Qin Hai-Yan et al 2009 Chinese Phys. Lett. 26 118102 doi:10.1088/0256-307X/26/11/118102
Qin Hai-Yan, Wang Wei-Li and Wei Bing-Bo
Show affiliationsThe 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 2.47 m/s is achieved at the maximum undercooling of 251 K (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.
68.70.+w Whiskers and dendrites (growth, structure, and nonelectronic properties)
Issue 11 (November 2009)
Received 21 August 2009
Qin Hai-Yan et al 2009 Chinese Phys. Lett. 26 118102
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