Al-Ni二元系的δ相理想成分为Ni_2Al_3,其室温的均匀范围为38.50—42.19 at.％Ni,单胞体积随Ni含量而变化,在理想成分为最小值。 Al-Ni二元系的β相理想成分为NiAl,其室温的均匀区在45.25—60.1 at·％Ni,它是由二个相互嵌入的简单立方点阵所组成,β相单胞体积随at.％Ni成分变化而变化,在50at.％ Ni处有一最大值。 本工作用正电子湮没技术研究Al-Ni二元系中δ和β相固溶体的类型。 The δ-phase ideal composition of Al-Ni binary system is Ni_2Al_3, and the average range of room temperature is 38.50-42.19 at% Ni. The unit cell volume varies with Ni content, and the ideal composition is the minimum value. The β-phase ideal component of Al-Ni binary system is NiAl. The homogeneous region at room temperature is 45.25-60.1 at ·% Ni. It consists of two simple cubic lattice embedded in each other. .% Ni composition changes, with a maximum at 50at.% Ni. In this work, positron annihilation technique was used to study the types of δ and β solid solution in Al-Ni binary system.