Explain the terms solid solution, eutectic, eutectoid and peritectic.

Explain the terms solid solution, eutectic, eutectoid and peritectic.
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1 Answer

Answer :

Solid Solution. When a homogeneous mixture of two (or more) atomic forms exists in solid state, it is
known as solid solution.
Eutectic. A mixture of two (or more) phases which solidify simultaneously from the liquid al¬loy is called
an eutectic. Alloys in which the components solidify simultaneously at a constant tem¬perature the
lowest for the given system, are called eutectic alloys.
Eutectoid. Eutectoid alloys are the alloys for which two solid phases which are completely soluble
become completely insoluble on cooling before a certain temperature called eutectoid tem¬perature.
Peritectic. A peritectic transformation involves a reaction between a solid and liquid that form a
different and new solid phase. This three phase transformation occurs at a point called peritectic point.
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