Structure and magnetic properties of Al-Cu-Fe-Ni-Si multicomponent films obtained by splat-quenching

摘要

The paper explores the structure, phase composition and magnetic properties of multicomponent high-entropy Al-Cu-Fe-Ni-Si films. This alloy system is characterized by the absence of expensive components, such as Co, V, Mo, Cr, usually used for the production of high-entropy alloys while its characteristics are not inferior to those of more expensive alloys. The films were fabricated by the known technique of splat-quenching. A cooling rate estimated by film thickness was ~ 106 K/s. Experimental results reveal that the studied films except the Al0.5CuFeNi one are multiphase, nanocrystalline, with the structure consisting of disordered BCC and FCC solid solutions. The Al0.5CuFeNi film has only FCC phase. The leading role in determining the type of solid solution formed in the studied high-entropy films obviously plays an element with the highest melting point. All of the investigated multicomponent films are soft-magnetic materials as indicated by low values of coercivity.