|About this Abstract
||Materials Science & Technology 2009
||Characterization and Modeling of Ceramic-Ceramic and Metal-Ceramic Interfaces
||Role of Anisotropic Interfacial Energy on Interface Populations in Metal-Ceramic Systems – A Monte Carlo Study
||Debashis Kar, Anthony D Rollett, Gregory S Rohrer
|On-Site Speaker (Planned)
In metal-ceramic systems, the metallic binder preferentially wets some ceramic interfaces, and the metal-ceramic interfaces are faceted, indicating significant anisotropy in homophase and heterophase interface energy. A two-dimensional Monte Carlo model is used to study the effect of anisotropic interface energy on interface populations. Grain boundaries and heterophase interfaces can be parameterized in a five-dimensional space, based on misorientation and boundary inclination. The main difference between homophase and heterophase interfaces is that switching symmetry only applies to grain boundaries - so the orientation space needed for heterophase interfaces is twice that of homophase interfaces. The interface energy is defined as an anisotropic function dependent on boundary inclination alone. Methods to determine interface inclinations in digital microstructures, using either a centre of mass approach or a dual-grid approach are discussed. Evolving from an initial random distribution of interfaces, the interface character distribution is correlated to anisotropic interface energy.