Orientation-dependent equilibrium film thickness at interphase boundaries in ceramic-ceramic composites

Abstract

Theoretical considerations of the Hamaker constant for the interaction of two media across a third suggest that the highly anisotropic nature of the refractive indices of a medium such as h-BN will produce an orientation dependence on equilibrium film thickness through their effect on the dominant dispersion energy term in the Hamaker constant. High resolution transmission electron microscope observations of h-BN - 3C SiC interphase boundaries confirm the expected trend in orientation dependence on equilibrium film thickness.