmentioning

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%

See 2 more Smart Citations

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

Senderowski

2014

J Therm Spray Tech

View full text Add to dashboard Cite

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.

show abstract

Formation of metal composites by detonation spray of powder mixtures

Ulianitsky

Rybin

Sova

et al. 2021

Int J Adv Manuf Technol

Self Cite

View full text Add to dashboard Cite

The feasibility study of elaboration of metal composite coatings by detonation spray using the blends of iron, nickel, copper, cobalt, and aluminum powders was performed using different spray modes. The numerical simulation of particle parameters showed that the particles formed the coating in solid, semi-molten, or molten state depending on the spraying modes, particle material, and particle size. It was shown that successful formation of the coating containing all powder mixture components could be achieved in case of proper optimization of spraying parameters. Obtained Fe-Co-Ni, Fe-Co-Ni-Cu, and Fe-Co-Ni-Cu-Al coatings had the uniform lamellae structure. However, the composition of the coatings differed from the initial powder mixture composition due to different deposition efficiencies of the powders. It was also found the mutual influence of blend components on bonding. In particular, the deposition efficiency of iron particles was probably affected by copper.

show abstract

Possibilities of the Computer-Controlled Detonation Spraying method: A chemistry viewpoint

Cited by 29 publications

References 19 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

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

Formation of metal composites by detonation spray of powder mixtures

Contact Info

Product

Resources

About