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参考Miedema半经验理论，建立了Fe-Ni系机械合金化（MA）过程的热力学模型．热力学计算分析指出，Fe-Ni系粉末MA过程一般不存在发生非晶化反应的化学驱动力．Fe-Ni系MA粉末由α（bcc）和γ（fcc）两相固溶体组成．在球磨过程中两相相互转化，控制这一转化的因素是形成焓的结构项．对不同球磨时间Fe60Ni40MA粉末的X射线衍射（XRD）分析，证明了所建立的热力学模型的正确性．根据XRD图确定了Fe60Ni40MA粉末在不同球磨时间的物相组成、各相成分、晶格参数、晶粒尺寸和晶格畸变等结构参数．
With reference to Miedema semi-empirical theory, a thermodynamic model of Fe-Ni based mechanical alloying (MA) process was established. Thermodynamic calculations indicate that there is generally no chemical driving force for the amorphization reaction in the MA process of Fe-Ni powder. The Fe-Ni-based MA powder consists of a two-phase solid solution of α (bcc) and γ (fcc). In the milling process, the two phases transform into each other and the factors that control this transformation are the structural elements that form the enthalpy. The X-ray diffraction (XRD) analysis of Fe60Ni40MA powder with different ball milling time proves the correctness of the established thermodynamic model. According to the XRD pattern, the phase composition, phase composition, lattice parameter, grain size and lattice distortion of Fe60Ni40MA powder during different milling time were determined.