Facile and economical routes toward novel high-entropy metal nitride high-temperature ceramic nanograin powders.

Authors :: Xing, Junheng
Foroughi, Paniz
Mondal, Santanu
Sun, Shichen
Cheng, Zhe
Source :: MRS Communications; Apr2022, Vol. 12 Issue 2, p183-187, 5p
Publication Year :: 2022
Abstract: A facile modified soft-urea route is employed for the direct synthesis of high-entropy metal nitride powders. Low-cost metal chlorides and urea are mixed without organic solvent, and the mixture is thermally treated under N<subscript>2</subscript> flow. Both ternary (Hf<subscript>0.5</subscript>Ta<subscript>0.5</subscript>)N and the five metal high-entropy (Hf<subscript>0.2</subscript>Ta<subscript>0.2</subscript>Zr<subscript>0.2</subscript>Nb<subscript>0.2</subscript>V<subscript>0.2</subscript>)N synthesized are single-phase solid-solution fine powders. The study provides an effective method for synthesis of multi-component, including high-entropy, metal nitride powders. Further investigation is needed to improve the control of materials' exact stoichiometry, phase, and microstructure and reveal the new materials' chemical/physical properties for various potential applications such as energy and catalysis. [ABSTRACT FROM AUTHOR]

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