INVESTIGATION OF RAPID DIRECTIONAL SOLIDIFICATION OF AL-BASED IMMISCIBLE ALLOYSⅠ. EFFECT OF APPLIED MAGNETIC FIELD

Acta Metall Sin

2007, Vol. 43

Issue (6): 567-572 DOI:

Research Articles

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INVESTIGATION OF RAPID DIRECTIONAL SOLIDIFICATION OF AL-BASED IMMISCIBLE ALLOYSⅠ. EFFECT OF APPLIED MAGNETIC FIELD

Jie He;;;;;

金属研究所

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Jie He. INVESTIGATION OF RAPID DIRECTIONAL SOLIDIFICATION OF AL-BASED IMMISCIBLE ALLOYSⅠ. EFFECT OF APPLIED MAGNETIC FIELD. Acta Metall Sin, 2007, 43(6): 567-572 .

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Abstract The directional solidification experiment of Al-Bi immiscible alloys has been carried out by using the self-made equipment with the applied magnetic field. The effect of the magnetic field strength on the microstructure was investigated. Also, the effects of the magnetic field on the sphere’s nucleation, spatial motion and the collision and coagulation between spheres have been analyzed theoretically. The results show that both the motion velocity and the probability of the collision and coagulation are availably reduced due to the applied magnetic field. It indicates that the larger the magnetic field strength, the smaller the average size of Bi-rich spheres is and the more dispersedly the spheres distribute.

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Received: 09 November 2006

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