Structural Feature and Solute Trapping of Rapidly Grown Ni3Sn Intermetallic Compound |
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| Authors: | QIN Hai-Yan WANG Wei-Li WEI Bing-Bo |
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| Affiliation: | Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710072 |
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| Abstract: | The rapid dendritic growth of primary Ni3Sn phase in undercooled Ni-30.9%Sn-5%Ge alloy is investigated by using the glass fluxing technique. The dendritic growth velocity of Ni3Sn compound is measured as a function of undercooling, and a velocity of 2.47m/s is achieved at the maximum undercooling of 251K (0.17TL). The addition of the Ge element reduces its growth velocity as compared with the binary Ni75Sn25 alloy. During rapid solidification, the Ni3Sn compound behaves like a normal solid solution and it displays a morphological transition of ``coarse dendrite-equiaxed grain-vermicular structure' with the increase of undercooling. Significant solute trapping of Ge atoms occurs in the whole undercooling range. |
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| Keywords: | 81 10 Fq 81 10 Mx 81 30 Fb |
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