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Growth temperatures in Al-CuAl2 and Sn-Cd eutectic alloys

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Abstract

Measurements of the interface undercooling-growth velocity relationship for Al-CuAl2 eutectic alloys solidified horizontally and for Sn-Cd eutectic alloys solidified horizontally and vertically are presented. All the measurements confirm the relationship ΔT =Kv 1/2. The value ofK for Al-CuAl2 alloys is 12.8°C cm-1/2 s1/2 and 13.3°C cm-1/2 s1/2 for Sn-Cd alloys for both modes of solidification. These values are much greater than those measured by Moore and Elliott. Reasons for the discrepancy are discussed. TheK value for Al-CuAl2 alloys is only slightly greater than a recent measurement by Tassa and Hunt. The present measurements fit the extremum condition of the Hunt and Jackson theory of eutectic growth.

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Authors and Affiliations

  1. Faculty of Science, University of Manchester, MI7HS, Manchester, England

    S. M. D. Borland (Research Student in the Metallurgy Department, U.M.I.S.T.) & R. Elliott (Lecturer in Metallurgy Department)

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  1. S. M. D. Borland
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  2. R. Elliott
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Borland, S.M.D., Elliott, R. Growth temperatures in Al-CuAl2 and Sn-Cd eutectic alloys. Metall Trans A 9, 1063–1067 (1978). https://doi.org/10.1007/BF02652210

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