Solid solution formation during spark plasma sintering of ZrB2–TiC–graphite composites

2020 ◽  
Vol 46 (3) ◽  
pp. 2923-2930 ◽  
Author(s):  
Hamid Istgaldi ◽  
Mehdi Shahedi Asl ◽  
Peyman Shahi ◽  
Behzad Nayebi ◽  
Zohre Ahmadi
Keyword(s):  
Solid Solution ◽  
Spark Plasma Sintering ◽  
Solid Solution Formation ◽  
Solution Formation ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Graphite Composites

Sintering behaviour, solid solution formation and characterisation of TaC, HfC and TaC–HfC fabricated by spark plasma sintering

2016 ◽  
Vol 36 (7) ◽  
pp. 1539-1548 ◽  
Author(s):  
Omar Cedillos-Barraza ◽  
Salvatore Grasso ◽  
Nasrin Al Nasiri ◽  
Daniel D. Jayaseelan ◽  
Michael J. Reece ◽  
...  
Keyword(s):  
Solid Solution ◽  
Spark Plasma Sintering ◽  
Solid Solution Formation ◽  
Solution Formation ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Sintering Behaviour

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.

Microstructural characterization and mechanical behaviours of TiN-graphite composites fabricated by spark plasma sintering

2020 ◽  
Vol 91 ◽  
pp. 105253
Author(s):  
Ojo Jeremiah Akinribide ◽  
Babatunde Abiodun Obadele ◽  
Samuel Olukayode Akinwamide ◽  
Olusola Olaitan Ayeleru ◽  
Mehdi Eizadjou ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Microstructural Characterization ◽  
Plasma Sintering ◽  
Mechanical Behaviours ◽  
Spark Plasma ◽  
Graphite Composites

Microstructures and Mechanical Properties of Consolidated Mg-Zn-Y Alloy

2007 ◽  
Vol 534-536 ◽  
pp. 833-836 ◽  
Author(s):  
J.K. Lee ◽  
Taek Soo Kim ◽  
Ha Guk Jeong ◽  
Jung Chan Bae
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Spark Plasma Sintering ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Solid Solution Matrix ◽  
Solution Matrix ◽  
Consolidation Temperature

The microstructure and mechanical properties of the Mg97Zn1Y2 alloy prepared by spark plasma sintering of gas atomized powders have been investigated. After consolidation, precipitates were observed to form in the α-Mg solid solution matrix of the Mg97Zn1Y2 alloy. These precipitates consisted of Mg12YZn and Mg24Y5 phases. The density of the consolidated bulk Mg-Zn-Y alloy was 1.86 g/cm3. The ultimate tensile strength and elongation were dependent on the consolidation temperature, which were in the ranges of 280 to 293 MPa and 8.5 to 20.8 %, respectively.

Solid solution synthesis of tantalum carbide-hafnium carbide by spark plasma sintering

2017 ◽  
Vol 100 (5) ◽  
pp. 1853-1862 ◽  
Author(s):  
Cheng Zhang ◽  
Ankur Gupta ◽  
Sudipta Seal ◽  
Benjamin Boesl ◽  
Arvind Agarwal
Keyword(s):  
Solid Solution ◽  
Spark Plasma Sintering ◽  
Tantalum Carbide ◽  
Hafnium Carbide ◽  
Solution Synthesis ◽  
Plasma Sintering ◽  
Spark Plasma

scholarly journals Nickel-graphite composites of variable architecture by graphitization-accompanied spark plasma sintering and hot pressing and their response to phase separation

2015 ◽  
Vol 47 (3) ◽  
pp. 237-248 ◽  
Author(s):  
D.V. Dudina ◽  
A.V. Ukhina ◽  
B.B. Bokhonov ◽  
V.I. Mali ◽  
A.G. Anisimov ◽  
...  
Keyword(s):  
Particle Size ◽  
Spatial Distribution ◽  
Phase Separation ◽  
Spark Plasma Sintering ◽  
Hot Pressing ◽  
Porous Structures ◽  
Plasma Sintering ◽  
Porous Graphite ◽  
Spark Plasma ◽  
Graphite Composites

We report the formation and phase separation response of nickel-graphite composites with variable-architecture phases by graphitization-accompanied consolidation via Spark Plasma Sintering and hot pressing. It was shown that the application of pressure during consolidation is crucial for the occurrence of graphitization and formation of 3D graphite structures. We evaluated the suitability of the synthesized composites as precursors for making porous structures. Nickel behaved as a space holder with the particle size and spatial distribution changing during consolidation with the temperature and determining the structure of porous graphite formed by phase separation by dissolution in HCl. The response of the consolidated Ni-Cgr to separation of carbon by its burnout in air was studied. The result of the carbon removal was either the formation of a dense and continuous NiO film on the surface of the compacts or oxidation through the compact thickness. The choice between these two options depended on the density of the compacts and on the presence of carbon dissolved in nickel. It was found that during the burnout of graphite from Ni-Cgr composites, sintering, rather than formation of pores, dominated.

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