Abstract
The influence of P content on amorphous forming ability and the magnetic characteristics were investigated in the FeBNbP nanocrystalline alloys using metallic ribbons. The Fe84-xB9Nb7Px(x=0-3) and Fe80B10Nb7P3 nanocrystalline alloy metallic ribbons prepared by a single-roller melt-spinning method. The Fe84-xB9Nb7Px (x=0-3) and Fe80B10Nb7P3 nanocrystalline alloys annealed at 873-923 K consist of stable α-Fe grain formed in a residual amorphous phase, and the nanocrystal α-Fe grain showed the average diameter from 6.3 to 7.7 nm. The critical thickness of ribbons indicating amorphous forming ability was increased from 20 μm to 68.7 μm with Fe81B9Nb7P3 by increasing P content. The Fe81B9Nb7P3 alloy also exhibited a high saturation magnetic flux density, Bs, of 1.51 T. In addition, Fe81B9Nb7P3 alloy indicated a good magnetic softness with a low coercivity, Hc, of 4.8 A/m. The Fe80B10Nb7P3 alloy increasing B content succeeded to obtain the powder with precursor of a stable amorphous phase by rapid quenching gas atomization method.
Highlights
Soft magnetic materials are widely used for magnetic core of inductive components in electric devices
The nanocrystalline alloys are composed of nano size α-Fe grain and residual amorphous phase by heat treating the precursor for crystallization
We report about good soft magnetic characteristics of the FeNbBP type nanocrystalline alloy as metallic ribbon and obtaining the nanocrystalline alloy powder with stable amorphous phase
Summary
Soft magnetic materials are widely used for magnetic core of inductive components in electric devices. The alloys exhibit good magnetic softness with high Bs derived from α-Fe. a precursor of nanocrystalline alloys is need to exhibit stable amorphous phase to obtain the excellent magnetic characteristics. The metallic ribbons are prepared by a single-roller melt-spinning method with high cooling rate (106 K/sec) and the stable amorphous phase precursor can be obtained. The powder with stable amorphous phase precursor is difficult to be produced due to the low cooling rate of atomization method compared with the single-roller method. The commercial nanocrystalline alloy powder with FeSiBNbCu has high amorphous forming ability (AFA) compared with FeNbB type nanocrystalline alloys but unsuitable for miniaturization of inductive components due to low Bs of 1.2 T. We report about good soft magnetic characteristics of the FeNbBP type nanocrystalline alloy as metallic ribbon and obtaining the nanocrystalline alloy powder with stable amorphous phase We have already reported that AFA of FeNbBP nanocrystalline alloys improved by addition of P in thin film method. In this paper, we report about good soft magnetic characteristics of the FeNbBP type nanocrystalline alloy as metallic ribbon and obtaining the nanocrystalline alloy powder with stable amorphous phase
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call