The effect of Ti on the sintering and mechanical properties of refractory high-entropy alloy TixWTaVCr fabricated via spark plasma sintering for fusion plasma-facing materials

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The synthesis and characterization of TixWTaVCr alloys for high-temperature and fusion plasma-facing applications are presented in this study. Specimens of TixWTaVCr containing 0 to 7 at% Ti were prepared via spark plasma sintering of an elemental powder mixture at 1500 °C. Characterization of sintered samples via X-ray diffraction and scanning electron microscopy with energy dispersive spectroscopy revealed increased formation of a BCC solid solution due to the addition of up to 7 at% Ti. Mechanical characterizations of the TixWTaVCr alloys indicate that they are harder and stronger than several reported high-entropy alloys. The alloy that contained 7 at% Ti also exhibited improved oxidation resistance in air at 1000 °C. Its improved strength, hardness, and oxidation resistance suggest future applications for this high-entropy alloy in high-temperature and nuclear applications.
Publisher
ELSEVIER SCIENCE SA
Issue Date
2018-05
Language
English
Article Type
Article
Keywords

OXIDATION BEHAVIOR; CARBON CONTAMINATION; PHASE-EQUILIBRIA; MICROSTRUCTURE; NB; COMPOSITE; SYSTEM; SPINEL; STEELS; SPS

Citation

MATERIALS CHEMISTRY AND PHYSICS, v.210, pp.87 - 94

ISSN
0254-0584
DOI
10.1016/j.matchemphys.2017.06.054
URI
http://hdl.handle.net/10203/241562
Appears in Collection
MS-Journal Papers(저널논문)NE-Journal Papers(저널논문)
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