Influence of high magnetic field on peritectic transformation during solidification of Bi–Mn alloy

Ren, Zhongming; Xi, Li; Sun, Yanhui; Gao, Yun; Deng, Kang; Zhong, Yunbo

doi:10.1016/j.calphad.2006.03.004

Cited by 21 publications

(17 citation statements)

References 19 publications

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“…Based on earlier researches, a shift of phase transformation and crystal morphologies induced by a strong magnetic field has been already realised [4]. The results now clearly indicate that, the nature of the precipitated phase can also be influenced by the magnetic field.…”

Section: Resultsmentioning

confidence: 62%

“…A lot of interesting phenomena have been observed and attracted considerable attention in the field of materials processing. Aspects that have been investigated include magnetic orientation [3], magneto-thermodynamics [4], magnetohydrodynamics [5] and magnetic effect on chemical reactions [6]. More particularly, the treatment of materials containing particles is a favoured topic.…”

Section: Introductionmentioning

confidence: 99%

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Strong Magnetic Field Induced Segregation and Self-Assembly of Micrometer Sized Non-Magnetic Particles

Sun¹,

Guo²,

Zhang³

et al. 2010

PIER B

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Abstract-Micrometer and sub-micrometer sized non-magnetic particles were manipulated by an external strong magnetic field (e.g., 10 Tesla) with a high gradient. During the strong magnetic field effects, segregation of the non-magnetic particles was observed which could not be realised only with gravitational field. Numerical calculations were subsequently carried out to understand the effects on the insulating particles in a conductive liquid matrix. The migration of micrometer sized particles is obviously enhanced by the magnetic field gradient. Combining the experimental results and theoretical analysis, particle-particle magnetic interaction was found to influence the overall segregation of the particles as well. Magnetised by the strong magnetic field, magnetic interaction between non-magnetic particles becomes dominant and a self-assembly behavior can be demonstrated. Various factors such as the magnetic dipole-dipole interaction and chainchain interaction, are governing the particles assembly. According to calculations, magnetic field should be strong enough, at least 7 T in order to obtain the assembly morphologies in the present case.

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Section: Resultsmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Strong Magnetic Field Induced Segregation and Self-Assembly of Micrometer Sized Non-Magnetic Particles

Sun¹,

Guo²,

Zhang³

et al. 2010

PIER B

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“…It means that, in a conductive fluid, the strong magnetic field effect depends on the particle size, indicating a counteracting behavior and controlling the particle assembly morphologies. This is one of the reasons why the agglomeration of large particles in conductive fluid can be limited and the particles repulse each other in a strong magnetic field and such phenomenon has been verified by recent experimental observations [7][8][9][10][11]. With the decrease of magnetic flux density, the magnitudes of the forces drop dramatically and become negligible compared with other forces, e.g., gravity force or convection [14].…”

Section: Effect Of the Magnetic Field Density On The Particle-particlmentioning

confidence: 72%

“…In a strong magnetic field of around 10 T, both magnetic and nonmagnetic particles, even in sub-micrometer size, in a conductive liquid can be aligned to a magnetically preferred orientation [11][12][13]. Their assembly morphologies reveal non-negligible interactions between the particles or the growing grains [12].…”

Section: Introductionmentioning

confidence: 99%

“…For interparticle magnetic forces, the magnetic dipole-dipole attractive force has been well understood and measured under different conditions both analytically and experimentally by means of ferromagnetic materials [18,19]. However, limited work has been carried out on the interparticle force due to a conductive melt flow [11,12]. Therefore, an analytical model was proposed in our previous work [14].…”

Section: Introductionmentioning

confidence: 99%

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Magnetic Interaction Between Two Non-Magnetic Particles Migrating in a Conductive Fluid Induced by a Strong Magnetic Field-an Analytical Approach

Sun¹,

Guo²,

Verhaeghe³

et al. 2010

PIER

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Abstract-An analytical approach is developed in the present paper to investigate the interaction between two non-magnetic particles migrating in a conductive fluid due to an imposed strong magnetic field (e.g., 10 Tesla). The interaction between the conductive fluid and a single particle migrating along the magnetic lines is influenced by the magnetic field and can be represented by an additional fluid viscosity. Thus the effective fluid viscosity is discussed and the magnetic field effect on the particle migrating velocity is examined. For two particles, two kinds of magnetic forces are induced: namely, the attractive force due to the magnetisation and the repulsive force caused by the conductive fluid flow around the non-magnetic particles. The forces are then evaluated with the consideration of the magnetic field effect on the particle migration and become significant with the increase of the magnetic flux density. The counteracting behavior with a critical particle size of the interparticle magnetic forces is discussed and compared with different magnetic field densities and gradient values.

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Progress in Research on Solidification in a Strong Static Magnetic Field

Ren

Deng

et al. 2007

steel research international

Self Cite

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Strong magnetic fields available from superconducting magnets are opening a way to new phenomena that could lead to new methods in materials processing including solidification. The principal research involving solidification in strong static magnetic fields is emphasizing four aspects: control of crystal orientation, convection damping, thermoelectric magnetohydrodynamics (TEMHD) and change in thermodynamics. Under high magnetic intensity, aligned structural textures are induced in both magnetic and non-magnetic materials. Since in strong magnetic field the melt flow is suppressed by convection damping, the microstructure being formed during solidification is affected heavily; this phenomenon applies to eutectic, monotectic and peritectic alloys as well as to dendritic morphologies typical of directional solidification. If strength and orientation of a magnetic field are controlled appropriately, this strong damping effect will generate more homogeneous crystals as a result of achieving diffusion-controlled solute transport conditions. TEMHD more easily occurs in strong magnetic fields, resulting in equiaxed crystals even under directional solidification. It is evidenced experimentally and theoretically that the thermodynamics of phase transformation and nucleation are changed by strong magnetic fields.

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Influence of high magnetic field on peritectic transformation during solidification of Bi–Mn alloy

Cited by 21 publications

References 19 publications

Strong Magnetic Field Induced Segregation and Self-Assembly of Micrometer Sized Non-Magnetic Particles

Strong Magnetic Field Induced Segregation and Self-Assembly of Micrometer Sized Non-Magnetic Particles

Magnetic Interaction Between Two Non-Magnetic Particles Migrating in a Conductive Fluid Induced by a Strong Magnetic Field-an Analytical Approach

Progress in Research on Solidification in a Strong Static Magnetic Field

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