| abstract |
The invention discloses a method for preparing micro-nano medium-entropy and high-entropy materials by laser ablation. 1) Precursors fitted to each element in the medium-entropy or high-entropy materials are uniformly dissolved in an equimolar ratio or a nearly equimolar ratio in a solvent, and then drop-coated onto the substrate and evaporated to dryness; 2) the substrate in step (1) is transferred to a container (beaker), and processed by laser in a liquid phase environment. Achieving rapid chemical transformation of precursor mixtures to medium-entropy or high-entropy materials. The method has the advantages of simple operation, low cost, mild reaction conditions, rapidity and high efficiency, environmental protection and no pollution. The technology of the present invention can realize the loading of medium-entropy and high-entropy materials including alloys and ceramics on any material substrate, and can realize the medium-entropy and high-entropy materials from nanometer to micrometer size by adjusting the experimental conditions such as laser parameters and liquidus temperature. Synthesis. |