Which term describes a compound of metals formed by smaller atoms occupying interstitial spaces?

The term that describes a compound of metals formed by smaller atoms occupying interstitial spaces is interstitial compounds. In metallurgy, interstitial compounds are formed when smaller non-metallic or metallic atoms fit into the spaces (interstices) between larger metal atoms in a crystal lattice structure.

This arrangement alters the properties of the metal, enhancing characteristics such as strength, hardness, and resistance to corrosion. Common examples of interstitial compounds include carbides (like tungsten carbide) and nitrides, where carbon or nitrogen atoms occupy the interstitial sites in a metallic host.

Understanding this concept is crucial for applications in engineering and material science, as it allows for the design of materials with specific properties tailored for various uses, such as cutting tools or structural components.