What characterizes a substitutional solid solution?

A substitutional solid solution is characterized by the phenomenon where atoms of one metal in a crystalline lattice are replaced by atoms of another metal. This exchange occurs when the alloying metal has a similar atomic size and crystal structure to the parent metal. This similarity allows for the orderly substitution of atoms while maintaining the overall integrity of the crystal lattice.

In this context, the arrangement of atoms in the alloy still respects the geometric symmetry and bonding configurations, which is essential for the stability of the resulting solid solution. This behavior can significantly influence the physical and mechanical properties of the alloy, such as strength, ductility, and conductivity, making substitutional solid solutions essential in various engineering applications.