Spark plasma sintering behavior of TaNbHfZrTi high-entropy alloy powder synthesized by hydrogenation-dehydrogenation reaction

2021 ◽  
Vol 130 ◽  
pp. 107077
Author(s):  
Ki Beom Park ◽  
Jae-Young Park ◽  
Young Do Kim ◽  
Tae-Wook Na ◽  
Chan Bin Mo ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Alloy Powder ◽  
Sintering Behavior ◽  
High Entropy Alloy ◽  
Dehydrogenation Reaction ◽  
High Entropy ◽  
Plasma Sintering ◽  
Spark Plasma

scholarly journals Phases, Microstructures and Mechanical Properties of CoCrNiCuZn High-Entropy Alloy Prepared by Mechanical Alloying and Spark Plasma Sintering

Entropy ◽  
2019 ◽  
Vol 21 (2) ◽  
pp. 122 ◽  
Author(s):  
Yuchen Sun ◽  
Boren Ke ◽  
Yulin Li ◽  
Kai Yang ◽  
Mingqi Yang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Alloying ◽  
Spark Plasma Sintering ◽  
Alloy Powder ◽  
High Entropy Alloy ◽  
Face Centered Cubic ◽  
High Entropy ◽  
Plasma Sintering ◽  
Different Temperatures ◽  
Spark Plasma

In the study, an equiatomic CoCrNiCuZn high-entropy alloy (HEA) was prepared by mechanical alloying (MA) and the phases, microstructures, and thermal properties of the alloy powder were explored. The results suggest that a solid solution with body-centered cubic (BCC) phase and a crystalline size of 10 nm formed after 60 h of milling. Subsequently, the alloy powder was consolidated by spark plasma sintering (SPS) at different temperatures (600 °C, 700 °C, 800 °C, and 900 °C). Two kinds of face-centered cubic (FCC) phases co-existed in the as-sintered samples. Besides, Vickers hardness and compressive strength of the consolidated alloy sintered at 900 °C were respectively 615 HV and 2121 MPa, indicating excellent mechanical properties.

scholarly journals Spark Plasma Sintering of CoCrFeMnNi High-entropy Alloy Powders Produced by Mechanical Alloying

Materia Japan ◽  
2018 ◽  
Vol 57 (7) ◽  
pp. 333-337
Author(s):  
Soo-Hyun Joo ◽  
Takeshi Wada ◽  
Hidemi Kato ◽  
Soon-Jik Hong ◽  
Hyoung Seop Kim
Keyword(s):  
Mechanical Alloying ◽  
Spark Plasma Sintering ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Plasma Sintering ◽  
Spark Plasma

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.

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