Study on the Mechanism and Influencing Factors of Rotational Orientation of Crystals in Melt Under a High Magnetic Field

doi:10. 3969/ j. issn. 1000-1093. 2013. 07. 010

Abstract

Abstract: The rotating mechanism of second phase particles in melt under the action of high static magnetic fields is analyzed, and the thermodynamic criterion and the law of rotational motion are given. Some important factors, such as temperature, gravity and particle shape, which play key role in the rotation of the second phase are clarified in detail. The results of theoretical analysis and experiments show that the rotational movement of the second phase is attributed to the resultant movement, the critical sizes of the second phase particles depend on temperature and gravity, and the shapes of the second phase particles have an effect on the orienting time. It can be concluded the high oriented metal-matrix composite can be fabricated under the action of an appropriate high static magnetic field by altering the factor mentioned above based on the differnce of intrinsic magnetic susceptibility of matters.

Key words: metallic materials, high magnetic field, melt, the second phase, magnetic orientation, solidified structure

CLC Number:

TG111. 3

LOU Chang-sheng, WANG Qiang, WANG Chun-jiang, YUAN Yi, LI Wen, HE Ji-cheng. Study on the Mechanism and Influencing Factors of Rotational Orientation of Crystals in Melt Under a High Magnetic Field[J]. Acta Armamentarii, 2013, 34(7): 858-864.

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