Magnetron Sputtering High-Entropy Alloy Coatings: A Mini-Review

Padamata, Sai Krishna; Yasinskiy, Andrey; Yanov, V. V.; Sævarsdóttir, Guðrún

doi:10.3390/met12020319

Cited by 34 publications

(13 citation statements)

References 64 publications

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“…In recent years, researchers have expressed a strong interest in using high-entropy coatings in protective applications. Some common techniques used for depositing high-entropy coatings include physical vapor deposition (PVD), [54][55][56] chemical vapor deposition (CVD), [57] laser cladding, [58][59][60] electrochemical deposition, [61][62][63] and various spray-based methods. [64][65][66] Among these techniques, PVD is one of the most favored methods for depositing high-entropy coatings due to the multiple possibilities to modify also their growth morphology (e.g., nanograined, nanocomposite, superlattice), to develop dense and uniform structures with excellent adhesion to the substrate.…”

Section: Introductionmentioning

confidence: 99%

Atomic Radius Mismatch: A Key Parameter for Design and Synthesis of High‐Entropy Physical Vapor Deposition Coatings—Review

Lotfi‐Khojasteh,

Elmkhah,

Nouri

et al. 2024

Adv Eng Mater

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High‐entropy metal sublattice coatings (HESCs) prepared by physical vapor deposition (PVD) have received attention due to their diverse range of properties and applications. One of the most critical requirements for their synthesis is the prediction and control of their wide‐spread properties, and several efforts have been undertaken using various thermodynamical parameters. The majority of these predictions concentrate on high‐entropy alloys (HEAs) while high‐entropy ceramics (HECs) received little attention. One of the most important parameters to control the structure and properties of HEAs is their atomic radius mismatch (δr), which we apply to crystalline, amorphous, and composite (amorphous matrix, crystalline matrix, and multilayer) HESCs. Based on the relationships between δr and structure, mixing enthalpy (ΔHmix), electronegativity difference (Δχ), ion bonding percentage (IBPHE), mechanical properties (including hardness, H, and Young’s modulus, E), and wear performance descriptors (H/E and H3/E2 ratios) we provide a δr‐based map to aid the design and selection of elements for HESCs.This article is protected by copyright. All rights reserved.

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Section: Introductionmentioning

confidence: 99%

Atomic Radius Mismatch: A Key Parameter for Design and Synthesis of High‐Entropy Physical Vapor Deposition Coatings—Review

Lotfi‐Khojasteh,

Elmkhah,

Nouri

et al. 2024

Adv Eng Mater

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“…Due to the element content of HEA being much higher than that of traditional engineering alloys, block HEAs have not been applied on a large scale in the industrial field due to cost constraints. As a coating material, HEAs not only offer advantages of excellent corrosion resistance [22][23][24], wear resistance [25,26], and oxidation resistance [27], but also overcome the disadvantages of high engineering application costs, which is the primary direction of the development of HEAs. In addition, HEAs have certain requirements for the cooling speed and undercooling degree in the preparation process, and the coating has the characteristics of fast cooling due to the small forming scale, which can effectively inhibit the generation of intermetallic compounds during the forming [28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Microstructures, Corrosion Resistance and Wear Resistance of High-Entropy Alloys Coatings with Various Compositions Prepared by Laser Cladding: A Review

Zhu

Guo

et al. 2022

Coatings

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Nowadays, high-entropy alloys (HEAs) have become a hot research topic in the field of coating materials. However, HEAs have a large wide range of compositional systems, and the differences in their composition inevitably lead to the significant variations in the matching process parameters of laser cladding and post-treatment methods, which in turn give the coatings a broad range of microstructures and protective properties. Therefore, it is crucial to review and summarize the research progresses on laser cladding HEA coatings to provide a reference for obtaining high-performance HEA coatings and further expand the application of HEA coatings. This work describes the working mechanism of laser cladding and illustrates the advantages and drawbacks of laser cladding in detail. The effects of the addition of alloying elements, process parameters and post-treatment techniques on the microstructures and properties of the coatings are thoroughly reviewed and analyzed. In addition, the correlations between the chemical compositions of HEAs, process parameters of laser cladding, post-treatment techniques and the microstructure and protective properties of the coatings are investigated and summarized. On this basis, the future development direction of HEA coatings is outlined.

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“…The application of HEAs as coating materials is a major direction for the development of HEAs. Intermetallic compounds are easily produced during the preparation of HEAs due to the slow cooling rate, which affects the alloy properties, while the coating is capable of rapid cooling due to its low thickness, thus facilitating the acquisition of higher-quality alloys [24][25][26][27][28][29][30]. Currently, the most commonly used method to prepare HEA coatings is the laser melting technique, but the heat input of laser melting is high and prone to defects such as microcracks and porosity.…”

Section: Introductionmentioning

confidence: 99%

Progress on New Preparation Methods, Microstructures, and Protective Properties of High-Entropy Alloy Coatings

Zhu

et al. 2022

Coatings

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Currently, the preparations of high-entropy alloy (HEA) coatings have developed into new methods such as thermal spraying, electrospark deposition technology, and magnetron sputtering. The microstructures and protective properties of HEA coatings prepared by different methods are bound to be different. Moreover, because HEAs have a wide range of composition systems, the difference in composition will inevitably lead to a change in process parameters and post-treatment methods, and then affect the microstructures and protective properties. This paper introduces the working mechanism of thermal spraying, electrospark deposition technology, and magnetron sputtering, compares the advantages and disadvantages of each method, and focuses on the influences of the compositions, process parameters, and post-treatment process on the microstructures and properties of the coating. Furthermore, this paper outlines the correlation between preparation methods, process parameters, microstructures, and properties, which will provide a reference for further development of the application of high-entropy alloy coatings. On this basis, the future development direction of HEA coatings is prospected.

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Magnetron Sputtering High-Entropy Alloy Coatings: A Mini-Review

Cited by 34 publications

References 64 publications

Atomic Radius Mismatch: A Key Parameter for Design and Synthesis of High‐Entropy Physical Vapor Deposition Coatings—Review

Atomic Radius Mismatch: A Key Parameter for Design and Synthesis of High‐Entropy Physical Vapor Deposition Coatings—Review

Microstructures, Corrosion Resistance and Wear Resistance of High-Entropy Alloys Coatings with Various Compositions Prepared by Laser Cladding: A Review

Progress on New Preparation Methods, Microstructures, and Protective Properties of High-Entropy Alloy Coatings

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