Title of article :
The role of alloying elements in Cu-free nanocrystalline Fe-Nb-B soft magnetic alloys
Author/Authors :
Suzuki، نويسنده , , K. and Cadogan، نويسنده , , J.M. and Sahajwalla، نويسنده , , V. and Inoue، نويسنده , , A. and Masumoto، نويسنده , , T.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 1997
Pages :
5
From page :
554
To page :
558
Abstract :
In order to clarify the role of alloying elements in Cu-free nanocrystalline Fe-Nb-B soft magnetic alloys, we have examined the kinetics of primary crystallization, the microstructure after primary crystallization, the changes in Curie temperature (Tc) and the hyperfine interactions of the amorphous phase upon primary crystallization in Fe86 − xNbxB14(x = 0, 2, 4, 5, 6 and 8) alloys. The mean grain size after primary crystallization decreased drastically in the x range 4–6 at.%. The kinetic analysis of the primary crystallization reaction showed that the decrease in the grain size can be attributed to the commencement of homogeneous nucleation. Tc of the amorphous phase increased with the B enrichment during primary crystallization. Tc decreased with Nb content and the hyperfine field distribution of the residual amorphous phase after primary crystallization for the x = 6 sample showed the presence of a non-magnetic component. These results suggest that Nb plays a role in the formation of the nanostructure by accelerating nucleation, as does B in the generation of a strong intergranular magnetic coupling, through increasing the Tc of the residual amorphous phase.
Keywords :
soft magnetic properties , Kinetics , Crystal growth , Nucleation , Fe-Nb-B , Amorphous alloys , crystallization , Nanocrystalline alloys , Mِssbauer effect
Journal title :
MATERIALS SCIENCE & ENGINEERING: A
Serial Year :
1997
Journal title :
MATERIALS SCIENCE & ENGINEERING: A
Record number :
2132781
Link To Document :
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