scholarly journals Review and outlook on high-entropy alloys for hydrogen storage

2021 ◽  
Author(s):  
Michael Felderhoff ◽  
Felipe Marques ◽  
Mateusz Balcerzak ◽  
Frederik Winkelmann ◽  
Guilherme Zepon
Keyword(s):  
Hydrogen Storage ◽  
Metal Hydrides ◽  
High Entropy Alloys ◽  
High Entropy ◽  
New Class

Recently, a new class of alloys, namely, high-entropy alloys (HEAs), started to be investigated for hydrogen storage as they can form metal hydrides. Considering that the properties of metal hydrides...

Enhanced Hydrogen Storage Properties of ZrTiVAl 1-xFe x High-Entropy Alloys Via Modified Fe Content

2021 ◽  
Author(s):  
Xiangfeng Ma ◽  
Xin Ding ◽  
Ruirun Chen ◽  
Xuefeng Gao ◽  
Yanqing Su ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
High Entropy Alloys ◽  
Hydrogen Storage Properties ◽  
High Entropy ◽  
Fe Content ◽  
Storage Properties

scholarly journals HIGH-ENTROPY ALLOYS AS A PROSPECTIVE CLASS OF NEW RADIATION-TOLERANT MATERIALS RESEARCH DEVELOPMENT ANALYSIS BASED ON THE INFORMATION DATABASES

2021 ◽  
pp. 3-15
Author(s):  
A.V. Levenets ◽  
M.A. Tikhonovsky ◽  
V.N. Voyevodin ◽  
A.G. Shepelev ◽  
O.V. Nemashkalo
Keyword(s):  
Radiation Damage ◽  
Exponential Growth ◽  
High Entropy Alloys ◽  
Research Development ◽  
Metallic Materials ◽  
High Entropy ◽  
New Class ◽  
Materials Research ◽  
Development Analysis ◽  
Radiation Tolerant

A new class of metallic materials, so-called “high-entropy alloys” (HEAs), was under review. Various definitions of these alloys are given, their main differences from the conventional alloys are indicated and the dynamics of publications in the period from the first publications in 2004 to the end of 2020 are presented. It is noted the almost exponential growth of the article numbers concerning these alloys, and the main reasons of such high interest are discussed. Experimental results of development the radiation-tolerant materials based on the concept of high-entropy alloys and study of the radiation damage mechanisms are summarised.

Hydrogen storage in TiZrNbFeNi high entropy alloys, designed by thermodynamic calculations

2020 ◽  
Vol 45 (58) ◽  
pp. 33759-33770 ◽  
Author(s):  
Ricardo Floriano ◽  
Guilherme Zepon ◽  
Kaveh Edalati ◽  
Gabriel L.B.G. Fontana ◽  
Abbas Mohammadi ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Thermodynamic Calculations ◽  
High Entropy Alloys ◽  
High Entropy

scholarly journals High-Pressure Induced Phase Transitions in High-Entropy Alloys: A Review

Entropy ◽  
2019 ◽  
Vol 21 (3) ◽  
pp. 239 ◽  
Author(s):  
Fei Zhang ◽  
Hongbo Lou ◽  
Benyuan Cheng ◽  
Zhidan Zeng ◽  
Qiaoshi Zeng
Keyword(s):  
High Pressure ◽  
Phase Transitions ◽  
Future Research ◽  
High Entropy Alloys ◽  
High Entropy ◽  
New Class ◽  
Materials Research ◽  
The Stability ◽  
Irreversible Phase Transitions

High-entropy alloys (HEAs) as a new class of alloy have been at the cutting edge of advanced metallic materials research in the last decade. With unique chemical and topological structures at the atomic level, HEAs own a combination of extraordinary properties and show potential in widespread applications. However, their phase stability/transition, which is of great scientific and technical importance for materials, has been mainly explored by varying temperature. Recently, pressure as another fundamental and powerful parameter has been introduced to the experimental study of HEAs. Many interesting reversible/irreversible phase transitions that were not expected or otherwise invisible before have been observed by applying high pressure. These recent findings bring new insight into the stability of HEAs, deepens our understanding of HEAs, and open up new avenues towards developing new HEAs. In this paper, we review recent results in various HEAs obtained using in situ static high-pressure synchrotron radiation x-ray techniques and provide some perspectives for future research.

High-entropy alloys in light transition metal systems

2014 ◽  
Vol 70 (a1) ◽  
pp. C943-C943
Author(s):  
Roksolana Kozak ◽  
Walter Steurer
Keyword(s):  
Single Phase ◽  
Elevated Temperatures ◽  
High Hardness ◽  
High Entropy Alloys ◽  
X Ray Diffraction ◽  
High Entropy ◽  
Mixing Entropy ◽  
Al Content ◽  
New Class ◽  
Arc Melting

High-entropy alloys (HEAs) are a new class of alloys designed with the approach of maximization of configurational mixing entropy by increasing the number of constituents [1,2]. Alloys produced in such a way are reported for a variety of promising properties (high hardness and strength, wear resistance, magnetism etc.) [3]. However, origin of these properties (microstructure, phase content, element composition, thermal history) is not always clear. High mixing entropy in HEAs favours the formation of single-phase substitutional solid solutions at elevated temperatures with approximately equiatomic compositions and simple average crystal structures of either the cF4-Cu (fcc) or the cI2-W (bcc). Nevertheless, only a few element combinations produce truly single-phase materials. In order to search for new HEAs compositions samples in the systems Cr-Fe-Co-Ni-Al and Cr-Fe-Co-Ni-Mn were synthesized by arc melting and homogenized in tantalum ampoules at 1100 and 1300 °C for 2 weeks. DTA, X-ray diffraction and electron microscopy measurements were performed. Only samples with small Al content (~ 5 at.%) showed the single-phase microstructure. Their local atomic structure is under investigation.

scholarly journals High-Entropy Alloys for Solid Hydrogen Storage: Potentials and Prospects

2022 ◽  
Author(s):  
Thakur Prasad Yadav ◽  
Abhishek Kumar ◽  
Satish Kumar Verma ◽  
Nilay Krishna Mukhopadhyay
Keyword(s):  
Hydrogen Storage ◽  
Solid Hydrogen ◽  
High Entropy Alloys ◽  
High Entropy

scholarly journals Hydrogen storage in high-entropy alloys with varying degree of local lattice strain

2019 ◽  
Vol 44 (55) ◽  
pp. 29140-29149 ◽  
Author(s):  
Magnus Moe Nygård ◽  
Gustav Ek ◽  
Dennis Karlsson ◽  
Martin Sahlberg ◽  
Magnus H. Sørby ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Lattice Strain ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Local Lattice

Synthesis and hydrogen storage behavior of Mg–V–Al–Cr–Ni high entropy alloys

2021 ◽  
Vol 46 (2) ◽  
pp. 2351-2361 ◽  
Author(s):  
R.B. Strozi ◽  
D.R. Leiva ◽  
J. Huot ◽  
W.J. Botta ◽  
G. Zepon
Keyword(s):  
Hydrogen Storage ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Storage Behavior
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