Microstructure and corrosion behaviour of AlCoFeNiTiZr high-entropy alloy films

2019 ◽  
Vol 36 (1) ◽  
pp. 78-85 ◽  
Author(s):  
Hai-dou Wang ◽  
Jin-na Liu ◽  
Zhi-guo Xing ◽  
Guo-Zheng Ma ◽  
Xiu-fang Cui ◽  
...  
Keyword(s):  
Corrosion Behaviour ◽  
High Entropy Alloy ◽  
Alloy Films ◽  
High Entropy

Fatigue resistance of nanotwinned high-entropy alloy films

2019 ◽  
Vol 739 ◽  
pp. 26-30 ◽  
Author(s):  
Wenyi Huo ◽  
Feng Fang ◽  
Xiaodong Liu ◽  
Shuyong Tan ◽  
Zonghan Xie ◽  
...  
Keyword(s):  
Fatigue Resistance ◽  
High Entropy Alloy ◽  
Alloy Films ◽  
High Entropy

scholarly journals Diffusion Barrier Performance of AlCrTaTiZr/AlCrTaTiZr-N High-Entropy Alloy Films for Cu/Si Connect System

Entropy ◽  
2020 ◽  
Vol 22 (2) ◽  
pp. 234
Author(s):  
Chunxia Jiang ◽  
Rongbin Li ◽  
Xin Wang ◽  
Hailong Shang ◽  
Yong Zhang ◽  
...  
Keyword(s):  
Intermetallic Compounds ◽  
Diffusion Barrier ◽  
Lattice Mismatch ◽  
Copper Film ◽  
Amorphous Structure ◽  
High Entropy Alloy ◽  
Alloy Films ◽  
High Entropy ◽  
Atom Diffusion ◽  
Barrier Performance

In this study, high-entropy alloy films, namely, AlCrTaTiZr/AlCrTaTiZr-N, were deposited on the n-type (100) silicon substrate. Then, a copper film was deposited on the high-entropy alloy films. The diffusion barrier performance of AlCrTaTiZr/AlCrTaTiZr-N for Cu/Si connect system was investigated after thermal annealing for an hour at 600 °C, 700 °C, 800 °C, and 900 °C. There were no Cu-Si intermetallic compounds generated in the Cu/AlCrTaTiZr/AlCrTaTiZr-N/Si film stacks after annealing even at 900 °C through transmission electron microscopy (TEM) and atomic probe tomography (APT) analysis. The results indicated that AlCrTaTiZr/AlCrTaTiZr-N alloy films can prevent copper diffusion at 900 °C. The reason was investigated in this work. The amorphous structure of the AlCrTaTiZr layer has lower driving force to form intermetallic compounds; the lattice mismatch between the AlCrTaTiZr and AlCrTaTiZ-rN layers increased the diffusion distance of the Cu atoms and the difficulty of the Cu atom diffusion to the Si substrate.

Fracture of void-embedded high-entropy-alloy films: A comprehensive atomistic study

Materialia ◽  
2020 ◽  
Vol 12 ◽  
pp. 100790 ◽  
Author(s):  
Yi Cui ◽  
Zengtao Chen ◽  
Yang Ju
Keyword(s):  
High Entropy Alloy ◽  
Alloy Films ◽  
High Entropy ◽  
Atomistic Study

scholarly journals The corrosion behaviour of CoCrFeNi-x (x = Cu, Al, Sn) high entropy alloy systems in chloride solution

2020 ◽  
Vol 172 ◽  
pp. 108740 ◽  
Author(s):  
Piyanut Muangtong ◽  
Aphichart Rodchanarowan ◽  
Duangrudee Chaysuwan ◽  
Narong Chanlek ◽  
Russell Goodall
Keyword(s):  
Chloride Solution ◽  
Corrosion Behaviour ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Alloy Systems

Influence of remelting on microstructure, hardness and corrosion behaviour of AlCoCrFeNiTi high entropy alloy

2015 ◽  
Vol 31 (10) ◽  
pp. 1194-1200 ◽  
Author(s):  
V. Soare ◽  
D. Mitrica ◽  
I. Constantin ◽  
V. Badilita ◽  
F. Stoiciu ◽  
...  
Keyword(s):  
Corrosion Behaviour ◽  
High Entropy Alloy ◽  
High Entropy

scholarly journals Effects of Nb Addition on Microstructures and Mechanical Properties of Nbx-CoCrFeMnNi High Entropy Alloy Films

Coatings ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1539
Author(s):  
Yu-Hsuan Liang ◽  
Chia-Lin Li ◽  
Chun-Hway Hsueh
Keyword(s):  
Mechanical Properties ◽  
Amorphous Phase ◽  
Compressive Yield Strength ◽  
High Entropy Alloy ◽  
Face Centered Cubic ◽  
Compression Tests ◽  
Alloy Films ◽  
High Entropy ◽  
Microstructures And Mechanical Properties ◽  
Nb Addition

In the present work, Nbx-CoCrFeMnNi high entropy alloy films (HEAFs, 0 to 7.2 at.% Nb) were fabricated by radio frequency (RF) magnetron co-sputtering of CoCrFeMnNi alloy and Nb targets. The effects of Nb addition on the microstructures and mechanical properties of HEAFs were systematically investigated. For Nb-free film (0 at.% Nb), the face-centered cubic (FCC) peaks were identified in the X-ray diffraction (XRD) pattern. The addition of Nb resulted in a broadening of diffraction peaks, a decrease in peak intensity, and the vanishment of high-angle peaks. Transmission electron microscope (TEM) images indicated the formation of nanotwins at low Nb concentrations, and a transition from a single phase FCC solid solution to an amorphous phase was observed with the increasing Nb concentration. The films were strengthened with an increase in Nb concentration. Specifically, the hardness characterized by nanoindentation increased from 6.5 to 8.1 GPa. The compressive yield strength and fracture strength measured from micropillar compression tests were improved from 1.08 GPs and 2.56 GPa to 2.70 GPa and 5.76 GPa, respectively, whereas the fracture strain decreased from >29.4% (no fracture) to 15.8%. Additionally, shear banding was observed in the presence of amorphous phase.

Corrosion behaviour of thermally sprayed Mo added AlCoCrNi high entropy alloy coating

2020 ◽  
Vol 27 ◽  
pp. 2398-2400 ◽  
Author(s):  
A. Vallimanalan ◽  
S.P. Kumaresh Babu ◽  
S. Muthukumaran ◽  
M. Murali ◽  
Vivek Gaurav ◽  
...  
Keyword(s):  
Corrosion Behaviour ◽  
Alloy Coating ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Thermally Sprayed

scholarly journals Multiscale mechanical performance and corrosion behaviour of plasma sprayed AlCoCrFeNi high-entropy alloy coatings

2021 ◽  
Vol 854 ◽  
pp. 157140
Author(s):  
Ashok Meghwal ◽  
Ameey Anupam ◽  
Vladimir Luzin ◽  
Christiane Schulz ◽  
Colin Hall ◽  
...  
Keyword(s):  
Mechanical Performance ◽  
Corrosion Behaviour ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Plasma Sprayed

Effect of the Annealing Treatment on the Microstructure, Microhardness and Corrosion Behaviour of Al0.3CrFe1.5MnNi0.5 High-Entropy Alloys

2013 ◽  
Vol 748 ◽  
pp. 79-85 ◽  
Author(s):  
L.C. Tsao ◽  
C.S. Chen ◽  
Kuo Huan Fan ◽  
Yen Teng Huang
Keyword(s):  
Corrosion Behaviour ◽  
Dendritic Structure ◽  
Annealing Treatment ◽  
Age Hardening ◽  
High Entropy Alloy ◽  
Second Phase ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Fcc Phase ◽  
Bcc Phase

In this study, an Al0.3CrFe1.5MnNi0.5high entropy alloy was synthesized by arc-melting in Ar. The as-cast alloy ingot was heat treated for 8 h at 650-750°C and then cooled in furnace to investigate the effects of age treatment on the microstructure, hardness and corrosion behaviour. The microstructure of as-cast sample has a typical rich-Cr BCC structure of dendrites, rich-Ni FCC interdendrite phases and a small fraction of cross-like rich-Ni FCC phase within the majority dendritic structure. During annealing treatment at 650°C, the cross-like FCC phase (β-FCC) gradually decreased, dendritic rich-Cr BCC phase transfers to Cr5Fe6Mn8phase, and the AlNi phase precipitated within the matrix dendrites. The interdendritic β1-FCC phases gradually decomposed and transfers to second-phase (β2FCC), and the AlNi precipitated phase coarsen during annealing at 750°C. In addition, Cr5Fe6Mn8phase gradually transfers to rich-Cr BCC phase during slow-cooling process. These precipitation phases in the grain matrix are the main age hardening mechanism. The potentiodynamic polarization of the Al0.3CrFe1.5MnNi0.5high entropy alloys, obtained in 3.5% NaCl solutions, clearly revealed that the corrosion resistance increases and the passive region decreases as annealing temperature increasing.

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