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基于金属的固-液相变机制和液态金属的微观不均匀理论,建立了熔化潜热、汽化潜热与熔点处金属熔体中的剩余键数、近程有序原子数之间的物理模型,并给出了该模型的数学推导和证明.该模型只需要晶体结构的基本参数及热物性数据就可以得到金属固-液相变后原子集团内的剩余键数和所包含的近程有序原子数,为进一步认识熔体结构信息提供了有效的途径.利用所建立模型计算了铝、镍熔体的剩余键数和近程有序原子数,计算结果与试验值吻合较好.同时,讨论了原子序数对第I、第II主族元素熔体的剩余键数和近程有序原子数的影响.
Based on the solid-liquid phase transition mechanism of metal and the microscopic nonuniformity theory of liquid metal, the latent heat of fusion, the latent heat of vaporization and the physical bond between the number of remaining bonds in the metal melt at the melting point and the number of atoms in the shortest order are established. The mathematical derivation and proof of this model are given.The model only needs the basic parameters and thermophysical properties of the crystal structure to get the number of remaining bonds in the atomic group after the metal solid-liquid phase transition and the number of the nearest-neighbor ordered atoms Which provides an effective way to further understand the structure information of molten structure.According to the established model, the remaining bond number and the number of near-order ordered atoms of aluminum and nickel melt are calculated, and the calculated results are in good agreement with the experimental values. The effect of atomic number on the remaining bond number and the number of short-range ordered atoms in the first and second main groups of elements melt.