Nickel Aluminides Coatings on Steel C1030 After Thermal Cycling

Khimukhin, S. N.; Eremina, Ksenia; Ri, Hosen

doi:10.1016/j.matpr.2018.12.137

Cited by 4 publications

(3 citation statements)

References 10 publications

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“…3, a Fig. 3 Experiments conducted to study the data of electric spark coatings on heat resistance [18,19] showed the necessity of using a sublayer. The role of the sublayer is to create a diffusion barrier during oxidation.…”

Section: Point Numbersmentioning

confidence: 99%

Microstructure Peculiarities of Intermetallic and Composite Coatings

Khimukhin

Eremina

2021

SSP

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Coatings were obtained by the method of electrospark deposition (ESD), using Ni-Al intermetallic alloys, steel having been used as cathodes. The structure of samples preliminarily, coated with nickel aluminides of various phase compositions (NiAl, Ni3Al), was investigated. In addition to the indicated anode materials, a complex alloyed metal matrix alloy obtained by the method of self-propagating high-temperature synthesis, was used. It was established that the coating microstructure consisted of columnar crystallites, vertically oriented to the cathode surface. X-ray microanalysis of the transverse sections showed a change in the composition of crystallites along their height. It was found that the content of the cathode components decreased from the surface of the sample to the upper part of its coating, however, the content of the anode components increased. The revealed regularities indicate the fact that the coating structure obtained at ESD, was formed through the stage of liquid-phase mixing, which explained high coating adheasion. The mechanisms of structure formation of both single-layer and two-layer coatings proved to be identical.

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Section: Point Numbersmentioning

confidence: 99%

Microstructure Peculiarities of Intermetallic and Composite Coatings

Khimukhin

Eremina

2021

SSP

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“…Therefore, intermetallic alloys based on Ni-Al system are more and more often used as anode composite materials for ESD. These alloys have high heat resistance, which is very important [10]. To obtain wear-resistant coatings it is necessary to have carbides, nitrides and borides of optimal size and shape, and of sufficient amount in the structure of the intermetallic base [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Obtaining of Metal-Matrix Alloys Based on Ni-Al for ESD Coatings Formation

Khimukhin¹,

Николенко²,

Konevtsov³

et al. 2023

MSF

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The experimental results of obtaining complex-alloyed intermetallic alloys by the method of liquid-phase self-propagating high-temperature synthesis (SHS) and their subsequent use for the formation of wear-resistant coatings by the method of electrospark deposition (ESD) are submitted. Metal oxides Cr2O3, NiO, CoO and mineral concentrate containing a larger part of ZrO2 in its composition were used as a melt charge for the SHS experiments. Alloys based on Ni-Al system dopped with Cr, Zr, Co, and C were obtained. It was established that extra addition of C led to the refinement of the alloys microstructure (3-5 times). ESD coatings were formed on steel 45 using the obtained alloys as anode material. The coatings formed by using the alloys doped by Co, Zr, Cr and extra addition of C (0.4 wt%) proved to be maximum wear resistant.

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“…Such alloys are known to be widely used for the producing turbine blades for high-temperature stages of gas turbine plants (GTP). So the alloys of Ni-Al system can also be used as heat-resistant coatings on the turbine blades of the low-temperature GTP stages, which are made of stainless steel (AISI 420), thus improving their heat and wear resistant properties [5]. However, there is a problem caused by low ductility of the alloys of Ni-Al system (especially the NiAl phase) [6] and the increased roughness of the ESD coatings.…”

Section: Introductionmentioning

confidence: 99%

Obtaining of Coatings from Ni-Al by Electro Spark Deposition and Surface Smoothing by Ultrasonic Plastic Deformation

Khimukhin¹,

Eremina²,

Николенко³

2021

MSF

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The article presents the research results on obtaining coatings on steels 1030 and AISI 420 by the method of electrospark deposition and subsequent smoothing by means of ultrasonic surface plastic deformation (USPD). Intermetallic alloys consisting mainly of NiAl and Ni3Al phases were used as materials for obtaining coatings. It was found that the coatings consist of columnar crystallites of complex composition and have high plastic properties. To ensure the minimum parameters of the surface roughness of the obtained coatings, it is necessary to carry out 3-6 times of ultrasonic surface treatment.

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Nickel Aluminides Coatings on Steel C1030 After Thermal Cycling

Cited by 4 publications

References 10 publications

Microstructure Peculiarities of Intermetallic and Composite Coatings

Microstructure Peculiarities of Intermetallic and Composite Coatings

Obtaining of Metal-Matrix Alloys Based on Ni-Al for ESD Coatings Formation

Obtaining of Coatings from Ni-Al by Electro Spark Deposition and Surface Smoothing by Ultrasonic Plastic Deformation

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