Diffusion behaviour of Mg–Gd intermetallic compounds (IMCs) were studied in the temperature range of 713–793 K using the diffusion couple method. Measured growth constants and integral interdiffusion coefficients of formed IMCs showed inverse-correlation to melting temperatures, excluding metastable phase Mg₇Gd. Mechanical properties of obtained IMCs were studied using nanoindentation characterization technique and first-principles calculations. The experimental measured nano-hardness of Mg₅Gd, Mg₃Gd and Mg₂Gd are 4.11 GPa, 4.05 GPa and 4.72 GPa, respectively, nearly twice of that of α (Mg). The obtained kinetic and mechanical information of Mg–Gd system is the basis for the development of high-strength Mg–Gd based Mg alloys.

Mg-Gd金属间化合物（IMCs）在713-793 K的温度范围内的扩散行为采用了扩散偶合方法进行了研究。测得的形成的IMC的生长常数和积分互扩散系数与熔融温度呈反相关关系，不包括亚稳相Mg ₇ Gd。使用纳米压痕表征技术和第一性原理计算研究了获得的IMC的机械性能。实验测得的Mg ₅ Gd，Mg ₃ Gd和Mg ₂ Gd纳米硬度分别为4.11 GPa，4.05 GPa和4.72 GPa，几乎是α（Mg）的两倍。所获得的Mg-Gd系统的动力学和力学信息是开发高强度Mg-Gd基Mg合金的基础。