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建立了亚稳相合金的热力学模型,描述亚稳相的各种热力学物理量及其随成分、温度、晶粒尺寸等因素的变化.结合模型计算和系列实验,揭示了亚稳相的热力学性质、变化特征及其纳米尺度效应.以亚稳相SmCo_7合金为例,定量研究了亚稳相以单相形式稳定存在的条件及失稳发生的相分解行为.研究结果对亚稳相合金应用过程中相稳定性和相变的调控具有定量化指导意义.
The thermodynamic model of metastable phase alloy was established to describe the thermodynamic physical quantities of metastable phase and its variation with composition, temperature, grain size and other factors.According to the model calculation and series of experiments, the thermodynamic properties of metastable phase, The variation characteristics and the nanoscale effect of the metastable phase of SmCo_7 alloy as an example to quantitatively study the stability of the metastable phase in the form of single-phase form and instability of the phase decomposition behavior of the results of metastable phase alloy application process The regulation of phase stability and phase transition has the significance of quantitative guidance.