Role of P on amorphization, microstructure, thermo-physical and soft magnetic properties of Fe-rich FeB(P)SiNbCu melt-spun alloys
IR@NML: CSIR-National Metallurgical Laboratory, Jamshedpur
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Title |
Role of P on amorphization, microstructure, thermo-physical and soft magnetic properties of Fe-rich FeB(P)SiNbCu melt-spun alloys
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Creator |
Murugaiyan, Premkumar
Mitra, A Patro, A K Roy, R K Churyukanovaa, Margarita Kaloshkin, S Shuvaeva, E Panda, A K |
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Subject |
Electronic and Magnetic Properties
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Description |
The influence of P on amorphizing ability, as-quenched microstructure, thermo-physical and soft magnetic properties of Fe-rich (i) Fe81B15-xPxSi2Nb1Cu1 (ii) Fe82B14-xPxSi2Nb1Cu1 and (iii) Fe83B13-xPxSi2Nb1Cu1 (x = 0, 2, 4, 6, 8 at%) melt-spun alloys are investigated. The substitution of P improves amorphization of alloys and restricts the formation of hetero-amorphous microstructure for Fe 83 at% ribbons at around (x = 8). The improvement in short range ordering of P containing clusters with varying Fe content has been discussed within the framework of Cluster-Glue atom model and supported by experimental thermal parameters. The optimal P content in Fe-rich alloys in the range of 4 <= x <= 6 delivered favourable thermal properties of high primary and secondary crystallization onset temperature viz; T-x1, T-x2 and temperature span Delta T between these onsets. The P substitution drastically restricts the precipitation of secondary crystallites with reduced enthalpy of secondary crystallisation (Delta H-2) during annealing and favourably assists in attaining maximum magnetic moment during the primary crystallization stage. Moreover, the P substitution (4-8 at%) effects refinement of alpha-Fe nanocrystallites and promotes low coercivity (H-c < 20 A/m) in nanocomposite alloys. On contrary, the P substitution linearly reduces saturation magnetization (M-s) by weakening ferromagnetic exchange coupling and ferromagnetic dilution. An optimal content of 4 at% P offers favourable combination of low H-c and High M-s in both amorphous and nanocomposite state.
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Publisher |
Elsevier
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Date |
2019-12
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Type |
Article
PeerReviewed |
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Relation |
https://doi.org/10.1016/j.jmmm.2019.165723
http://eprints.nmlindia.org/7938/ |
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Identifier |
Murugaiyan, Premkumar and Mitra, A and Patro, A K and Roy, R K and Churyukanovaa, Margarita and Kaloshkin, S and Shuvaeva, E and Panda, A K (2019) Role of P on amorphization, microstructure, thermo-physical and soft magnetic properties of Fe-rich FeB(P)SiNbCu melt-spun alloys. Journal of Magnetism and Magnetic Materials, 492 .
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