Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5459667 | Journal of Alloys and Compounds | 2017 | 5 Pages |
Abstract
Nanocrystalline Fe81.3Co4Si0.5B9.5P4Cu0.7 alloy shows low coercivity (Hc <10 A/m), but a minor increase in Co from 4 to 5 at.% (Fe81.3Co5Si0.5B8.5P4Cu0.7) results in a drastic increase in Hc (>60 A/m). In terms of structure both the alloys in as-quenched state exhibit similar X-ray diffraction patterns (i.e. X-ray amorphous). Similar to low concentration of Co in the alloy, it is possible to realize a fine nanocrystalline structure made from bcc Fe-Co phase for higher concentration of Co. However, existence of a very few large sized crystals (above 100 nm) in as-quenched state enhances the Hc. A large numbers of bcc Fe(-Co) nuclei (â¼2-5 nm) in as-quenched state results in a high magnetic flux density (Bs) after optimum annealing. It is possible to obtain a Bs of 1.88-1.90 T in this system but it is at the cost of an increase in Hc.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Yan Zhang, Parmanand Sharma, Akihiro Makino,