Nucleation that takes place at the grain boundaries are known as___________

Nucleation that takes place at the grain boundaries are known as___________ Correct Answer Heterogeneous nucleation

Heterogeneous Nucleation occurs at preferential sites such as grain boundaries, dislocations or impurities. They rather prefer the surface than the bulk of the material unlike the homogenous nucleation.
Bissoy MCQ

Related Questions

At very small driving forces, when activation energy barriers for nucleation are high, the highest nucleation rates will be produced by grain corner nucleation.
The grain boundary is made of a regular array of edge dislocation at define spacing. In the case of low angle grain boundary, the distance between dislocation array will be small, and for high angle grain boundaries, it will be large.
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1. When evaporation takes place, cooling takes place.
2. Evaporation takes place at all temperature, boiling takes place only at the boiling point.
3. Evaporation is a surface phenomenon.
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Reason 'r': The addition of the alloying elements may result in the formation of deoxidation products or intermetallic compounds which may act as nucleation sites for grain refinement.
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