Analysis of interfacial reactions between Sn-37Pb and Ni by phase diagram calculation method

Through Thermo-Calc software and the related database,phase diagrams were calculated to analyze the interfacial reactions between Sn-Pb eutectic alloy and Ni matrix.By calculating metastable equilibrium between liquid Sn-37Pb and Ni according to the local equlibria theory,the compounds forming sequence has been predicted,which is Ni₃Sn₄→Ni₃Sn₂→Ni₃Sn.By calculating the isothermal section at 500 K and 423 K respectively,the information of the phase transformation during wetting and aging reaction has been obtained.All above agrees with the previous experimental results well.