Magnetic properties of Fe74.5-xCuxTa3Si13.5B9 as-quenched ribbons

作者：Li Bo^*; Hu Jifan; Qin Hongwei; Li Lun

来源：Materials Transactions, 2008, 49(8): 1757-1759.

DOI：10.2320/matertrans.MRA2008058

• nanocrystalline ribbon
• as quenched state
• permeability
• magnetostriction
• magnetoimpedance

Fe74.5-xCuxTa3Si13.5B9 nanocrystalline ribbons with appropriate Cu contents can be prepared without annealing processes. The Fe74.5-xCuxTa3Si13.5B9 as-quenched ribbons with lower Cu contents (x <= 1.5) consist of amorphous structure. The nucleation of alpha-Fe(Si) enhances with the increase of Cu content. An optimal Cu addition for obtaining the largest permeability, smallest saturation magnetostriction and largest magnetoimpedance occurs at x approximate to 3. For as-quenched ribbons with high Cu contents (x >= 3.5), soft magnetic properties deteriorate due to the drop of nucleation of alpha-Fe(Si) and the precipitation of Fe-B phases. For as melt-spun Fe71.5Cu3Ta3Si13.5B9 (x = 3) nanocrystalline ribbon prepared with wheel speed of 40 ms(-1), the average grain-size of alpha-Fe(Si) is about 10.5 nm. the initial permeability mu' is about 35000, the saturation magnetostriction lambda(s) is less than 1 X 10(-6), and the maximum value of magnetoimpedance Delta Z/Z(0) under a field of 7162 A/m is -12.88% at 2 MHz.

• 出版日期2008-8
• 单位山东大学