Effect of Alsi Variation on the Evolution of Microstructure and Magnetic Properties of Feconi(Alsi)X High-Entropy Alloy

Abstract

This study aimed to design and prepare FeCoNi (AlSi)x high-entropy alloy (HEA) soft magnetic powder and bulk via mechanical alloying and spark plasma sintering(SPS), and to investigate the effects of AlSi variations on the microstructure evolution and soft magnetic properties of HEAs. A decrease in AlSi content promoted the precipitation of stratification faults (SFs) and twins from the face-centered cubic matrix. The addition of AlSi nonmagnetic elements and the formation of SFs and twins had obvious effects on the magnetic properties of the HEA. FeCoNi(AlSi)0.4 had excellent soft magnetic properties with 140.2 emu/g magnetic saturation (Ms) and 1.35 Oe coercivity field (Hc).

Keywords: Powder technology, Magnetic materials, Microstructure, High-entropy alloys, Properties