Microstructures and Soft Magnetic Properties of Fe 73.5-x Cu 1 Nb 3 Si 13.5 B 9 Gd x (x = 0-1.5) Alloys

• Published in: Materials Vol. 15; no. 9
• Main Authors: Mao, Yuchen, Zhu, Zhenghou, Zhao, Hui
• Format: Journal Article
• Language: English
• Published: Switzerland 19-04-2022
• Subjects: Fe-based nanocrystalline alloy; rare earth Gd; soft magnetic properties
• ISSN: 1996-1944; 1996-1944

In this experiment, the rare earth Gd element was added to Finemet alloy to observe the microstructure and soft magnetic properties. The experimental results showed that the samples with the addition of 0.5% Gd and 1.0% Gd can be quenched and cast normally, and the
of Fe
Cu
Nb
Si
B
Gd
alloy was 10.41% higher than that of Finemet. After annealing, crystal grains of about 10 nm were formed. The
and
values of Fe
Cu
Nb
Si
B
Gd
alloy were 25.51% and 22.23% higher, respectively, and the coercivity
was reduced by 12.19% compared to Finemet. At 1 kHz, the
value of Fe
Cu
Nb
Si
B
Gd
alloy at room temperature was 14.57% higher than that of Finemet, while the
reached 162.34 k and 142.42 k at 90 °C and 150 °C (24% and 29.51% higher, respectively). The Fe
Cu
Nb
Si
B
Gd
alloy had the best performance at 100 kHz, with higher
values than Finemet across the ambient temperature range of 30 °C to 150 °C. After tension annealing, the
values of Fe
Cu
Nb
Si
B
Gd
alloy were 20-30% higher than those of Finemet.