C12 N4

C₁₂N₄ is a theoretical carbon nitride compound belonging to the family of hard, superhard ceramic materials synthesized through high-pressure or chemical vapor deposition routes. This material remains largely in the research phase, with potential applications in extreme-wear and high-temperature environments where it would compete with established superhard coatings like diamond and cubic boron nitride (cBN). Engineers consider carbon nitrides primarily for their potential to combine hardness, thermal stability, and chemical inertness in applications where conventional carbides or nitrides reach performance limits.