INVESTIGATION OF RAPID DIRECTIONAL SOLIDIFICATION OF AL-BASED IMMISCIBLE ALLOYS Ⅱ. EFFECT OF THE THIRD ELEMENT

Acta Metall Sin

2007, Vol. 43

Issue (6): 573-577 DOI:

Research Articles

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INVESTIGATION OF RAPID DIRECTIONAL SOLIDIFICATION OF AL-BASED IMMISCIBLE ALLOYS Ⅱ. EFFECT OF THE THIRD ELEMENT

Jie He;;;;;

金属研究所

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Jie He. INVESTIGATION OF RAPID DIRECTIONAL SOLIDIFICATION OF AL-BASED IMMISCIBLE ALLOYS Ⅱ. EFFECT OF THE THIRD ELEMENT. Acta Metall Sin, 2007, 43(6): 573-577 .

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Abstract The directional solidification experiment has been carried out for the Al-Bi based immiscible alloys. The effect of the addition element Si or Cu and the content on the solidification microstructure was investigated. The results show that both Si and Cu accelerate the coarsening of the Bi-rich sphere, and the addition of Si is more obvious than the element Cu to do under the same experimental condition. The change of the free energy, liquid-liquid interfacial energy and liquid viscosity due to the addition has been analyzed. Also, the effect of the change on the solidification process was discussed in detail. This investigation will enrich the understanding of the solidification feature of the ternary immiscible alloys.

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Received: 09 November 2006

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