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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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.
|Uncontrolled Keywords:||Fe-rich amorphous alloy; Rapid solidification; P-addition; Nanocomposite; Cluster plus glue atom model;Soft-magnetic;|
|Divisions:||Material Science and Technology|
|Deposited By:||Sahu A K|
|Deposited On:||26 Sep 2019 07:53|
|Last Modified:||26 Sep 2019 07:53|
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