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HomeHomework Helpmaterials-scienceDefects in Crystal Lattices

Defects in Crystal Lattices

Variations in the regular arrangement of atoms in crystals affecting their properties.

intermediate
2 hours
Materials Science
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Overview

Defects in crystal lattices are crucial for understanding the properties and behaviors of materials. They can be classified into point defects, line defects, and surface defects, each affecting the material's characteristics in unique ways. For instance, point defects like vacancies can enhance diff...

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Key Terms

Point Defect
A defect that occurs at a single point in the crystal lattice, such as a vacancy or interstitial.

Example: A vacancy is a point defect where an atom is missing from its lattice site.

Line Defect
A defect that extends in one dimension, such as a dislocation.

Example: Edge dislocations are line defects that can affect the strength of materials.

Surface Defect
Defects that occur at the surface of a crystal, such as grain boundaries.

Example: Grain boundaries can influence the mechanical properties of metals.

Interstitial
An atom that occupies a space in the lattice that is not normally occupied.

Example: Carbon atoms in iron can act as interstitials, affecting its hardness.

Vacancy
A missing atom in the lattice structure, creating an empty site.

Example: Vacancies can increase the diffusion rate in solids.

Dislocation
A line defect in the crystal structure that allows deformation.

Example: Dislocations enable metals to deform under stress.

Related Topics

Crystallography
The study of crystal structures and their properties.
intermediate
Solid-State Physics
The study of rigid matter, particularly the behavior of solids.
advanced
Materials Engineering
The application of materials science principles to design and create new materials.
intermediate

Key Concepts

Point defectsLine defectsSurface defectsImpurities