Effect of static magnetic field on microstructure and interdiffusion behavior of Fe/Fe–Si alloy diffusion couple

Fan, Lijun; Zhong, Yunbo; Xu, Yueyang; Zheng, Tianxiang; Ren, Zhongming

doi:10.1016/j.jallcom.2015.04.226

Cited by 13 publications

(6 citation statements)

References 18 publications

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“…Therefore, the angle between DD and MFD (whether 0° or 180°) does not affect the experimental results. A similar conclusion to the one obtained here was obtained by studies that investigated the effect of a high magnetic field on the diffusion process [ 5 , 6 , 7 , 10 , 11 , 12 , 13 , 14 ]. They suggested that atomic diffusivity is affected by the frequency factor rather than the activation energy.…”

Section: Discussionsupporting

confidence: 90%

“…They suggested that atomic diffusivity is affected by the frequency factor rather than the activation energy. The vibration frequency, v, of the atoms and the diffusion atomic-jump length, a, would not significantly change under a high magnetic field [ 13 , 17 ], and hence, the increase in the cobalt diffusivity is mainly associated with the increase in the diffusion entropy under a high magnetic field. In addition, the natural logarithm of the cobalt diffusivity increased linearly with the increase in the magnetic field intensity ( Figure 5 ); thus, the diffusion entropy should have a linear relationship with the magnetic field intensity.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, research on this subject has been focused on the effect of high magnetic fields on the atomic diffusion of diffusion couples in the paramagnetic/paramagnetic states (Al/Mg [ 5 , 6 ], Ni/Al [ 7 ], Ti/Ni [ 8 ], and Ti/Fe [ 9 ]) and paramagnetic/diamagnetic states (Al/Al–3% Cu [ 10 ], Cu/Ni [ 11 , 12 ], Fe/Fe–50 wt.% Si [ 13 ], Fe/Fe–20 wt.% Si [ 14 ]). Several studies [ 5 , 7 , 10 , 11 , 13 ] have suggested that a high magnetic field restrains atomic diffusion when the diffusion direction is perpendicular to the magnetic field. Other studies [ 6 , 12 , 14 ] have revealed that a high magnetic field parallel to the diffusion direction promotes the diffusion process.…”

Section: Introductionmentioning

confidence: 99%

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Diffusion in Copper/Cobalt Systems under High Magnetic Fields

2021

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Comprehensive research on a high magnetic field’s effect on diffusion is lacking; hence, this study investigates the effect of the magnetization of such a field on diffusion using a copper/cobalt diffusion couple in the diamagnetic/ferromagnetic states, respectively. The diffusion couple was formed using explosive welding to avoid diffusion during manufacturing. The diffusion couple annealed within a temperature range of 1165 –1265 K under a 0–6-T high magnetic field. The angle between the diffusion and magnetic field directions was set as 0° and then 180°. The penetration profiles of cobalt volume diffusion in the copper and grain-boundary diffusion of copper in cobalt were constructed using an electron probe micro analyzer. The high magnetic field increased the volume diffusivity of cobalt in copper, but had no evident effect on the grain-boundary diffusivity of copper in cobalt, irrespective of the magnetic field direction. An Arrhenius plot of the cobalt volume diffusivity in copper demonstrated that the applied high magnetic field enhanced diffusion by changing the frequency factor rather than the activation energy; this can be attributed to the increased diffusion entropy caused by changing the vacancy concentration, which resulted from the introduction of magnetization under a high magnetic field.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Diffusion in Copper/Cobalt Systems under High Magnetic Fields

2021

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“…In previous paper, it was found that the static 0.8 T magnetic field exhibits a suppressing effect on interdiffusion behavior of Fe-Fe50wt.%Si diffusion couples because of the decreased thickness of FeSi and solid solution layer 19 . Different kinds of silicides can easily form when the Si content is higher than 10 wt.%, and now the low Si diffusion couple has been designed to avoid the formation of Fe 3 Si, Fe 2 Si, and FeSi diffusion layers.…”

Section: Introductionmentioning

confidence: 98%

Promoted diffusion mechanism of Fe2.7wt.%Si-Fe10wt.%Si couples under magnetic field by atomic-scale observations

Fan

Zhong

et al. 2019

Sci Rep

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Diffusion behavior of newly designed Fe2.7wt.%Si-Fe10wt.%Si couples at 1100 °C for up to 12 h has been investigated under the 0, 0.8 and 3 T magnetic fields. Diffusion thickness of solid solution layer and weight percent of Si on Fe2.7wt.%Si side increase significantly under a magnetic field. Application of a magnetic field promotes the diffusion of solid solution layer through the possible diffusion of vacancies mainly due to the appearance of defects, which has been demonstrated by the increased dislocation density and broadening of the typical XRD peaks. Replacement of Si sits by Fe atoms in the crystal structure leads to the appearance of Fe diffraction peaks, which has been confirmed by the increased interplanar spacings under a magnetic field. The magnetic field benefits the depinning of dislocations and leads to higher dislocation density because of the magnetoplastic effect which has been confirmed by the significantly reduced thickness of Fe2.7wt.%Si. Nano-sized Fe3Si particles precipitate in the matrix with an orientation relationship on Fe10wt.%Si side as {220}Fe3Si || {220}matrix & < 1–10 >Fe3Si || < 1–10 >matrix. Fe3Si particles pin dislocation moving and lead to higher dislocation density.

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“…The textured crystal growth of Bi-2201 [11] and Bi (Pb)2212 [12] has also been observed in a strong magnetic field. Moreover, in a sufficiently strong magnetic field, the nucleation, [13] surface tension, [14] and even the diffusion of atoms [15] can be influenced. Therefore, the effect of a strong magnetic field on alignment/growth during solidification presents itself with a large degree of complexity.…”

Section: Introductionmentioning

confidence: 99%

EBSD Study on the Effect of a Strong Axial Magnetic Field on the Microstructure and Crystallography of Al-Ni Alloys During Solidification

Fautrelle

Gagnoud

et al. 2016

Metall Mater Trans A

Self Cite

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International audienceThe effect of a strong magnetic field on the microstructure and crystallography of the primary and eutectic Al3Ni phases in Al-Ni alloys was investigated by using EBSD. The results show that the magnetic field significantly affected the microstructures and crystallography during both volume and directional solidification. As a result, the Al3Ni primary phases were aligned with the < 001 > crystal direction along the magnetic field and formed a layer-like structure. The magnetic field intensity, solidification temperature, growth speed, and alloy composition played important roles during the alignment process of the Al3Ni primary phase. Indeed, the alignment degree increased with the magnetic field and the solidification temperature during normal solidification. Moreover, the effect of the magnetic field on the crystallography of the Al-Al3Ni eutectic in the Al-Ni alloys was also studied. The applied magnetic field modified the orientation of the preferred growth direction of the Al3Ni eutectic fiber and the crystallographic orientation relationship of the Al-Al3Ni eutectic. The orientation of the preferred growth direction of the Al3Ni eutectic fiber depended mainly on the solidification direction and the alignment of the Al3Ni primary phase. Furthermore, a method for controlling the crystallization process by adjusting the angle between the solidification direction and the magnetic field was proposed. (C) The Minerals, Metals & Materials Society and ASM International 201

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Effect of static magnetic field on microstructure and interdiffusion behavior of Fe/Fe–Si alloy diffusion couple

Cited by 13 publications

References 18 publications

Diffusion in Copper/Cobalt Systems under High Magnetic Fields

Diffusion in Copper/Cobalt Systems under High Magnetic Fields

Promoted diffusion mechanism of Fe2.7wt.%Si-Fe10wt.%Si couples under magnetic field by atomic-scale observations

EBSD Study on the Effect of a Strong Axial Magnetic Field on the Microstructure and Crystallography of Al-Ni Alloys During Solidification

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