Cementite also forms when a mixture of iron and graphite heated under a pressure of less than 5 GPa at about 1000°C, (Figure) (Tsuzuki:1984).

What phase is cementite?

Cementite, a carbide phase of high hardness, has a more complicated orthorhombic crystal unit cell, with a ratio of three iron atoms to one carbon atom [4].

What is cementite process?

A hard and brittle compound formed by the reaction of iron with carbon, having the formula Fe3C. A major constituent of pearlite, it is also known as iron carbide. Cementite was named after the early steel-making process of cementation, which increased the carbon content of iron to make it into steel.