Eutectic product in Fe-C system is called Ledeburite.

Ledeburite is a eutectic mixture of austenite and cementite formed in the Fe-C system. It is a two-phase structure formed at a eutectic composition of 4.3% carbon and 1400°C. The structure consists of alternating layers of austenite and cementite that form a lamellar pattern.

Formation of Ledeburite:

When the Fe-C alloy is heated to a temperature above its eutectic point, the liquid phase begins to solidify. The first solid to form is primarily austenite, which has a carbon content of 2.11%. As cooling continues, the austenite becomes richer in carbon and eventually reaches the eutectic composition of 4.3% carbon. At this point, the remaining liquid solidifies into a mixture of austenite and cementite, known as ledeburite.

Properties of Ledeburite:

- It is a two-phase structure consisting of alternating layers of austenite and cementite.
- It has a lamellar pattern.
- It is brittle and has poor mechanical properties.
- It is not useful for most engineering applications.

Applications of Ledeburite:

Ledeburite is not useful for most engineering applications due to its poor mechanical properties. However, it is an important structure in the study of iron-carbon alloys and is used to understand the formation of other microstructures such as pearlite, bainite, and martensite.