Formation of thin foils of high-entropy CrFeCoNiCu alloys by EB-PVD process

Ustinov, А.I.; Поліщук, С. С.; Demchenkov, S.А.; Melnychenko, T.V.; Skorodzievskii, V.S.

doi:10.1016/j.surfcoat.2020.126440

Cited by 14 publications

(2 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the previous works, the authors [6][7][8] showed that the method of high-speed electron beam deposition allows producing thin foils from cocrfenicu hea with a rather wide range of micromechanical characteristics, high damping properties and weldability. It was also shown that at high-temperature resistance testing at the temperature of 900 °c in atmospheric air, foils from cocrfeni alloy demonstrate rather high values of high-temperature resistance due to formation of low-defect continuous scale based on cr 2 O 3 oxide on the surface [9].…”

Section: Introductionmentioning

confidence: 99%

Manufacturing honeycomb panels on the base of high-entropy CoCrFeNiSi0.2 alloy foil produced by EB-PVD method

Ustinov,

Falchenko,

Demchenkov

et al. 2023

The Paton Welding J.

Self Cite

View full text Add to dashboard Cite

The possibility of manufacturing thin foils of high-entropy alloys (HEA) of Co-Cr-Fe-Ni-Si system by the method of highspeed (up to 10 μm/min) electron beam physical-vapour deposition (EB-PVD) is shown in the work. It was established that silicon content in the alloy composition of approximately 5 wt.% improves the values of high-temperature resistance of basic CoCrFeNi HEA. It is shown that at soaking in air for 28 h at the temperature of 1000 °C the specific change in the weight of cocrfenisi 0.2 sample is not more than 0.9 mg/cm 2 . a technological scheme was proposed of manufacturing by welding three-layer thermal protection honeycomb panels with a low specific weight based on thin foils of high-entropy CoCrFeNiSi 0.2 alloy. It was found that the produced by the proposed scheme three-layer thermal protection panels can stand multiple thermal cycling from 25 to 1000 °c in air without the structure failure. the derived results can be the base for development of the technology of manufacturing lightweight honeycomb structures, capable of ensuring thermal protection of aerospace equipment elements at their interaction with the atmosphere.

show abstract

Section: Introductionmentioning

confidence: 99%

Manufacturing honeycomb panels on the base of high-entropy CoCrFeNiSi0.2 alloy foil produced by EB-PVD method

Ustinov,

Falchenko,

Demchenkov

et al. 2023

The Paton Welding J.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Because of the high energy consumption, these methods are relatively costly, so they are only used in some specific cases where the conventional method is not economically justified, e.g., formation of alloys of refractory metals (W, Mo, Ta). Physical vapor deposition (PVD) and chemical vapor deposition (CVD) methods can be also used for formation of some specific alloys, e.g., high-entropy alloys [ 4 ] or diffusion barriers [ 5 ]. Moreover, alloys may also be formed during the process of electrodeposition, which is particularly interesting if the alloy is to be used as a coating.…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition of Copper and Brass Coatings with Olive-Like Structure

et al. 2021

View full text Add to dashboard Cite

One method of creating a brass coating is through electrodeposition, which is most often completed in cyanide galvanic baths. Due to their toxicity, many investigations focused on the development of more environmentally friendly alternatives. The purpose of the study was to explore a new generation of non-aqueous cyanide-free baths based on 1-ethyl-3-methylimidazolium acetate ionic liquids. The study involved the formation of copper, zinc, and brass coatings. The influence of the bath composition, cathodic current density, and temperature was determined. The obtained coatings were characterized in terms of their morphology, chemical composition, phase composition, roughness, and corrosion resistance. It was found that the structure of the obtained coatings is strongly dependent on the process parameters. The three main structure types observed were as follows: fine-grained, porous, and olive-like. To the best knowledge of the authors, it is the first time the olive-like structure was observed in the case of an electrodeposited coating. The Cu-Zn coatings consisted of 19–96 at. % copper and exhibited relatively good corrosion resistance. A significant improvement of corrosion properties was found in the case of copper and brass coatings with the olive-like structure.

show abstract