Open Access
Refractory High-Entropy HfTaTiNbZr-Based Alloys by Combined Use of Ball Milling and Spark Plasma Sintering: Effect of Milling Intensity
3
NTO IRE-POLUS, LCC, Fryazino, Moscow 141190, Russia
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Publication type: Journal Article
Publication date: 2020-09-20
Metals and Alloys
General Materials Science
Abstract
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.
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(35%)
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Shkodich N. et al. Refractory High-Entropy HfTaTiNbZr-Based Alloys by Combined Use of Ball Milling and Spark Plasma Sintering: Effect of Milling Intensity // Metals. 2020. Vol. 10. No. 9. p. 1268.
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Shkodich N., Sedegov A., Kuskov K. V., Busurin S., Scheck Y., Vadchenko S., Moskovskikh D. O. Refractory High-Entropy HfTaTiNbZr-Based Alloys by Combined Use of Ball Milling and Spark Plasma Sintering: Effect of Milling Intensity // Metals. 2020. Vol. 10. No. 9. p. 1268.
Cite this
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TY - JOUR
DO - 10.3390/met10091268
UR - https://www.mdpi.com/2075-4701/10/9/1268
TI - Refractory High-Entropy HfTaTiNbZr-Based Alloys by Combined Use of Ball Milling and Spark Plasma Sintering: Effect of Milling Intensity
T2 - Metals
AU - Shkodich, Natalia
AU - Sedegov, Alexey
AU - Kuskov, Kirill Vasilevich
AU - Busurin, Sergey
AU - Scheck, Yury
AU - Vadchenko, Sergey
AU - Moskovskikh, Dmitry O.
PY - 2020
DA - 2020/09/20
PB - MDPI
SP - 1268
IS - 9
VL - 10
SN - 2075-4701
ER -
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@article{2020_Shkodich,
author = {Natalia Shkodich and Alexey Sedegov and Kirill Vasilevich Kuskov and Sergey Busurin and Yury Scheck and Sergey Vadchenko and Dmitry O. Moskovskikh},
title = {Refractory High-Entropy HfTaTiNbZr-Based Alloys by Combined Use of Ball Milling and Spark Plasma Sintering: Effect of Milling Intensity},
journal = {Metals},
year = {2020},
volume = {10},
publisher = {MDPI},
month = {sep},
url = {https://www.mdpi.com/2075-4701/10/9/1268},
number = {9},
pages = {1268},
doi = {10.3390/met10091268}
}
Cite this
MLA
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Shkodich, Natalia, et al. “Refractory High-Entropy HfTaTiNbZr-Based Alloys by Combined Use of Ball Milling and Spark Plasma Sintering: Effect of Milling Intensity.” Metals, vol. 10, no. 9, Sep. 2020, p. 1268. https://www.mdpi.com/2075-4701/10/9/1268.