| Calculation of cooling rate of amorphous aluminum alloy melt-spun ribbons |
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| 作者姓名： | 何世文 刘咏 刘祖铭 黄伯云 |
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| 作者单位： | State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China |
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| 基金项目： | Project （2003AA302520） supported by the Hi-tech Research and Development Program of China |
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| 摘 要： |
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| 关 键 词： | 非晶态铝合金 带材 快速凝固 冷却速率 传热理论 |
| 收稿时间： | 2006-04-20 |
| 修稿时间： | 2006-06-30 |
Calculation of cooling rate of amorphous aluminum alloy melt-spun ribbons |
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| HE State Shi-wen , LIU Yong, LIU Zu-ming, HUANG Bai-yun.Calculation of cooling rate of amorphous aluminum alloy melt-spun ribbons[J].Transactions of Nonferrous Metals Society of China,2006,16(A02):140-143. |
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| Authors: | HE State Shi-wen LIU Yong LIU Zu-ming HUANG Bai-yun |
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| Abstract: | Based on the heat transfer theory and liquid solidification theory, the heat transfer during the rapid solidification process of amorphous ribbons prepared by melt spinning was approximately modeled by one-dimensional heat conduction equation. Besides, integration with the temperature gradient, the relationship between the ribbon thickness and solidification time was derived according to the boundary conditions of ribbon-copper wheel. A simply theoretical model was obtained to calculate the cooling rates of aluminum amorphous ribbons. According to the above theoretical model, the critical cooling rate of aluminum amorphous ribbons by melt spinning is above 10^6 K/s, which proves that the aluminum based alloys belong to the marginal glass forming ability of alloys. The calculated results are in good agreement with other estimated values reported previously. |
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| Keywords: | aluminum amorphous ribbon rapid solidification cooling rate melt spinning heat transfer |
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