Obtained of powder coatings by detonation spraying

Буйткенов, Д.Б.; Rakhadilov, Bauyrzhan; Sagdoldina, Zhuldyz; Maulet, M.

doi:10.29317/ejpfm.2020040306

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…To achieve gradient coatings, the barrel's gas fill volume was progressively reduced from 50% to 25%. A detailed methodology for creating a gradient coating is elaborated upon in the earlier study (Rakhadilov et al, 2021;Buitkenov et al, 2020). The specific parameters used for the coating process can be found in Table 1.…”

Section: Research Methods and Materialsmentioning

confidence: 99%

Impact of aluminum content upon the microstructure of Ni-Cr-Al gradient coatings

Meruyert,

Wieleba

2023

Materials of International Practical Internet Conference “Challenges of Science”

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Studied the aluminium concentration in the composite powder NiCr-Al influences the structure of NiCr-Al gradient coatings. Gradient coatings based on NiCr-Al were obtained by detonation spraying, with a phased reduction in the barrel filling volume with acetylene-oxygen gas mixture from 50% to 25%. The coatings' microstructure was analyzed across different aluminum concentrations: 15%, 20%, and 30%. By adjusting the aluminum concentration in the powder mix, we achieved coatings with a gradient formation. The findings indicated that the phase composition of the gradient coating is significantly influenced by the Al mass percentage. The findings suggest a powder composition of 80%NiCr and 20%Al to produce NiCr-Al coatings with a good gradient structure.

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Section: Research Methods and Materialsmentioning

confidence: 99%

Impact of aluminum content upon the microstructure of Ni-Cr-Al gradient coatings

Meruyert,

Wieleba

2023

Materials of International Practical Internet Conference “Challenges of Science”

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“…The coating was obtained on the CCDS 2000 detonation unit [14][15]. Oxygen-acetylene mixtures of O 2 /C 2 H 2 = 1.856 were used as explosive gas and nitrogen as a carrier gas.…”

Section: Methodsmentioning

confidence: 99%

Influence of the content of aluminum on the structure of gradient detonation coatings based on NiCr-Al

Maulet¹,

Sagdoldina²,

Rakhadilov³

et al. 2022

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This paper studies the effects of aluminium content in the composite powder on the structure of detonation gradient coatings based on NiCr-Al. Gradient coatings were obtained by detonation spraying with a gradual stepwise decrease in the barrel filling volume with an acetylene-oxygen gas mixture from 50% to 25%. The elemental and phase composition, microstructure and surface roughness of coatings based on NiCr-Al with different aluminium content of 15%, 20%, and 30% were investigated. By varying the aluminium content in the powder composition, coatings with a gradient structure were obtained. The study results showed that the phase composition of the gradient coating strongly depends on the mass fraction of Al. In the case of an aluminium content of 30% in the composition of the composite powder, the formation of aluminium oxide was detected. It is established that under the same detonation deposition modes, the formation of the gradient structure of coatings will strongly depend on the aluminium content in the NiCr-Al composition. The study results showed that the optimal composition of the powder is NiCr – 80% and Al – 20% to obtain NiCr-Al coatings with a gradient structure.

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Development of Method for Applying Multilayer Gradient Thermal Protective Coatings Using Detonation Spraying

Buitkenov,

Nabioldina,

Raisov

2024

Coatings

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In this work, multilayer gradient coatings obtained by detonation spraying were studied. To obtain a multilayer gradient coating by detonation spraying, two modes with different numbers of shots of NiCrAlY and YSZ were developed. The presented results demonstrate the effectiveness of creating a gradient structure in coatings, ensuring a smooth transition from metal to ceramic materials. Morphological analysis of the coatings confirmed a layered gradient structure, consisting of a lower metallic (NiCrAlY) layer and an upper ceramic (YSZ) layer. The variation in the contents of elements along the thickness of the coatings indicates the formation of a gradient structure. X-ray analysis shows that all peaks in the X-ray diffraction patterns correspond to a single ZrO2 phase, indicating the formation of a non-transformable tetragonal primary (t′) phase characteristic of the thermal protective coatings. This phase is known for its stability and resistance to phase transformation under changing operating temperature conditions. As the thickness of the coatings increased, an improvement in their mechanical characteristics was found, such as a decrease in the coefficient of friction, an increase in hardness, and an increase in surface roughness. These properties make such coatings more resistant to mechanical wear, especially under sliding conditions, which confirms their prospects for use in a variety of engineering applications, including aerospace and power generation.

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Obtained of powder coatings by detonation spraying

Cited by 3 publications

References 12 publications

Impact of aluminum content upon the microstructure of Ni-Cr-Al gradient coatings

Impact of aluminum content upon the microstructure of Ni-Cr-Al gradient coatings

Influence of the content of aluminum on the structure of gradient detonation coatings based on NiCr-Al

Development of Method for Applying Multilayer Gradient Thermal Protective Coatings Using Detonation Spraying

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