Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 287, Issue 2, Pages 146-152Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0921-5093(00)00767-X
Keywords
electromagnetic force; magnetic force; magnetic field; materials processing
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Apart from classical MHD effects on liquid metals such as braking of motions, stabilization of convection or shaping of free surfaces, the intense d.c. magnetic fields available from superconducting coils open the way to new phenomena which could lead to new methods in materials processing. Homogeneous magnetic field applied during solidification produce a texturation of the solid by magnetic orientation of crystallites present in the liquid. This effect is illustrated by examples of magnetic processing of high Tc superconductors, permanent magnets and biological materials. In the inhomogeneous parts of the held, a magnetic force develops related to the held gradient intensity and the material susceptibility. We present three specific applications developed recently in our research laboratory: levitation, thermomagnetic convection and phase separation. (C) 2000 Elsevier Science S.A. All rights reserved.
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