Question

What are interstitial compounds? Give the classification of alloys with examples.

Hint:

When studying alloys, note that substitutional alloys have atoms that replace the host metal atoms, while interstitial alloys have smaller atoms that fit into the interstitial spaces of the metal lattice.

Answer 1

Step 1: Interstitial Compounds.
Interstitial compounds are compounds formed when small atoms such as hydrogen, carbon, or nitrogen occupy the interstitial spaces between the larger metal atoms in a metal lattice. These compounds are typically hard and have high melting points, as the smaller atoms create strain in the lattice. Step 2: Classification of Alloys.
Alloys can be classified into two main categories: - Substitutional alloys: The atoms of the alloying element replace the metal atoms in the host structure. Example: Brass (Cu-Zn alloy). - Interstitial alloys: The atoms of the alloying element occupy the interstitial spaces between the metal atoms. Example: Steel (Fe-C alloy).