Novel single phase (Ti0.2W0.2Ta0.2Mo0.2V0.2)C0.8 high entropy carbide using ball milling followed by reactive spark plasma sintering |
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| Affiliation: | 1. School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China;2. College of Mechanical and Electronic Engineering, Pingxiang University, Pingxiang, 337000, China;3. Department of Process Engineering and Applied Science, Dalhousie University, Halifax B3J 1Z1, Canada |
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| Abstract: | Single phase novel (Ti0.2W0.2Ta0.2Mo0.2V0.2)C0.8 high entropy carbide (HEC) compacts were successfully synthesized by reactive spark plasma sintering of ball milled metal-carbon elemental mixture at temperatures of 1400?1800 °C. X-ray diffraction and element distribution maps indicated single phase carbide formation with lattice parameter ranging from 4.307 Å to 4.312 Å with small amount of TiO2. X-ray energy dispersive spectroscopy (EDS) mapping showed uniform distribution of the transition metals in the carbide phase. The microhardness, elastic modulus, fracture toughness, electrical resistivity and thermal expansion coefficient (25 °C–600 °C) of the compact sintered at 1800 °C were found to be 25.8 ± 2.8 GPa, 461 ± 36 GPa, 3.7 ± 0.4 MPa.m1/2, 7 × 10?4 Ω/m2 and 7 × 10-6 K?1 respectively. |
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| Keywords: | High entropy carbide Reactive spark plasma sintering Ball milling X-Ray diffraction Vickers hardness |
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