A study on microstructure, magnetic properties and kinetics of the nanocrystallization of Fe40Ni38B18Mo4 metglass

Srivastava, Ankit; Srivastava, D.; Dey, G.K.

doi:10.1016/j.jmmm.2006.02.249

Cited by 13 publications

(7 citation statements)

References 21 publications

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“…Depending on the heating rate, the crystallization peaks move to higher temperatures. At 40 °C/min, the crystallization peaks are placed at around 442 and 550 °C as reported by Srivastava et al [28] Other samples were annealed using the Joule heating technique, by flowing a DC electric current through its longitudinal direction at different current intensities and varying time. Also some samples were annealed by using a combined current and stress treatment.…”

Section: Introductionmentioning

confidence: 74%

Magnetic force microscopy characterization of heat and current treated Fe40Ni38Mo4B18 amorphous ribbons

García¹,

Iturriza²,

Val³

et al. 2010

Journal of Magnetism and Magnetic Materials

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ABSTRACT:The domain structure of a magnetostrictive Fe 40 Ni 38 Mo 4 B 18 amorphous ribbon has been studied using magnetic force microscopy (MFM) at room temperature. First, the evolution of the magnetic domain patterns as a function of the annealing temperature has been investigated. In samples heat treated at 250 and 450 °C for 1 h, a transformation from 90° to 180° domain wall has been clearly observed, while the sample heat treated at 700 °C for 1 h showed a magnetic phase fixed by the crystalline anisotropy. Additionally, the evolution of the magnetic domain structure by applying a DC current was recorded by the MFM technique. For current annealed samples at 1 A for 1, 30 and 60 min, a transformation between different domain patterns has been observed. Finally, in samples treated by the current annealing method under simultaneous stress, an increase of the annealing time gives rise to a different magnetic structure arising from the development of transverse magnetic anisotropy.

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Section: Introductionmentioning

confidence: 74%

Magnetic force microscopy characterization of heat and current treated Fe40Ni38Mo4B18 amorphous ribbons

García¹,

Iturriza²,

Val³

et al. 2010

Journal of Magnetism and Magnetic Materials

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“…[30] Therefore, two annealing temperatures, 430°C and 530°C, have been selected to understand the evolution behavior of the two phases. In order to examine the stability of the individual phases, samples have been treated for durations of 5 and 72 hours at each temperature.…”

Section: Discussionmentioning

confidence: 99%

Probing Phase Evolution Behavior during Nanocrystallization of Metallic Glass Using Positron Annihilation Spectroscopy

Srivastava

Dey

et al. 2009

Metall Mater Trans A

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Positron annihilation lifetime spectroscopy and coincidence Doppler broadening (CDB) techniques have been used to study the nanocrystallization behavior of soft magnetic materials, using Metglas 2826MB as an example. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) characterization techniques revealed the presence of two phases, c-(Fe,Ni) and (Fe,Ni,Mo) 23 B 6 , as well as the size and volume fraction of the phases following predetermined thermal annealing. Two distinct positron lifetime components have been observed in both amorphous and nanocrystallized samples. In the nanocrystallized samples, it has been demonstrated unambiguously that small and large lifetime components were due to positron annihilation with crystalline nanophases and with amorphous-crystalline or intercrystalline interfaces, respectively. First-principle calculation of the positron lifetime and electron momentum distribution in crystalline phases, supplemented by TEM and XRD studies, helped in the unambiguous interpretation of the experimental observation. This study throws new insights into positron behavior in metallic glasses, especially in the presence of single or multiple nanophases embedded in the amorphous matrix.

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“…Fe 40 Ni 38 Mo 4 B 18 (Metglas2826MB) amorphous alloy was the earliest magnetic material [6,7] applied to the acoustomagnetic antitheft label and received a lot of attentions and debates. Srivastava et al [8] investigated the microstructure and magnetic properties of Fe 40 Ni 38 Mo 4 B 18 at the various degrees of crystallization from the amorphous state and found that the (Fe,Ni,Mo) 23 B 6 phase and FCC (Fe,Ni) solid solution can be formed after the crystallization at the annealing temperatures around 414°C and 522°C. Szewczyk et al [9] studied the initial curve and major and minor magnetostriction hysteresis butterfly loops of the as-quenched Fe 40 Ni 38 Mo 4 B 18 amorphous alloy as a function of quasistatic magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Glass Forming Ability, Thermal Stability, and Magnetic Properties of FeCoNiBSi Alloys with Different B Contents

Sun

Wang²

2018

Advances in Materials Science and Engineering

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e dependence on the glass forming ability, magnetic property, and thermal stability of the (Fe 0.39 Co 0.15 Ni 0.46 ) 82−x B 12+x Si 6 (x � 0, 2, 4, and 6) alloys was investigated. e results show that the as-quenched alloy ribbons exhibit a completely amorphous structure with B content in the range of 12∼18 at.%. e initial crystallization onset temperature of the as-quenched ribbon increases with the increase of B content. When the B content is up to 14 at.%, the temperature interval between the two crystallization peaks will sharply reduce, which narrows the effective annealing range that is detrimental to improving the soft magnetic properties.

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A study on microstructure, magnetic properties and kinetics of the nanocrystallization of Fe40Ni38B18Mo4 metglass

Cited by 13 publications

References 21 publications

Magnetic force microscopy characterization of heat and current treated Fe40Ni38Mo4B18 amorphous ribbons

Magnetic force microscopy characterization of heat and current treated Fe40Ni38Mo4B18 amorphous ribbons

Probing Phase Evolution Behavior during Nanocrystallization of Metallic Glass Using Positron Annihilation Spectroscopy

Glass Forming Ability, Thermal Stability, and Magnetic Properties of FeCoNiBSi Alloys with Different B Contents

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