Year-end Sale % OFF 
Abstract
High-entropy alloys (HEAs) with soft magnetic properties are one of the new candidate soft magnetic materials which are usually used under an alternating current (AC) magnetic field. In this work, the AC soft magnetic properties are investigated for FeCoNixCuAl (1.0 ≤ x ≤ 1.75) HEAs. The X-ray diffraction (XRD) and scanning electron microscope (SEM) show that the alloy consists of two phases, namely a face-centred cubic (FCC) phase and a body-centred cubic (BCC) phase. With increasing Ni content, the FCC phase content increased. Further research shows that the AC soft magnetic properties of these alloys are closely related to their phase constitution. Increasing the FCC phase content contributes to a decrease in the values of AC remanence (AC Br), AC coercivity (AC Hc) and AC total loss (Ps), while it is harmful to the AC maximum magnetic flux density (AC Bm). Ps can be divided into two parts: AC hysteresis loss (Ph) and eddy current loss (Pe). With increasing frequency f, the ratio of Ph/Ps decreases for all samples. When f ≤ 150 Hz, Ph/Ps > 70%, which means that Ph mainly contributes to Ps. When f ≥ 800 Hz, Ph/Ps < 40% (except for the x = 1.0 sample), which means that Pe mainly contributes to Ps. At the same frequency, the ratio of Ph/Ps decreases gradually with increasing FCC phase content. The values of Pe and Ph are mainly related to the electrical resistivity (ρ) and the AC Hc, respectively. This provides a direction to reduce Ps.
Highlights
Conventional alloys are usually based on a certain metallic element, adding a few other elements to improve the property or fine tune the performance according to different application requirements [1,2].In 2004, a new class of alloys was put forward by Cantor [3] and Yeh [4], namely high-entropy alloys (HEAs)
Based on our X-ray diffraction (XRD) result the atomic size difference with increasing Ni addition, it may have a conclusion that the increase of Ni and the decrease of the atomic size difference with increasing Ni addition, it may have a conclusion content tends to facilitate the formation of the face-centred cubic (FCC) phase in FeCoNix CuAl (1.0 ≤ x ≤ 1.75) HEAs due to that the increase of Ni content tends to facilitate the formation of the FCC phase in FeCoNixCuAl
The XRD and scanning electron microscope (SEM) results show that the alloys contain two phases, namely a body-centred cubic (BCC) phase and an FCC phase
Summary
Conventional alloys are usually based on a certain metallic element, adding a few other elements to improve the property or fine tune the performance according to different application requirements [1,2]. Zuo et al [26] showed that the CoNiMnGa HEAs had a high saturation magnetisation (Ms ) of about 115.92 emu/g, and a low coercivity (Hc ) of about 27.9 Oe. Liu et al [27] found that FeCoNi1.5 CuAl. HEA had good mechanical properties (maximum compressive strength σmax = 1725 MPa), and good direct current (DC) soft magnetic properties (Ms = 63.58 emu/g, Hc = 13.7 Oe). HEA had good mechanical properties (maximum compressive strength σmax = 1725 MPa), and good direct current (DC) soft magnetic properties (Ms = 63.58 emu/g, Hc = 13.7 Oe) These studies were basically conducted under DC magnetic conditions. (1) Our previous work showed that FeCoNiCuAl HEA had a combination of good mechanical properties and DC magnetic properties [32]. The influencing factors of Pe and Ph are discussed
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
