Electromagnetic wave absorption properties of FeCoNiCrAl0.8 high entropy alloy powders and its amorphous structure prepared by high-energy ball milling

2016 ◽  
Vol 31 (16) ◽  
pp. 2398-2406 ◽  
Author(s):  
Peipei Yang ◽  
Ying Liu ◽  
Xiuchen Zhao ◽  
Jingwei Cheng ◽  
Hong Li
Keyword(s):  
Electromagnetic Wave ◽  
Ball Milling ◽  
High Energy ◽  
Amorphous Structure ◽  
High Entropy Alloy ◽  
Absorption Properties ◽  
Electromagnetic Wave Absorption ◽  
High Entropy ◽  
Energy Ball ◽  
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Abstract

scholarly journals Refractory High-Entropy HfTaTiNbZr-Based Alloys by Combined Use of Ball Milling and Spark Plasma Sintering: Effect of Milling Intensity

Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1268 ◽  
Author(s):  
Natalia Shkodich ◽  
Alexey Sedegov ◽  
Kirill Kuskov ◽  
Sergey Busurin ◽  
Yury Scheck ◽  
...  
Keyword(s):  
Solid Solution ◽  
Ball Milling ◽  
Spark Plasma Sintering ◽  
Vickers Hardness ◽  
High Energy ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Energy Ball

For the first time, a powder of refractory body-centered cubic (bcc) HfTaTiNbZr-based high-entropy alloy (RHEA) was prepared by short-term (90 min) high-energy ball milling (HEBM) followed by spark plasma sintering (SPS) at 1300 °C for 10 min and the resultant bulk material was characterized by XRD and SEM/EDX. The material showed ultra-high Vickers hardness (10.7 GPa) and a density of 9.87 ± 0.18 g/cm³ (98.7%). Our alloy was found to consist of HfZrTiTaNb-based solid solution with bcc structure as a main phase, a hexagonal closest packed (hcp) Hf/Zr-based solid solution, and Me2Fe phases (Me = Hf, Zr) as minor admixtures. Principal elements of the HEA phase were uniformly distributed over the bulk of HfTaTiNbZr-based alloy. Similar alloys synthesized without milling or in the case of low-energy ball milling (LEBM, 10 h) consisted of a bcc HEA and a Hf/Zr-rich hcp solid solution; in this case, the Vickers hardness of such alloys was found to have a value of 6.4 GPa and 5.8 GPa, respectively.

scholarly journals High-Energy Ball Milling and Spark Plasma Sintering of the CoCrFeNiAl High-Entropy Alloy

Metals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1489
Author(s):  
Alexander S. Rogachev ◽  
Nicholas A. Kochetov ◽  
Anna V. Panteleeva ◽  
Kirill V. Kuskov ◽  
Dmitry Yu. Kovalev ◽  
...  
Keyword(s):  
Ball Milling ◽  
Spark Plasma Sintering ◽  
High Energy ◽  
High Energy Ball Milling ◽  
High Entropy Alloy ◽  
X Rays ◽  
High Entropy ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Energy Ball

Nanocrystalline powder of the CoCrFeNiAl high-entropy alloy was produced by high-energy ball milling (HEBM) and consolidated by spark plasma sintering (SPS). Microstructure and crystal structure transformations occurring in the course of HEBM and SPS processes were explored by Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS) and X-Rays Diffraction (XRD) methods. Synthesized materials showed a microhardness of 4000–6000 MPa and electrical resistivity of 0.2 mΩ⋅cm at room temperature.

Structural Features of High-Entropy HfTaTiNbZr Alloy Fabricated by High-Energy Ball Milling

2020 ◽  
Vol 61 (4) ◽  
pp. 421-428
Author(s):  
A. S. Sedegov ◽  
V. S. Tsybulin ◽  
K. V. Kuskov ◽  
N. F. Shkodich ◽  
D. O. Moskovskikh
Keyword(s):  
Ball Milling ◽  
High Energy ◽  
Structural Features ◽  
High Energy Ball Milling ◽  
High Entropy ◽  
Energy Ball
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