Abstract
Interfaces are known to be crucial in a variety of fields and the interfacial volume fraction dramatically affects physical properties of composite media. However, it is an open problem with great significance how to determine the interfacial property in composite media with inclusions of complex geometry. By the stereological theory and the nearest-surface distribution functions, we first propose a theoretical framework to symmetrically present the interfacial volume fraction. In order to verify the interesting generalization, we simulate three-phase composite media by employing hard-core-soft-shell structures composed of hard mono-/polydisperse non-spherical particles, soft interfaces, and matrix. We numerically derive the interfacial volume fraction by a Monte Carlo integration scheme. With the theoretical and numerical results, we find that the interfacial volume fraction is strongly dependent on the so-called geometric size factor and sphericity characterizing the geometric shape in spite of anisotropic particle types. As a significant interfacial property, the present theoretical contribution can be further drawn into predicting the effective transport properties of composite materials.
Highlights
Interfaces are known to be crucial in a variety of fields and the interfacial volume fraction dramatically affects physical properties of composite media
Materials are normally viewed as a three-phase composite consisting of mono-/polydisperse hard particles of anisotropic geometry, interfacial layers with a predefined dimension coating around hard particles, and matrix, which is known as the hard-core-soft-shell (HCSS) structure[3,4,5,6,7,8]
In the above previous studies, the interfacial volume fraction around anisotropic particles is typically investigated on a case-by-case basis using computer simulations or approximate schemes, even though these predominant lines of research are of significance for understanding the interfacial volume fraction, there is yet no a theoretical framework to systematically estimate the interfacial volume fraction so far
Summary
Interfaces are known to be crucial in a variety of fields and the interfacial volume fraction dramatically affects physical properties of composite media.
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