Optimization of crystallization behavior and soft magnetic properties of the Si-free Fe-B-P-C-Cu nanocrystalline alloys by Cu content tuning

Fe‐Based Amorphous Alloy Coatings: A Review

“…The simultaneous addition of Mo and Cu has been also found to increase the AFA even in Fe-rich compositions and reduce the grain size of bcc-Fe in Fe 84 B 8 P 3.5 Mo 2 Cu 1 , leading to a new soft magnetic alloy with more appropriate properties. [88] The critical role of Cu in the nanocrystallization process in Fe-Si-B AA is also observed by Alvarez et al [97] and Li et al [98] Adding small amounts of Cu with Nb and P in Fe-Si-B amorphous develops a uniform nanocrystalline microstructure and excellent soft magnetic properties after annealing owing to the increased amounts of Cu. [97] Introducing Cu leads to the nucleation of α-FeðSiÞ nanoclusters with a size of several nanometers in the amorphous matrix, which controls the initial crystal density and affects the grain size of annealed nanocrystalline alloys significantly.…”

“…The simultaneous addition of Mo and Cu has been also found to increase the AFA even in Fe‐rich compositions and reduce the grain size of bcc‐Fe in , leading to a new soft magnetic alloy with more appropriate properties. [ 88 ] The critical role of Cu in the nanocrystallization process in Fe–Si–B AA is also observed by Alvarez et al [ 97 ] and Li et al [ 98 ] Adding small amounts of Cu with Nb and P in Fe–Si–B amorphous develops a uniform nanocrystalline microstructure and excellent soft magnetic properties after annealing owing to the increased amounts of Cu. [ 97 ] Introducing Cu leads to the nucleation of …”

“…Nb inhibits the growth of such nanoclusters, resulting in creating a nanocrystalline structure. [ 97,98 ] Adding [ 1,7 ] in AA produces a large number of crystals related to with nucleation sites, resulting in releasing internal stresses and growing crystals after annealing. Then, the aforementioned process improves soft magnetic properties and preserves excellent ductility by increasing B s and μ e to 1.80 T and 14 100, decreasing H c to 9.4 A m −1 , and reducing ε f to 2.39%, respectively, leading to high‐performance electromagnetic applications.…”

Effects of adding B element on amorphous forming ability, magnetic properties, and mechanical properties of FePBCCu alloy

“…晶薄带的自由面XRD图谱. 由图可知, 当甩带速 率为45 m/s时, B0合金图谱中在衍射角2q = 65.5 o 附近观察到明显的晶化衍射峰, 该特征峰被证实是 非晶表面晶化导致的结果 [18,19] , 同速率下, B7合金 [20,21] . 此外, 相比B0合金, B7合金非 [22,23] .…”