Research into thermochemical pressing as an alternative method for producing high-entropy alloys

This paper explores the synthesis of high-entropy alloy via thermochemical pressing, an alternative to traditional melting and powder metallurgy. Research was conducted on Al28Ni22Co17Fe15Cu10Mn8 high entropy alloy. By leveraging internal exothermic reaction energy under a 100 MPa load, thermochemical pressing facilitates rapid consolidation and phase stabilization. Thermodynamic modeling predicted a mixed FCC+BCC phase structure, supported by a high configurational entropy. Experimental validation through DSC/TG identified an exothermic synthesis peak at 495°C, with the resulting alloy maintaining thermal stability up to 900°C. Microstructural analysis revealed a fine-grained, homogeneous matrix with a porosity of 10…15%, outperforming conventional sintering. These results demonstrate thermochemical pressing as an efficient, low-energy method for producing high-quality, multicomponent high-entropy alloy with refined microstructures.