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采用 ＣＡＬＰＨＡＤ技术评估了Ｎｉ－Ｇａ二元系的相图和热力学性质．用双亚晶格模型描 述２个有序相（Ｌ１２－Ｎｉ３Ｇａ和Ｂ２－ＮｉＧａ）的热力学行为，并在优化过程中考虑了ｆｃｃ－（Ｎｉ）和Ｌ１２Ｎｉ３Ｇａ 相的有序－无序转变．溶液相（液相、ｆｃｃ－（Ｎｉ）固溶体）的热力学模型采用Ｒｅｄｌｉｃｈ－Ｋｉｓｔｅｒ方程，其 余５个中间化合物被视为整比化合物．
CALPHAD technique was used to evaluate the phase diagram and thermodynamic properties of Ni-Ga binary system. The thermodynamic behavior of two ordered phases (L12-Ni3Ga and B2-NiGa) was described by a two-sublattice lattice model, and the order-disorder transition of fcc- (Ni) and L12Ni3Ga phases was taken into account in the optimization process. The thermodynamic model of the solution phase (liquid phase, fcc- (Ni) solid solution) uses the Redlich-Kister equation and the remaining five intermediate compounds are considered as ortho-compounds.