Diffusion barrier properties of AlMoNbSiTaTiVZr high-entropy alloy layer between copper and silicon

2008 ◽  
Vol 516 (16) ◽  
pp. 5527-5530 ◽  
Author(s):  
Ming-Hung Tsai ◽  
Jien-Wei Yeh ◽  
Jon-Yiew Gan
Keyword(s):  
Diffusion Barrier ◽  
Barrier Properties ◽  
Alloy Layer ◽  
High Entropy Alloy ◽  
High Entropy

AlCoCrNiMo high-entropy alloy as diffusion barrier between NiAlHf coating and Ni-based single crystal superalloy

2021 ◽  
Vol 414 ◽  
pp. 127101 ◽  
Author(s):  
Zhongzhan Xu ◽  
Peng Zhang ◽  
Wei Wang ◽  
Qian Shi ◽  
Hongzhi Yang ◽  
...  
Keyword(s):  
Single Crystal ◽  
Diffusion Barrier ◽  
Single Crystal Superalloy ◽  
High Entropy Alloy ◽  
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.

Microstructure and wear resistance of TiC reinforced AlCoCrFeNi2.1 eutectic high entropy alloy layer fabricated by micro-plasma cladding

2021 ◽  
Vol 284 ◽  
pp. 128859
Author(s):  
Fuxing Ye ◽  
Yu Yang ◽  
Zhi Lou ◽  
Lingzhi Feng ◽  
Lei Guo ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Alloy Layer ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Plasma Cladding

Microstructure and Properties of MoFeCrTiW High-Entropy Alloy Coating Prepared by Laser Cladding

2013 ◽  
Vol 820 ◽  
pp. 63-66 ◽  
Author(s):  
Bo Zheng ◽  
Qi Bin Liu ◽  
Ling Yan Zhang
Keyword(s):  
Laser Cladding ◽  
Alloy Coating ◽  
Lattice Parameter ◽  
Alloy Layer ◽  
Middle Part ◽  
High Entropy Alloy ◽  
High Entropy Alloys ◽  
Q235 Steel ◽  
High Entropy ◽  
Microstructure And Properties

To obtain high-entropy alloys (HEAS) coating with excellent properties on Q235 steel, a kind of HEAS powders was designed. The HEAS coating was prepared uniformly on Q235 steel by laser cladding. By means of OM, XRD and microhardness tester, the microstructure and properties of the high-entropy alloy layer were investigated. The experimental results indicate that the phases in the high-entropy alloy coating is mainly MoFeCrTiW with simple BCC, whose lattice parameter is a-3.1256Å. The microstructure in the coating is mainly cellular crystal, on which dispersion precipitates exist. And in the near bottom of the coating, there is few precipitates, in the middle part of coating, the precipitates are larger than that of bottom coating, while in near top of coating, dispersion precipitates become largest. The maximum microhardness value of coating reaches 800HV0.98.

Instant and Persistent Hydrogen Production Using Nano High Entropy Catalyst

2019 ◽  
Author(s):  
Nirmal Kumar ◽  
Subramanian Nellaiappan ◽  
Ritesh Kumar ◽  
Kirtiman Deo Malviya ◽  
K. G. Pradeep ◽  
...  
Keyword(s):  
Formic Acid ◽  
Minimum Energy ◽  
High Entropy Alloy ◽  
Hydrogen Energy ◽  
High Entropy ◽  
Electro Oxidation ◽  
The Individual ◽  
Novel Catalyst ◽  
Cell Anode ◽  
Fuel Cell Anode

<div>Renewable harvesting clean and hydrogen energy using the benefits of novel multicatalytic materials of high entropy alloy (HEA equimolar Cu-Ag-Au-Pt-Pd) from formic acid with minimum energy input has been achieved in the present investigation. The synthesis effect of pristine elements in the HEA drives the electro-oxidation reaction towards non-carbonaceous pathway . The atomistic simulation based on DFT rationalize the distinct lowering of the d-band center for the individual atoms in the HEA as compared to the pristine counterparts. This catalytic activity of the HEA has also been extended to methanol electro-oxidation to show the unique capability of the novel catalyst. The nanostructured HEA, properties using a combination of casting and cry omilling techniques can further be utilized as fuel cell anode in direct formic acid/methanol fuel cells (DFFE).<br></div>

Complex magnetism and magnetoresistance of Gd-Tb-Dy-Ho-Lu hexagonal high-entropy alloy

2018 ◽  
Author(s):  
Janez Dolinšek ◽  
Stanislav Vrtnik ◽  
J. Lužnik ◽  
P. Koželj ◽  
M. Feuerbacher
Keyword(s):  
High Entropy Alloy ◽  
High Entropy
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