在固液混合相区物质剪切模量的讨论

Discussion on Shear Modulus of Materials at Solid-Liquid Phase Region

从实验和理论两个方面对处于固液相变平衡条件下物质在固液混合相区的剪切模量进行了讨论,认为物质的剪切模量在开始熔化时并不等于零。采用逾渗理论对物质在固液混合相区的固相连通性进行了计算,得到物质整体剪切模量消失的临界熔化质量分数为0.687左右。所给出的物质的熔化失稳因子F(p)能够定性的描述处于固液相变平衡条件下物质固液混合相区内相关物理参量的变化。

From theoretical and experimental aspects, the shear modulus of material at the solid-liquid phase region was discussed when the material has attained its phase transition equilibrium and conclu- ded that the shear modulus did not equal to zero as soon as the material began to melt. Using percolation theory,the connectivity of solid phase in solid-liquid phase region was calculated and the critical melting mass fraction is 0. 687 when the shear modulus of material equal to zero. The melting unstable factor of material, presented by us, can represent qualitatively the change of correlative physical parameters in melting process.