Refractory High-Entropy HfTaTiNbZr-Based Alloys by Combined Use of Ball Milling and Spark Plasma Sintering: Effect of Milling Intensity
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...
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MDPI AG
2020-09-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/10/9/1268 |
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| author | Natalia Shkodich Alexey Sedegov Kirill Kuskov Sergey Busurin Yury Scheck Sergey Vadchenko Dmitry Moskovskikh |
| author_facet | Natalia Shkodich Alexey Sedegov Kirill Kuskov Sergey Busurin Yury Scheck Sergey Vadchenko Dmitry Moskovskikh |
| author_sort | Natalia Shkodich |
| collection | DOAJ |
| description | 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 Me<sub>2</sub>Fe 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. |
| first_indexed | 2024-03-10T16:11:33Z |
| format | Article |
| id | doaj.art-53699a7bac4e4e38b47f80e3609e3bea |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T16:11:33Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-53699a7bac4e4e38b47f80e3609e3bea2023-11-20T14:23:06ZengMDPI AGMetals2075-47012020-09-01109126810.3390/met10091268Refractory High-Entropy HfTaTiNbZr-Based Alloys by Combined Use of Ball Milling and Spark Plasma Sintering: Effect of Milling IntensityNatalia Shkodich0Alexey Sedegov1Kirill Kuskov2Sergey Busurin3Yury Scheck4Sergey Vadchenko5Dmitry Moskovskikh6Center of Functional Nanoceramics, National University of Science and Technology MISIS, Moscow 119049, RussiaCenter of Functional Nanoceramics, National University of Science and Technology MISIS, Moscow 119049, RussiaCenter of Functional Nanoceramics, National University of Science and Technology MISIS, Moscow 119049, RussiaNTO IRE-POLUS, LCC, Fryazino, Moscow 141190, RussiaMerzhanov Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, Chernogolovka, Moscow 142432, RussiaMerzhanov Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, Chernogolovka, Moscow 142432, RussiaCenter of Functional Nanoceramics, National University of Science and Technology MISIS, Moscow 119049, RussiaFor 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 Me<sub>2</sub>Fe 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.https://www.mdpi.com/2075-4701/10/9/1268refractory high-entropy alloyshigh-energy ball millinglow-energy ball millingspark plasma sintering<i>bcc</i> solid solution |
| spellingShingle | Natalia Shkodich Alexey Sedegov Kirill Kuskov Sergey Busurin Yury Scheck Sergey Vadchenko Dmitry Moskovskikh Refractory High-Entropy HfTaTiNbZr-Based Alloys by Combined Use of Ball Milling and Spark Plasma Sintering: Effect of Milling Intensity Metals refractory high-entropy alloys high-energy ball milling low-energy ball milling spark plasma sintering <i>bcc</i> solid solution |
| title | Refractory High-Entropy HfTaTiNbZr-Based Alloys by Combined Use of Ball Milling and Spark Plasma Sintering: Effect of Milling Intensity |
| title_full | Refractory High-Entropy HfTaTiNbZr-Based Alloys by Combined Use of Ball Milling and Spark Plasma Sintering: Effect of Milling Intensity |
| title_fullStr | Refractory High-Entropy HfTaTiNbZr-Based Alloys by Combined Use of Ball Milling and Spark Plasma Sintering: Effect of Milling Intensity |
| title_full_unstemmed | Refractory High-Entropy HfTaTiNbZr-Based Alloys by Combined Use of Ball Milling and Spark Plasma Sintering: Effect of Milling Intensity |
| title_short | Refractory High-Entropy HfTaTiNbZr-Based Alloys by Combined Use of Ball Milling and Spark Plasma Sintering: Effect of Milling Intensity |
| title_sort | refractory high entropy hftatinbzr based alloys by combined use of ball milling and spark plasma sintering effect of milling intensity |
| topic | refractory high-entropy alloys high-energy ball milling low-energy ball milling spark plasma sintering <i>bcc</i> solid solution |
| url | https://www.mdpi.com/2075-4701/10/9/1268 |
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