Local Chemistry at Interfaces and Boundaries: Ceramic and Electronic Composite Materials

Fibrous Ceramic-ceramic Composite Materials Processing and Properties

Mobility control of ceramic grain boundaries and interfaces

Grain boundary mobility and grain-liquid boundary mobility in ceramics vary vastly from material to material. Their characteristics are sensitive to the crystal structure, the nature of bonding, orientation, stoichiometry and composition. More directly, mobility can be lowered by decreasing the interfacial energy and anisotropy or increasing solute drag, liquid viscosity, particle pinning and g...

Electronic materials theory: Interfaces and defects

An overview of developments in materials theory is presented, with an emphasis on first-principles calculations. Examples are given from the fields of heterojunction interfaces and point defects in semiconductors. Predictive theories of materials are shown to be increasingly important for understanding but also designing materials and structures. © 2003 American Vacuum Society. @DOI: 10.1116/1....

Intergranular films at metal–ceramic interfaces Part I – interface structure and chemistry

In this work the structure and chemistry of intergranular films at metal–ceramic interfaces was investigated via detailed microstructural characterization of model metal–Al2O3 nanocomposites. We report here experimental results indicating the formation and stability of equilibrium nanometer-thick films at metal–ceramic interfaces. Thin 1 nm interface films were observed for two different metal–...

Chemical Precipitation of BaCeO3 – CeO2 Based Nano-ceramic Composite Oxide Materials and Their Physical Characterization

In order to reduce the operating temperature of solid oxide fuel cells (SOFCs), novel electrolyte materials based on CeO2 and BaCeO3 are being developed in the scientific realm. In this context, we propose a new methodology for preparing the nano-ceramic composite materials such as BaCe0.9Gd0.9O3-δ – Ce0.9Gd0.9O2-δ (BCGO–CGO) and BaCe0.8Sm0.2O3-δ – Ce0.8Sm0.2O2-δ (BCSO – CSO) as possible elec...