scholarly journals First hexagonal close packed high-entropy alloy with outstanding stability under extreme conditions and electrocatalytic activity for methanol oxidation

2017 ◽  
Vol 138 ◽  
pp. 22-27 ◽  
Author(s):  
Kirill V. Yusenko ◽  
Sephira Riva ◽  
Patricia A. Carvalho ◽  
Maria V. Yusenko ◽  
Serena Arnaboldi ◽  
...  
Keyword(s):  
Methanol Oxidation ◽  
Electrocatalytic Activity ◽  
High Entropy Alloy ◽  
Extreme Conditions ◽  
High Entropy ◽  
Hexagonal Close Packed

scholarly journals Microstructure Refinement by Low-Temperature Ausforming in an Fe-Based Metastable High-Entropy Alloy

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 742
Author(s):  
Motomichi Koyama ◽  
Takeaki Gondo ◽  
Kaneaki Tsuzaki
Keyword(s):  
Low Temperature ◽  
Plastic Anisotropy ◽  
High Entropy Alloy ◽  
Face Centered Cubic ◽  
High Entropy ◽  
Microstructure Refinement ◽  
Hexagonal Close Packed ◽  
Solution Treated Condition ◽  
Solution Treated ◽  
Face Centered

The effects of ausforming in an Fe30Mn10Cr10Co high-entropy alloy on the microstructure, hardness, and plastic anisotropy were investigated. The alloy showed a dual-phase microstructure consisting of face-centered cubic (FCC) austenite and hexagonal close-packed (HCP) martensite in the as-solution-treated condition, and the finish temperature for the reverse transformation was below 200 °C. Therefore, low-temperature ausforming at 200 °C was achieved, which resulted in microstructure refinement and significantly increased the hardness. Furthermore, plasticity anisotropy, a common problem in HCP structures, was suppressed by the ausforming treatment. This, in turn, reduced the scatter of the hardness.

scholarly journals A hexagonal close-packed high-entropy alloy: The effect of entropy

2016 ◽  
Vol 96 ◽  
pp. 10-15 ◽  
Author(s):  
Y.J. Zhao ◽  
J.W. Qiao ◽  
S.G. Ma ◽  
M.C. Gao ◽  
H.J. Yang ◽  
...  
Keyword(s):  
High Entropy Alloy ◽  
High Entropy ◽  
Hexagonal Close Packed

Hexagonal close-packed high-entropy alloy formation under extreme processing conditions

2019 ◽  
Vol 34 (5) ◽  
pp. 709-719 ◽  
Author(s):  
Ram Devanathan ◽  
Weilin Jiang ◽  
Karen Kruska ◽  
Michele A. Conroy ◽  
Timothy C. Droubay ◽  
...  
Keyword(s):  
High Entropy Alloy ◽  
Alloy Formation ◽  
Processing Conditions ◽  
High Entropy ◽  
Hexagonal Close Packed ◽  
Image Position

Abstract

scholarly journals High pressure synthesis of a hexagonal close-packed phase of the high-entropy alloy CrMnFeCoNi

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Cameron L. Tracy ◽  
Sulgiye Park ◽  
Dylan R. Rittman ◽  
Steven J. Zinkle ◽  
Hongbin Bei ◽  
...  
Keyword(s):  
High Pressure ◽  
High Entropy Alloy ◽  
High Entropy ◽  
High Pressure Synthesis ◽  
Hexagonal Close Packed ◽  
Pressure Synthesis

scholarly journals Ir–Re binary alloys under extreme conditions and their electrocatalytic activity in methanol oxidation

2017 ◽  
Vol 139 ◽  
pp. 236-243 ◽  
Author(s):  
Kirill V. Yusenko ◽  
Elena Bykova ◽  
Maxim Bykov ◽  
Sephira Riva ◽  
Wilson A. Crichton ◽  
...  
Keyword(s):  
Methanol Oxidation ◽  
Electrocatalytic Activity ◽  
Binary Alloys ◽  
Extreme Conditions

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>

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