Solute diffusion controlled dendritic growth under high undercooling conditions

Chong De Cao, Xiao Yu Lu, Bing Bo Wei

科研成果: 期刊稿件文章同行评审

8 引用 (Scopus)

摘要

Liquid Cu70 Co30 alloy is undercooled up to 363K (0.22TL) by using glass-fluxing technique. The LKT/BCT dendritic growth theory is modified and made applicable to predict the kinetic characteristics of dendritic growth in those alloy systems which have extremely curved liquidus and solidus lines. Actual calculations reveal that the dendritic growth of primary α-Co phase in Cu70 Co30 alloy is constantly controlled by solute diffusion. The growth velocity of α-Co dendrite has a maximum value of 54.5 mm/sat an undercooling of 333 K. The calculated solubility of Cu in α-Co dendrite decreases with the increase of undercooling, which agrees well with the experimental data. Prior to peritectic transformation, the growth of α-Co dendrite is close to equilibrium solidification.

源语言英语
页(从-至)840-842
页数3
期刊Chinese Physics Letters
15
11
DOI
出版状态已出版 - 1998

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