Question
Download Solution PDFWhich of the following is NOT a point defect?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation
Imperfection/Defect:
- An ideally perfect crystal in one which has same unit cells and contains some lattice point throughout the crystals
- Imperfections or defect is generally used to describe any deviation of the ideally perfect crystal from the periodic arrangement of its constituents. Defects can exist in any solid material.
Crystalline defects:
- Crystalline defects mean a lattice irregularity having one or more of its dimensions on the order of an atomic diameter
- Defects in the crystalline structure can have a tremendous effect on material behaviour.
- Physical, electrical, magnetic and the optical properties of crystalline materials can be modified by controlling the imperfections in their lattice structure
- For ease of their characterizations defects are classified on the basis of their geometry.
Classification of structural imperfection
|
Point Defect(0D) |
Line Defect(1D) |
Surface Defect (2D) |
Volume Defect(3D) |
|
Vacancies Self Interstitialcy Impurities
Frenkel Defect Schottky Defect
|
Edge Dislocation Screw Dislocation |
Grain boundaries Low angle boundaries
Twin boundaries Stacking Fault |
Casting defects Welding Defects Forming Defects |
Last updated on May 17, 2025
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