Abstract
The microstructure, phase formation, thermal stability and soft magnetic properties of melt-spun high entropy alloys (HEAs) Fe27Co27Ni27Si10−xB9Lax with various La substitutions for Si (x = 0, 0.2, 0.4, 0.6, 0.8, and 1) were investigated in this work. The Fe27Co27Ni27Si10−xB9La0.6 alloy shows superior soft magnetic properties with low coercivity Hc of ~7.1 A/m and high saturation magnetization Bs of 1.07 T. The content of La has an important effect on the primary crystallization temperature (Tx1) and the secondary crystallization temperature (Tx2) of the alloys. After annealing at relatively low temperature, the saturation magnetization of the alloy increases and the microstructure with a small amount of body-centered cubic (BCC) phase embedded in amorphous matrix is observed. Increasing the annealing temperature reduces the magnetization due to the transformation of BCC phase into face-centered cubic (FCC) phase.
Highlights
Introduction of La on ThermalStability, PhaseHigh entropy alloys (HEAs), defined as the alloys consisting of at least five principal elements without obvious base element, have been proposed by Cantor et al [1] and Yeh et al [2] in 2004, independently
The rare earth elements (RE) have been frequently employed in the soft magnetic alloys [20,21], and the results showed that the addition of RE element of the as
It is reported that high entropy alloys (HEAs) trend to form simple fcc and/or bcc solid solution structure
Summary
The ingots were melted times to ensure chemical homogeneity. ~0.025 mm were prepared by single-roller melt spinning method characterized by X‐ray diffraction (XRD) with Cu Kα radiation. Thermal stability wa with the wheel speeds of scanning. Thermal stability was studied by differential argon atmosphere. The saturation magnetization (Bs) of ribbons were measured under an scanning calorimetry (DSC) at a heating rate of 10 K/min and under argon atmosphere. Applied field of 250 kA/m with a vibrating sample magnetometer (VSM). The saturation magnetization (Bs ) of ribbons were measured under an applied field of force (Hc) with was measured a MATS‐2010SD hysteresis curve (DC). Measured with a MATS-2010SD hysteresis curve (DC) test system using ribbons about
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