Structure and properties of Cr–Al–Si–B coatings produced by pulsed electrospark deposition on a nickel alloy

Kudryashov, A. E.; Potanin, A. Yu.; Lebedev, D. N.; Сухорукова, И. В.; Shtansky, Dmitry V.; Левашов, Е. А.

doi:10.1016/j.surfcoat.2015.11.052

Cited by 32 publications

(12 citation statements)

References 20 publications

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“…The advantages of this method include the high adhesion of the resulting coatings, the possibility of local processing of large-sized parts, its relative simplicity, a low energy consumption, high environmental compatibility, and the possibility of process automation. ESD has been successfully used to produce protective coatings for nickel alloys against oxidation [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Phase Evolution and Microstructure Analysis of CoCrFeNiMo High-Entropy Alloy for Electro-Spark-Deposited Coatings for Geothermal Environment

et al. 2019

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In this work, a CoCrFeNiMo high-entropy alloy (HEA) material was prepared by the vacuum arc melting (VAM) method and used for electro-spark deposition (ESD). The purpose of this study was to investigate the phase evolution and microstructure of the CoCrFeNiMo HEA as as-cast and electro-spark-deposited (ESD) coating to assess its suitability for corrosvie environments encountered in geothermal energy production. The composition, morphology, and structure of the bulk material and the coating were analyzed using scanning electron microscopy (SEM) coupled with energy-dispersive spectroscopy (EDS), and X-ray diffraction (XRD). The hardness of the bulk material was measured to access the mechanical properties when preselecting the composition to be pursued for the ESD coating technique. For the same purpose, electrochemical corrosion tests were performed in a 3.5 wt.% NaCl solution on the bulk material. The results showed the VAM CoCrFeNiMo HEA material had high hardness (593 HV) and low corrosion rates (0.0072 mm/year), which is promising for the high wear and corrosion resistance needed in the harsh geothermal environment. The results from the phase evolution, chemical composition, and microstructural analysis showed an adherent and dense coating with the ESD technique, but with some variance in the distribution of elements in the coating. The crystal structure of the as-cast electrode CoCrFeNiMo material was identified as face centered cubic with XRD, but additional BCC and potentially σ phase was formed for the CoCrFeNiMo coating.

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Section: Introductionmentioning

confidence: 99%

Phase Evolution and Microstructure Analysis of CoCrFeNiMo High-Entropy Alloy for Electro-Spark-Deposited Coatings for Geothermal Environment

et al. 2019

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“…The advantages of this electro spark deposition include the high adhesion of the resulting coatings, the possibility of local processing of large-sized parts, its relative simplicity, low energy consumption, a high environmental compatibility, and the possibility of process automation. Electro spark deposition has been successfully used to protect nickel alloys against oxidation [ 33 , 34 , 35 ]. Novel promising coatings that would be resistant to long-term high-temperature oxidation, corrosion action, and wear are currently being sought for [ 36 ].…”

Section: Discussionmentioning

confidence: 99%

Mechanically Alloyed CoCrFeNiMo0.85 High-Entropy Alloy for Corrosion Resistance Coatings

et al. 2021

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High-entropy alloys could provide a solution for corrosion resistance due to their impressive properties. Solid-state processing of high purity Co, Cr, Fe, Ni and Mo metallic powders and consolidation resulted in a bulk material that was further machined into electro spark deposition electrodes. After the stainless steel substrate surface preparation, thin successive layers of the high-entropy alloy were deposited and Pull-Off testing was performed on the newly obtained coating, for a better understanding of the adhesion efficiency of this technique. Good adhesion of the coating to the substrate was proved by the test and no cracks or exfoliations were present. Corrosion resistance testing was performed in a liquid solution of 3.5 wt.% NaCl for 6 hours at room temperature and the results obtained validated our hypothesis that CoCrFeNiMo0.85 high-entropy alloys could provide corrosion resistance when coating a stainless steel substrate.

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“…Cu contributes to reducing the size of the grains in the layer; Aluminum increases the yield strength limit and, because of its low melting temperature, helps to increase the transfer to the substrate. Due to their good wear and corrosion resistance, Ni-C-rB-Sibased alloys are commonly used in the GFS on steels [35][36][37][38][39][40]. Essential elements in these compositions are B and Si.…”

Section: Considerations In Selecting the Composition Of The Coating Materialsmentioning

confidence: 99%

Considerations for the Selection of Materials for Electrical Spark and Gas Flame Spraying Deposition on Structural Steels

Penyashki¹,

Kandeva²,

Kostadinov³

et al. 2019

PES

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The aim of the present work is to identify and formulate the basic principles and approaches for the selection of materials for electrical spark and gas-flame stratification of structural steels. For this purpose, have been examined: -The characteristic features and physical foundations of the two methods, the changes in the composition and structure of the coating materials in the transfer process and in the formation of the coatings and the general similarities and differences.-The regularities of formation and qualitative characteristics and properties of the coatings obtained, depending on the process parameters of the coating mode and the layering material.-The interrelation between: the process parameters of the application system; the coating material; the quality characteristics, the composition, the structure of the coatings; the mechanical and the tribological properties of the coatings. The requirements for coatings have been formulated for various loads and wear cases and on this basis the requirements for the layering materials are determined by the two methods. Appropriate materials and compositions are specified for various cases of friction and wear. The main approaches to the selection of the layering materials are described.

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Structure and properties of Cr–Al–Si–B coatings produced by pulsed electrospark deposition on a nickel alloy

Cited by 32 publications

References 20 publications

Phase Evolution and Microstructure Analysis of CoCrFeNiMo High-Entropy Alloy for Electro-Spark-Deposited Coatings for Geothermal Environment

Phase Evolution and Microstructure Analysis of CoCrFeNiMo High-Entropy Alloy for Electro-Spark-Deposited Coatings for Geothermal Environment

Mechanically Alloyed CoCrFeNiMo0.85 High-Entropy Alloy for Corrosion Resistance Coatings

Considerations for the Selection of Materials for Electrical Spark and Gas Flame Spraying Deposition on Structural Steels

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