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(a) A unit cell of a -Sn crystal structure. (b) The extended crystal structure of -Sn. (c) Front view of the extended -Sn crystals. (d) The lattice structure of layer A in Fig. 1(c).
DFT results for the energy changes and geometries of a total metallic system before and after Sn atoms (-Sn, bct) are attached to the surface of Pb (fcc) or Zn (hcp). (a) , (b) , (c) , and (d) (Small ball: Sn atoms; large ball: Pb or Zn atoms. The plane of is the jagged surface; large balls with a light contrast mean a top surface.).
DSC results for undercooling of Sn-rich solders doped by various minor alloying elements with different crystal structures.
DSC results for undercooling of Sn-rich solders doped by various minor alloying elements with hcp crystals, namely, Mg, Ti, Sc, and Zr.
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