Continuous synthesis of high-entropy alloy nanoparticles by in-flight alloying of elemental metals.

ABSTRACT: High-entropy alloy (HEA) nanoparticles (NPs) exhibit unusual combinations of functional properties. However, their scalable synthesis remains a significant challenge requiring extreme fabrication conditions. Metal salts are often employed as precursors because of their low decomposition temperatures, yet contain potential impurities. Here, we propose an ultrafast (< 100 ms), one-step method that enables the continuous synthesis of HEA NPs directly from elemental metal powders via in-flight alloying. A high-temperature plasma jet ( > 5000 K) is employed for rapid heating/cooling (10³ - 10⁵K s^-1), and demonstrates the synthesis of CrFeCoNiMo HEA NPs ( ~ 50 nm) at a high rate approaching 35 g h^-1 with a conversion efficiency of 42%. Our thermofluid

SUBMITTER: Kim KS 

PROVIDER: S-EPMC10873330 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature