Phasenverbindungen

Phasenverbindungen, also known as intermediate phases or intermetallic compounds, are solid phases that form between two or more metallic elements. These compounds possess distinct chemical compositions and crystal structures that differ from those of the constituent elements. Their formation is driven by a reduction in the overall free energy of the system. The bonding in these phases is typically a mixture of metallic and covalent characteristics, leading to unique physical and chemical properties.

The stoichiometry of phase compounds can be fixed or variable, depending on the specific elements involved and the phase diagram of the system. They often exhibit properties such as high hardness, brittleness, and high melting points, which can be advantageous in certain applications. For instance, they are found in alloys used for high-temperature applications, as catalysts, and in electronic components. The study of phase diagrams is crucial for understanding the existence, stability, and transformations of these compounds within alloy systems.