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Effect of replacing B by Zr in amorphous Co-Fe-Si-B soft magnetic alloys

Published online by Cambridge University Press:  12 March 2012

Diraviam Arvindha Babu ,
Wasif Hussain Khan ,
Jeyaramane Arout Chelvane ,
Trilochan Sahoo  and
Dilshad Akhtar
Diraviam Arvindha Babu*
Affiliation:
Defence Metallurgical Research Laboratory, Hyderabad 500 058, India
Wasif Hussain Khan
Affiliation:
National Institute of Technology, Raipur, Chattisgarh 492 010, India
Jeyaramane Arout Chelvane
Affiliation:
Defence Metallurgical Research Laboratory, Hyderabad 500 058, India
Trilochan Sahoo
Affiliation:
Proof and Experimental Establishment, Balasore, Orissa 756 025, India
Dilshad Akhtar
Affiliation:
Defence Metallurgical Research Laboratory, Hyderabad 500 058, India
*
a)Address all correspondence to this author. e-mail: darvindhababu@yahoo.com
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Abstract

Amorphous ribbons of Co69Fe7Si14B10-xZrx (x = 0, 2.5, 5, 7.5 and 10) alloys have been prepared and their structure, soft magnetic and magnetoimpedance (MI) properties have been investigated. Glass forming ability (GFA) of these alloys was calculated using GFA parameter (α = Tx/Tl) and verified by experimental results. Saturation magnetization of the amorphous ribbon decreases on replacement of B by Zr which reveals Zr has more pronounced effect in decreasing saturation magnetization. However, improvement of other soft magnetic properties (coercivity and permeability) leads to considerable increase in MI properties. Annealing leads to crystallization of Co2Si, Co2B, Co2Zr and CoSi phases causing deterioration of soft magnetic and MI properties due to the magnetic hardness of the secondary phase which arises due to the presence of magnetocrystalline anisotropy.

Keywords

Amorphous alloysGlass forming abilitySoft magnetic properties and Magnetoimpedance
Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 7 , 14 April 2012 , pp. 1080 - 1085
Copyright
Copyright © Materials Research Society 2012

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References

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