The melt-spun structure of a FeBCu alloy was regulated by the addition of corrosion-resistant Cr with a moderate enhancement in amorphous-forming ability, which further refines the nanostructure and improves the soft magnetic properties and corrosion resistance of corresponding nanocrystalline alloys. The results show that high-number-density α-Fe grains in size of below 10 nm are formed in the amorphous matrix of melt-spun FeBCuCr (x = 0–6) alloy ribbons, and the grain size and number density gradually decrease with the increase in Cr content. After annealing, the α-Fe average grain size () and coercivity () of corresponding nanocrystalline alloys reduce significantly with increasing x from 0 to 3, and the reduction becomes less pronounced within x = 3–6, while the saturation magnetic flux densities () steadily decreases as x increases from 0 to 6. A FeBCuCr nanocrystalline alloy with the of 14.9 nm possesses excellent comprehensive soft magnetic properties with the and of 13.8 A/m and 1.74 T, respectively. The fine nanostructure and good magnetic softness results from the optimum combination of pre-existing α-Fe competitive growth and Cr-inhibited atom diffusion. The nanocrystalline alloys show improved corrosion resistance in NaCl solution compared to their respective melt-spun precursors, and the addition of Cr further enhances the corrosion resistance. The alloyed Cr also reduces the annealing embrittlement of the nanocrystalline alloys.

中文翻译：

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Cr添加对Fe85.5B13Cu1.5纳米晶合金组织、磁性能及耐蚀性的影响

通过添加耐腐蚀的Cr来调节FeBCu合金的熔纺结构，适度增强非晶形成能力，进一步细化纳米结构，提高相应纳米晶合金的软磁性能和耐腐蚀性能。结果表明，熔纺FeBCuCr(x=0~6)合金带材的非晶基体中形成了尺寸在10 nm以下的高数密度α-Fe晶粒，且晶粒尺寸和数密度随着熔喷温度的升高而逐渐减小。 Cr含量的增加。退火后，相应纳米晶合金的α-Fe平均晶粒尺寸（）和矫顽力（）随着x从0增加到3而显着减小，并且在x = 3-6范围内减小变得不那么明显，而饱和磁通密度（ ) 随着 x 从 0 增加到 6，逐渐减小。 14.9 nm 的 FeBCuCr 纳米晶合金具有优异的综合软磁性能， 和 分别为 13.8 A/m 和 1.74 T。精细的纳米结构和良好的磁软度是预先存在的α-Fe竞争生长和Cr抑制原子扩散的最佳组合的结果。与各自的熔纺前驱体相比，纳米晶合金在 NaCl 溶液中表现出更高的耐腐蚀性，并且 Cr 的添加进一步增强了耐腐蚀性。合金化的Cr还降低了纳米晶合金的退火脆性。