Alignment of weakly magnetic metals during solidification in a strong magnetic field

Sun, Zhi; Guo, Xiangming; Guo, Muxing; Zhang, Fei; Biest, Omer Van der; Blanpain, Bart

doi:10.1016/j.jallcom.2012.11.016

Cited by 19 publications

(7 citation statements)

References 34 publications

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“…For binary alloys, they have different magnetic materials such as paramagnetic alloys, ferromagnetic alloys and diamagnetic alloys. The orientation behavior of these alloys has been investigated extensively and experimentally [4][5][6][7][8]. However, researchers took few investigation on the binary alloys with different two kinds of diamagnetic elements, especially in immiscible alloy system.…”

Section: Introductionmentioning

confidence: 99%

Effects of high static magnetic field on crystal orientation and magnetic property of Bi-5wt.% Zn alloys

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Effects of high static magnetic field on crystal orientation and magnetic property of Bi-5wt.% Zn alloys

et al. 2015

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“…Applied magnetic fields have the ability to modify significantly the solidification process of alloys in regards to the grain size, crystal growth, and the solute or inclusion distribution12345678910. As is well-known, static magnetic fields are capable of damping flow and enhancing the growth of columnar dendrite1112.…”

mentioning

confidence: 99%

Formation mechanism of axial macrosegregation of primary phases induced by a static magnetic field during directional solidification

Xi¹,

Fautrelle²,

Ren³

et al. 2017

Sci Rep

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Understanding the macrosegregation formed by applying magnetic fields is of high commercial importance. This work investigates how static magnetic fields control the solute and primary phase distributions in four directionally solidified alloys (i.e., Al-Cu, Al-Si, Al-Ni and Zn-Cu alloys). Experimental results demonstrate that significant axial macrosegregation of the solute and primary phases (i.e., Al2Cu, Si, Al3Ni and Zn5Cu phases) occurs at the initial solidification stage of the samples. This finding is accompanied by two interface transitions in the mushy zone: quasi planar → sloping → quasi planar. The amplitude of the macrosegregation of the primary phases under the magnetic field is related to the magnetic field intensity, temperature gradient and growth speed. The corresponding numerical simulations present a unidirectional thermoelectric (TE) magnetic convection pattern in the mushy zone as a consequence of the interaction between the magnetic field and TE current. Furthermore, a model is proposed to explain the peculiar macrosegregation phenomenon by considering the effect of the forced TE magnetic convection on the solute distribution. The present study not only offers a new approach to control the solute distribution by applying a static magnetic field but also facilitates the understanding of crystal growth in the solute that is controlled by the static magnetic field during directional solidification.

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“…Several techniques have been explored to induce grain alignment and crystallographic texturing in ceramic materials, including platelet seeding for templated grain growth, sintering additive incorporation, hot pressing, casting (slip/tape/gel), and magnetic alignment, the last of which has not been widely researched [20][21][22][23][24][25][26][27][28][29][30][31]. Ceramics are often paramagnetic or diamagnetic, responding weakly to magnetic fields and requiring strong magnetic fields to produce desired effects [22-23, 25-26, 29].…”

Section: Methodsmentioning

confidence: 99%

Energy coupled to matter for magnetic alignment of rare earth–doped alumina

Brennan

Moorehead

Blair

et al. 2016

Materials and Manufacturing Processes

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Energy Coupled to Matter concepts such as magnetic field-assisted processing were used to align rare earth-doped alumina ceramics in the presence of applied fields. The addition of gadolinium and ytterbium dopants to alumina increased the magnetic susceptibility anisotropies, and induced magnetic torques that led to significant alignment of ceramic particles under the application of magnetic fields as low as 1.8 Tesla. In comparsion, undoped alumina materials showed minimal alignment under applied field strengths as high as 9 Tesla. Density function theory modeling indicated that the specific dopant typed dictated changes in the magnetic properties of different rare earth-doped alumina systems by directly affecting the magnetic moment localization and magnetocrystalline anisotropy.

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Alignment of weakly magnetic metals during solidification in a strong magnetic field

Cited by 19 publications

References 34 publications

Effects of high static magnetic field on crystal orientation and magnetic property of Bi-5wt.% Zn alloys

Effects of high static magnetic field on crystal orientation and magnetic property of Bi-5wt.% Zn alloys

Formation mechanism of axial macrosegregation of primary phases induced by a static magnetic field during directional solidification

Energy coupled to matter for magnetic alignment of rare earth–doped alumina

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