발간논문

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Vol.38, No.4, 523 ~ 529, 2000
Title
Pesearch Paper / Solidification : Effect of Enhanced Gravity on the Microstructure of Unidirectionally Solidified Bi-Mn Eutectic Alloy
황창모Chang Mo Hwang,양영기Young Ki Yang,이경환Kyong Whoan Lee,강춘식Choon Sik Kang
Abstract
The microstructure of eutectic MnBi/Bi alloy was investigated after unidirectional solidification under centrifuge process in Bridgman-Stockbarger furnace. Microstructure of the crystals with growth velocity 100 ㎜/h, 25 ㎜/h showed cellular structure and evenly dispersed second phase morphology of MnBi intermetallic compound. The second phase MnBi rod size was varied with acceleration in all growth condition. Numerical analysis was produced to expect fluid flow in rotating system using flow 3d. According to numerical analysis, the fluid flow increased with centrifugal acceleration under constant temperature condition and abrupt increase was expected near centrifugal force is 5G (G = 9.8 ｍ/s: territorial acceleration).
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