Electrodeposition, Characterization, and Corrosion Behavior of CoCrFeMnNi High-Entropy Alloy Thin Films

Potentiostatic electrodeposition was used to obtain CoCrFeMnNi high-entropy alloy (HEA) thin films on copper substrate. An electrolyte based on a DMSO (dimethyl sulfoxide)-CH3CN (acetonitrile) organic compound was used for the HEA deposition. The microstructure of the high-entropy deposits before and after corrosion in artificial seawater was investigated by scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS) investigation. SEM analysis revealed that compact and uniform film consists of compact and uniform 50 nm–5 μm particles that form the HEA films. The successful co-deposition of all five elements was highlighted by the energy dispersive spectrometry investigation (EDS). Electrochemical measurements carried out in an aerated artificial seawater solution under ambient conditions demonstrated the promising potential for application in the field of anti-corrosion protection, due to the protective behavior of the HEA thin films.

Download Full-text

An advancement in the synthesis of unique soft magnetic CoCuFeNiZn high entropy alloy thin films

Scientific Reports ◽

10.1038/s41598-021-87786-8 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Chokkakula L. P. Pavithra ◽

Reddy Kunda Siri Kiran Janardhana ◽

Kolan Madhav Reddy ◽

Chandrasekhar Murapaka ◽

Joydip Joardar ◽

...

Keyword(s):

Thin Films ◽

Saturation Magnetization ◽

Functional Materials ◽

Single Step ◽

High Entropy Alloy ◽

High Saturation Magnetization ◽

Soft Magnetic ◽

High Entropy ◽

High Saturation ◽

Electrochemical Approach

AbstractDiscovery of advanced soft-magnetic high entropy alloy (HEA) thin films are highly pursued to obtain unidentified functional materials. The figure of merit in current nanocrystalline HEA thin films relies in integration of a simple single-step electrochemical approach with a complex HEA system containing multiple elements with dissimilar crystal structures and large variation of melting points. A new family of Cobalt–Copper–Iron–Nickel–Zinc (Co–Cu–Fe–Ni–Zn) HEA thin films are prepared through pulse electrodeposition in aqueous medium, hosts nanocrystalline features in the range of ~ 5–20 nm having FCC and BCC dual phases. The fabricated Co–Cu–Fe–Ni–Zn HEA thin films exhibited high saturation magnetization value of ~ 82 emu/g, relatively low coercivity value of 19.5 Oe and remanent magnetization of 1.17%. Irrespective of the alloying of diamagnetic Zn and Cu with ferromagnetic Fe, Co, Ni elements, the HEA thin film has resulted in relatively high saturation magnetization which can provide useful insights for its potential unexplored applications.

Download Full-text

Electrochemical deposition and microstructural characterization of AlCrFeMnNi and AlCrCuFeMnNi high entropy alloy thin films

Applied Surface Science ◽

10.1016/j.apsusc.2015.07.142 ◽

2015 ◽

Vol 358 ◽

pp. 533-539 ◽

Cited By ~ 29

Author(s):

V. Soare ◽

M. Burada ◽

I. Constantin ◽

D. Mitrică ◽

V. Bădiliţă ◽

...

Keyword(s):

Thin Films ◽

Electrochemical Deposition ◽

Microstructural Characterization ◽

High Entropy Alloy ◽

High Entropy

Download Full-text

Synthesis of high-entropy alloy thin films via grain boundary diffusion–assisted solid-state alloying

Scripta Materialia ◽

10.1016/j.scriptamat.2021.114302 ◽

2022 ◽

Vol 207 ◽

pp. 114302

Author(s):

Seungjin Nam ◽

Sang Jun Kim ◽

Moon J. Kim ◽

Manuel Quevedo-Lopez ◽

Jun Yeon Hwang ◽

...

Keyword(s):

Thin Films ◽

Solid State ◽

Grain Boundary ◽

Boundary Diffusion ◽

Grain Boundary Diffusion ◽

High Entropy Alloy ◽

High Entropy

Download Full-text

Effect of Zr addition on microstructure and mechanical properties of CoCrFeNiZrx high-entropy alloy thin films

Applied Nanoscience ◽

10.1007/s13204-019-01057-7 ◽

2019 ◽

Cited By ~ 2

Author(s):

Xiaobin Feng ◽

Sufeng Fan ◽

Fanling Meng ◽

James Utama Surjadi ◽

Ke Cao ◽

...

Keyword(s):

Thin Films ◽

Mechanical Properties ◽

High Entropy Alloy ◽

High Entropy ◽

Zr Addition ◽

Microstructure And Mechanical Properties

Download Full-text

Annealing-induced abnormal hardening in nanocrystalline NbMoTaW high-entropy alloy thin films

Materials Letters ◽

10.1016/j.matlet.2020.128097 ◽

2020 ◽

Vol 275 ◽

pp. 128097

Author(s):

Xiaobin Feng ◽

James Utama Surjadi ◽

Yang Lu

Keyword(s):

Thin Films ◽

High Entropy Alloy ◽

High Entropy

Download Full-text

Mechanical and electrical properties of NbMoTaW refractory high-entropy alloy thin films

International Journal of Refractory Metals and Hard Materials ◽

10.1016/j.ijrmhm.2019.02.005 ◽

2019 ◽

Vol 80 ◽

pp. 286-291 ◽

Cited By ~ 17

Author(s):

Hanuel Kim ◽

Seungjin Nam ◽

Aeran Roh ◽

Myungwoo Son ◽

Moon-Ho Ham ◽

...

Keyword(s):

Thin Films ◽

Electrical Properties ◽

High Entropy Alloy ◽

High Entropy ◽

Mechanical And Electrical Properties

Download Full-text

High Strength and Deformation Mechanisms of Al0.3CoCrFeNi High-Entropy Alloy Thin Films Fabricated by Magnetron Sputtering

Entropy ◽

10.3390/e21020146 ◽

2019 ◽

Vol 21 (2) ◽

pp. 146 ◽

Cited By ~ 7

Author(s):

Wei-Bing Liao ◽

Hongti Zhang ◽

Zhi-Yuan Liu ◽

Pei-Feng Li ◽

Jian-Jun Huang ◽

...

Keyword(s):

Thin Film ◽

Thin Films ◽

Magnetron Sputtering ◽

High Hardness ◽

Deformation Mechanisms ◽

High Entropy Alloy ◽

Alloy Thin Film ◽

Face Centered Cubic ◽

High Entropy ◽

Strength And Deformation

Recently, high-entropy alloy thin films (HEATFs) with nanocrystalline structures and high hardness were developed by magnetron sputtering technique and have exciting potential to make small structure devices and precision instruments with sizes ranging from nanometers to micrometers. However, the strength and deformation mechanisms are still unclear. In this work, nanocrystalline Al0.3CoCrFeNi HEATFs with a thickness of ~4 μm were prepared. The microstructures of the thin films were comprehensively characterized, and the mechanical properties were systematically studied. It was found that the thin film was smooth, with a roughness of less than 5 nm. The chemical composition of the high entropy alloy thin film was homogeneous with a main single face-centered cubic (FCC) structure. Furthermore, it was observed that the hardness and the yield strength of the high-entropy alloy thin film was about three times that of the bulk samples, and the plastic deformation was inhomogeneous. Our results could provide an in-depth understanding of the mechanics and deformation mechanism for future design of nanocrystalline HEATFs with desired properties.

Download Full-text