Nitrides are chemical compounds that consist of nitrogen and another element, typically a metal. They are formed when nitrogen atoms bond with elements like aluminum, titanium, or gallium. Nitrides are known for their hardness and thermal stability, making them useful in various applications, including electronics and cutting tools. These compounds can exhibit different properties depending on their composition and structure. For example, silicon nitride is used in high-performance ceramics, while boron nitride is known for its lubricating properties. Overall, nitrides play a significant role in materials science and engineering.