Multicomponent nucleation: thermodynamically consistent description of the nucleation work.
Multicomponent nucleation: thermodynamically consistent description of the nucleation work.
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多组分成核：成核工作的热力学一致描述。
DOI：
10.1063/1.1643711
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发表时间：
2004
期刊：
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通讯作者：
D. Kashchiev
中科院分区：
文献类型：
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作者：
D. Kashchiev
推导了多组分均相成核中的成核功的热力学一致公式。该推导依赖于保守的分界面，该分界面将核定义为具有等于共存时宏观上大的新旧相之间界面的比表面能 sigma0 的比表面能。给出了由保守分割面和张力面定义的核半径的表达式。作为一个附带结果，还确定了由张力表面定义的核的表面张力 sigmaT 的曲率依赖性。该分析对于任何尺寸的核都有效，即对于亚稳旧相的双节线和旋节线之间的整个条件范围内的成核，只要满足不等式 sigmaT < 或 = sigma0 即可。发现在分析有效的条件下，成核率高于经典成核理论给出的成核率。一般结果适用于二元气体、液体或固体混合物中一元液体或固体的成核。
A thermodynamically consistent formula is derived for the nucleation work in multicomponent homogeneous nucleation. The derivation relies on the conservative dividing surface which defines the nucleus as having specific surface energy equal to the specific surface energy sigma0 of the interface between the macroscopically large new and old phases at coexistence. Expressions are given for the radius of the nucleus defined by the conservative dividing surface and by the surface of tension. As a side result, the curvature dependence of the surface tension sigmaT of the nucleus defined by the surface of tension is also determined. The analysis is valid for nuclei of any size, i.e., for nucleation in the whole range of conditions between the binodal and the spinodal of the metastable old phase provided the inequality sigmaT < or = sigma0 is satisfied. It is found that under the conditions of validity of the analysis the nucleation rate is higher than the nucleation rate given by the classical nucleation theory. The general results are applied to nucleation of unary liquids or solids in binary gaseous, liquid or solid mixtures.
K.Nishioka：“多组分系统中蒸气液相成核的热力学公式”J.Chem.Phys。
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K.Nishioka：“评估形成临界核的可逆功的热力学公式以及临界核尺寸对界面张力的影响”Metall.Trans.A。
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