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根据热力学活度理论得出的在气体蒸发法中合金超细微粒与母材的组份关系对Ｆｅ－Ｓｉ和Ｆｅ－Ｐｄ两个典型的实验结果进行了分析．理论和实验表明，在一定的加热温度和气体压强下，二元超细微粒与母材的组份关系不但与各元素的饱和蒸气压有关，而且还与母材处于蒸发前的熔体状态时的活度系数有关．在非等浓度蒸发时，超细微粒的组份还与熔体的偏析性质及蒸发过程有关．
Based on the theory of thermodynamic activity, the relationship between the composition of the ultrafine particles and the base metal in the gas evaporation method was analyzed. The results of two typical experiments were analyzed. Theoretical and experimental results show that under a certain heating temperature and gas pressure, the relationship between the binary ultrafine particles and the base metal is not only related to the saturated vapor pressure of each element, but also to the melt state before the base metal is evaporated The activity coefficient. In non-equal concentration evaporation, the composition of the ultrafine particles is also related to the segregation of the melt and the evaporation process.