Journal
CERAMICS INTERNATIONAL
Volume 45, Issue 17, Pages 22437-22441Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2019.07.244
Keywords
Precursor-derived ceramics; High-entropy materials; Transition metal carbide; Nanopowders
Categories
Funding
- National Natural Science Foundation of China [51602324, 51532009, 11575275]
- China Postdoctoral Science Foundation [2019M651323]
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We report a simple liquid precursor method for the synthesis of single-phase high-entropy carbide (HEC) nanopowders. Transition metal halides (TiCl4, ZrCl4, HfCl4, NbCl5, TaCl5) and furfuryl alcohol are used as metal sources and carbon source. The liquid precursor can be converted into mixtures of five binary carbides via carbothermal reduction at 1400 degrees C in vacuum, and can be further transformed into single-phase HEC nanopowders through solid solution formation by heat treatment at 2000 degrees C. The as-synthesized HEC nanopowders possess an average particle size of 132 +/- 5 nm, a specific surface area of 24.5 m(2)/g, and an oxygen content of 0.22 wt%, respectively.
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