Magnetic and microstructural properties of the mechanically alloyed Fe57Co21Nb7B15 powder mixture

Souilah, S.; Alleg, S.; Djebbari, C.; Bensalem, R.; Suñol, J.J.

doi:10.1016/j.matchemphys.2011.12.010

Cited by 26 publications

(19 citation statements)

References 19 publications

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“…Furthermore, the increase of Si, B, and Nb nonmagnetic atoms as nn and/or nnn results in a decrease in the α-Fe hyperfine magnetic field. In fact, the presence of one Si atom as nn or nnn decreases B by 2.7 and 1.12 T [24], respectively, while the presence of one B or Nb atom reduces Bby about 3 T [25]. Also, as the number of Si and B atoms as nearest neighbors' increases, the s electron charge density of Fe sites is reduced and therefore IS increases.…”

Section: Hyperfine Structurementioning

confidence: 97%

“…Furthermore, the presence of one B atom in the vicinity of Fe atoms increases the IS by about 0.07 mm/s. Nonetheless, the presence of one Nb atom in the first or second neighbor shell of Fe reduces IS by 0.04 mm/s [25]. Hence, the rapid change of IS, corresponding to metal rich sites, can indicate a preferential location of Si and B atoms in the neighboring of the metal rich sites.…”

Section: Hyperfine Structurementioning

confidence: 98%

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Microstructural, Hyperfine, and Magnetic Properties of FeSiBCuNb Deposits

Alleg

Hamza

Ibrir

et al. 2015

J Supercond Nov Magn

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Mechanically alloyed Fe 73.5 Si 13.5 B 9 Nb 3 Cu 1 powders were used as feedstock materials for depositing nano/amorphous coatings by high-velocity oxy-fuel thermal spraying process. Morphology, structure, microstructure, hyperfine, and magnetic properties have been investigated by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, Mössbauer spectrometry, and vibrating sample magnetometer. The coating structure consists of bcc Fe(B)-type, bcc Fe(Si)-type, and amorphous phases. The crystallite sizes of Fe(Si) and Fe(B) solid solutions increase after spraying to about (72-82) and (48-81) nm, respectively. The Mössbauer spectrometry results reveal the presence of Fe 2 B boride. The squareness ratio M r /M s and the coercivity values of the coatings decrease with increasing the number of passes.

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Section: Hyperfine Structurementioning

confidence: 97%

Section: Hyperfine Structurementioning

confidence: 98%

Microstructural, Hyperfine, and Magnetic Properties of FeSiBCuNb Deposits

Alleg

Hamza

Ibrir

et al. 2015

J Supercond Nov Magn

Self Cite

View full text Add to dashboard Cite

show abstract

“…corresponds to the ratio between the area under the peak of the isothermal DSC trace, at different times, and the total area. Such analysis was conducted on the phase transformation mechanisms in many mechanically alloyed powders since the milling process occurs at ambient temperature for different milling durations [26][27][28][29][30][31]. If the Kolmogorov-Johnson-Mehl-Avrami analysis is valid, the value of should not change with either the volume fraction transformed, V or the temperature of transformation.…”

Section: Isothermal Transformationmentioning

confidence: 99%

“…%) powders has been deduced from the Mössbauer spectrometry results by following the variation of the α-Fe transformed fraction as a function of milling time [27]. The amorphization process can be described by one stage with an Avrami parameter of about n~1 (Fig.…”

Section: Fe279nb22b699 Mixturementioning

confidence: 99%