三元至五元混合物中旋节线分解与润湿的相互作用
Interplay between spinodal decomposition and wetting in ternary to quinary mixtures
- Indian Institute of Technology Roorkee（印度理工学院鲁尔基分校）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本研究通过二维相场模拟，探究了三至五元混合物中旋节线分解与润湿的相互作用，揭示了颗粒-组分相互作用如何调控微观结构演化，为多组分材料设计提供指导。
AI中文摘要：
我们基于Cahn-Hilliard描述，使用二维相场模拟来研究N=3、4、5组分混合物中的旋节线分解。特别地，我们考虑了表面定向旋节线分解，其中一种共存相作为填料颗粒，而其余组分在其周围发生相分离。我们通过改变颗粒与其他组分之间的界面张力来研究非润湿和润湿条件。润湿动力学与旋节线分解之间的竞争产生了丰富的形态演化，包括形成晶格、液滴和靶（或核-壳）形态。靶图案由颗粒周围交替的富组分环组成。在中间到后期时间范围内，这些结构经历由曲率诱导的润湿层耗尽和随后周围畴粗化驱动的进一步形态转变，导致靶图案破裂成基体组分的孤立畴。我们发现，随着组分数的增加，畴粗化系统地减慢，而润湿在所有情况下都加速了粗化。所得的形态和相分离路径展示了颗粒-组分相互作用如何用于控制多组分混合物中的微观结构演化，对从工业材料到细胞生物学的系统具有潜在意义。
英文摘要：
We use two-dimensional phase-field simulations based on the Cahn--Hilliard description to study spinodal decomposition in N-component mixtures with N = 3, 4, 5. In particular, we consider surface-directed spinodal decomposition in which one of the coexisting phases serves as a filler particle, while the remaining components phase separate around its surface. We investigate both nonwetting and wetting conditions by varying the interfacial tensions between the particle and the other components. The competition between wetting kinetics and spinodal decomposition produces rich morphological evolution, including the formation of lattice, droplet, and target (or core-shell) morphologies. The target pattern consists of alternating component-rich rings around the particle. In the intermediate-to-late time regime, these structures undergo further morphological transitions driven by curvature-induced depletion of wetting layers and subsequent coarsening of the surrounding domains, resulting in the breakup of target patterns into isolated domains of the matrix components. We find that domain coarsening slows down systematically as the number of components increases, while wetting accelerates it in all cases. The resulting morphologies and phase-separation pathways demonstrate how particle--component interactions can be used to control microstructural evolution in multicomponent mixtures, with potential implications for systems ranging from industrial materials to cellular biology.
