Processing and characterization of a multibeam sputtered nanocrystalline CoCrFeNi high-entropy alloy film

Nagy, Péter; Rohbeck, Nadia; Roussely, G.; Sortais, P.; Lábár, János L.; Gubicza, Jenő; Michler, Johann; Pethő, László

doi:10.1016/j.surfcoat.2020.125465

Cited by 46 publications

(40 citation statements)

References 23 publications

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“…The concentration maps are shown in Figure 3 , in which the atomic percentages between the studied points were estimated by interpolation using the contour plot with layer boundaries function in the software Origin. It should be noted that the mapping of the concentrations of the constituents was performed for another Co-Cr-Ni-Fe film in our previous paper [ 11 ]. That sample was processed under the same PVD conditions, and the chemical composition map was obtained on the whole disk by X-ray fluorescence (XRF) spectroscopy.…”

Section: Resultsmentioning

confidence: 99%

“…These attributes of the instrument led to a gradient of chemical composition in the sample. A more detailed description of this PVD method has been published elsewhere [ 11 ]. The substrate was a Si single crystal with a diameter of 10 cm.…”

Section: Methodsmentioning

confidence: 99%

“…In recent years, studies about HEA thin films started to appear more frequently in the literature. The manufacturing of HEA thin films utilizes many methods and techniques, such as direct-current magnetron sputtering [ 7 , 8 ], thermal evaporation [ 9 ], radio-frequency sputtering [ 10 ], or multibeam sputtering [ 11 ]. HEA thin films attract attention due to their immense potential in applications on account of their outstanding mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

“…HEA thin films attract attention due to their immense potential in applications on account of their outstanding mechanical properties. In recent works, HEA thin films were compared with bulk materials with the same composition, the hardness and Young’s modulus measured for thin films often surpassed the values obtained on the bulk materials [ 11 , 12 ]. Many studies focused on the investigation of the microstructure of HEA thin films [ 8 , 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, combinatorial samples provide an excellent opportunity to study many chemical compositions on one sample. In recent years, studies reported successful synthesis of combinatorial thin-film samples of CCAs [ 11 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

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Microstructure, Hardness, and Elastic Modulus of a Multibeam-Sputtered Nanocrystalline Co-Cr-Fe-Ni Compositional Complex Alloy Film

et al. 2021

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A nanocrystalline Co-Cr-Ni-Fe compositional complex alloy (CCA) film with a thickness of about 1 micron was produced by a multiple-beam-sputtering physical vapor deposition (PVD) technique. The main advantage of this novel method is that it does not require alloy targets, but rather uses commercially pure metal sources. Another benefit of the application of this technique is that it produces compositional gradient samples on a disk surface with a wide range of elemental concentrations, enabling combinatorial analysis of CCA films. In this study, the variation of the phase composition, the microstructure (crystallite size and defect density), and the mechanical performance (hardness and elastic modulus) as a function of the chemical composition was studied in a combinatorial Co-Cr-Ni-Fe thin film sample that was produced on a surface of a disk with a diameter of about 10 cm. The spatial variation of the crystallite size and the density of lattice defects (e.g., dislocations and twin faults) were investigated by X-ray diffraction line profile analysis performed on the patterns taken by synchrotron radiation. The hardness and the elastic modulus were measured by the nanoindentation technique. It was found that a single-phase face-centered cubic (fcc) structure was formed for a wide range of chemical compositions. The microstructure was nanocrystalline with a crystallite size of 10–27 nm and contained a high lattice defect density. The hardness and the elastic modulus values measured for very different compositions were in the ranges of 8.4–11.8 and 182–239 GPa, respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microstructure, Hardness, and Elastic Modulus of a Multibeam-Sputtered Nanocrystalline Co-Cr-Fe-Ni Compositional Complex Alloy Film

et al. 2021

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Combinatorial Design of Novel Multiprincipal Element Alloys Using Experimental Techniques

Gubicza

2023

Adv Eng Mater

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Multiprincipal element alloys (MPEAs) including high‐entropy alloys are in the focus of materials science since many MPEA compositions exhibit outstanding mechanical and physical properties. These alloys contain 3–6 constituents with similar fractions; therefore, MPEAs correspond to the unexplored middle part of the phase diagrams. The phase composition and the performance of MPEAs are strongly influenced by their chemistry. Thus, it is very important to reveal the correlation between the composition, the structure, and the properties of MPEAs. On the other hand, this task is challenging due to the vast composition space of these alloys. The processing and characterization of combinatorial specimens can yield a fast mapping of compositional libraries of MPEAs. Herein, the experimental techniques developed for manufacturing and investigation of these alloys are overviewed and the results are critically discussed. Finally, further development directions in the field of combinatorial MPEAs are recommended in order to improve the study of the different alloy compositions.

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Elemental Influence on Oxidation Behaviour of Cantor‐Based and Refractory High Entropy Alloys: A Critical Review

Dehury,

Kumar,

Joshi

et al. 2024

Adv Eng Mater

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This article reviews the oxidation behaviour of the two most significant high entropy alloy systems (HEAs) namely Cantor‐based and refractory HEAs. HEAs have been extensively researched and show potential applications in various industries, including marine engine manufacturing, chemical industry, furnaces, ducting, heat exchangers, jet engines, steam turbines, nuclear reactors and electronic devices, among others. Effect of the presence of elements such as aluminium, manganese, chromium, silicon, tantalum, vanadium etc. are studied for catalysing the oxidation of HEAs. Aluminium, chromium and silicon are reportedly found to considerably impact the oxidation kinetics and enhance the oxidation resistance. However, silicon can positively or adversely affect the oxidation resistance depending on its concentration and alloy composition. Other elements like manganese tend to adversely impact the oxidation resistance of FeCoNi‐based HEAs. Refractory elements are typically found to be not suitable for oxidation studies due to the formation of non‐protective oxide layers. However, refractory HEAs offer interesting trends both in terms of enhancing or reducing oxidation resistance depending on the alloying elements. Similarly, findings related to other elements are also presented and elaborated.This article is protected by copyright. All rights reserved.

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Processing and characterization of a multibeam sputtered nanocrystalline CoCrFeNi high-entropy alloy film

Cited by 46 publications

References 23 publications

Microstructure, Hardness, and Elastic Modulus of a Multibeam-Sputtered Nanocrystalline Co-Cr-Fe-Ni Compositional Complex Alloy Film

Microstructure, Hardness, and Elastic Modulus of a Multibeam-Sputtered Nanocrystalline Co-Cr-Fe-Ni Compositional Complex Alloy Film

Combinatorial Design of Novel Multiprincipal Element Alloys Using Experimental Techniques

Elemental Influence on Oxidation Behaviour of Cantor‐Based and Refractory High Entropy Alloys: A Critical Review

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