scholarly journals Synthesis of high-entropy-alloy-type superconductors (Fe,Co,Ni,Rh,Ir)Zr2 with tunable transition temperature

2021 ◽  
Vol 56 (15) ◽  
pp. 9499-9505
Author(s):  
Md. Riad Kasem ◽  
Aichi Yamashita ◽  
Yosuke Goto ◽  
Tatsuma D. Matsuda ◽  
Yoshikazu Mizuguchi
Keyword(s):  
Transition Temperature ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Alloy Type

scholarly journals Synthesis of new high-entropy alloy-type Nb3 (Al, Sn, Ge, Ga, Si) superconductors

2021 ◽  
Vol 868 ◽  
pp. 159233
Author(s):  
Aichi Yamashita ◽  
Tatsuma D. Matsuda ◽  
Yoshikazu Mizuguchi
Keyword(s):  
High Entropy Alloy ◽  
High Entropy ◽  
Alloy Type

scholarly journals Synthesis of RE123 high-Tc superconductors with a high-entropy-alloy-type RE site

2020 ◽  
Vol 572 ◽  
pp. 1353623 ◽  
Author(s):  
Yuta Shukunami ◽  
Aichi Yamashita ◽  
Yosuke Goto ◽  
Yoshikazu Mizuguchi
Keyword(s):  
High Entropy Alloy ◽  
High Tc Superconductors ◽  
High Tc ◽  
High Entropy ◽  
Alloy Type

scholarly journals Effect of electron count and chemical complexity in the Ta-Nb-Hf-Zr-Ti high-entropy alloy superconductor

2016 ◽  
Vol 113 (46) ◽  
pp. E7144-E7150 ◽  
Author(s):  
Fabian von Rohr ◽  
Michał J. Winiarski ◽  
Jing Tao ◽  
Tomasz Klimczuk ◽  
Robert Joseph Cava
Keyword(s):  
Transition Temperature ◽  
Amorphous Materials ◽  
Valence Electron ◽  
High Entropy Alloy ◽  
High Entropy Alloys ◽  
Superconducting Transition ◽  
Body Centered Cubic ◽  
High Entropy ◽  
Chemical Complexity ◽  
Principal Elements

High-entropy alloys are made from random mixtures of principal elements on simple lattices, stabilized by a high mixing entropy. The recently discovered body-centered cubic (BCC) Ta-Nb-Hf-Zr-Ti high-entropy alloy superconductor appears to display properties of both simple crystalline intermetallics and amorphous materials; e.g., it has a well-defined superconducting transition along with an exceptional robustness against disorder. Here we show that the valence electron count dependence of the superconducting transition temperature in the high-entropy alloy falls between those of analogous simple solid solutions and amorphous materials and test the effect of alloy complexity on the superconductivity. We propose high-entropy alloys as excellent intermediate systems for studying superconductivity as it evolves between crystalline and amorphous materials.

Evaluation of Microstructure and Glass Transition Temperature of Al-Cu-Cr-Fe-Ni High-Entropy Alloy by Molecular Dynamics Simulation

2012 ◽  
Vol 579 ◽  
pp. 398-406 ◽  
Author(s):  
Jen Ching Huang ◽  
Shao Hsun Chang ◽  
Hsin Pei Chen
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Aluminum Content ◽  
Amorphous State ◽  
Dynamics Simulation ◽  
High Entropy Alloy ◽  
High Entropy Alloys ◽  
Quenching Rate ◽  
High Entropy

In this study, the microstructure and glass transition temperature (Tg) of five elements (Al-Cu-Cr-Fe-Ni) high-entropy alloy was evaluated under different Al content by molecular dyItalic textnamics (MD) simulations. The ensemble and COMPASS potential were used. Firstly, the Al-Cu-Cr-Fe-Ni high-entropy alloys were melted at high temperature and were cooled with a high quenching rate further. The radial distribution function (RDF),Wendt-Abraham parameter and X-ray diffractometer (XRD) were used to analyze the change on the microstructure and glass transition temperature (Tg) of Al-Cu-Cr-Fe-Ni high-entropy alloys. Simulation results show that the micro-structure of different aluminum content of AlxCuCrFeNi alloy after fast quenching are all amorphous state. When the aluminum content decreased, the amorphous state are more obvious and the glass transition temperature decreases.

scholarly journals Anomalous broadening of specific heat jump at Tc in high-entropy-alloy-type superconductor TrZr2

2021 ◽  
Author(s):  
Md. Riad Kasem ◽  
Aichi Yamashita ◽  
Taishi Hatano ◽  
Kota Sakurai ◽  
Naoko Oono-Hori ◽  
...  
Keyword(s):  
Specific Heat ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Alloy Type ◽  
Specific Heat Jump

scholarly journals Superconductivity in REO0.5F0.5BiS2 with high-entropy-alloy-type blocking layers

2018 ◽  
Vol 11 (5) ◽  
pp. 053102 ◽  
Author(s):  
Ryota Sogabe ◽  
Yosuke Goto ◽  
Yoshikazu Mizuguchi
Keyword(s):  
High Entropy Alloy ◽  
High Entropy ◽  
Alloy Type

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

Recent progress in multi-element alloy and nitride coatings sputtered from high-entropy alloy targets

2006 ◽  
Vol 31 (6) ◽  
pp. 723-736 ◽  
Author(s):  
Keng-Hao Cheng ◽  
Chia-Han Lai ◽  
Su-Jien Lin ◽  
Jien-Wei Yeh
Keyword(s):  
Recent Progress ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Nitride Coatings
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