The stability of interfaces in high-temperature metal-matrix composites

The interface between the matrix and the reinforcement is an area of great importance in the design of viable high-temperature metal-matrix composites (MMCs). Thorough understanding of the phenomena taking place at the interface is necessary to ensure reliable performance, but the thermodynamic data that would help to predict interfacial reactions are lacking for many systems. However, given certain knowledge, interfaces can be classified according to their stability, providing a tool for composites designers and an impetus for further fundamental work. This article describes the classification system and provides examples of interfacial behavior in a titanium-based material.