The undercooling ability of Sb and Sb-Bi alloys was measured by DSC

and the exotherm is increased with the increase of Sb content.Through the resistivity measurement

it is found that the resistivity of Sb and Sb-Bi alloys undergoes several sudden change

and the upturn of resistivity of Sb and Sb90Bi10 at undercooled state can be observed with the decrease of temperature.Meanwhile

the abrupt transformation of resistivity corresponds to the sudden change of temperature during the cooling process in Sb and Sb-Bi alloys.It is believed that the difference of exotherm is attributed to the difference of latent heat release ability

and the sudden change of resistivity with temperature is related to the peierls distortion in hexahedral structure of Sb and the change of atomic cluster size.In addition

the corresponding relation of temperature and resistivity indicates that the structure transition in solidification process has the obvious effect on the resistivity.