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Definition
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| homogeneous mixture where crystal structure is maintained when solute atoms are added (no new crystal structure formed) |
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Definition
vacancies
self-interstitials
impurities |
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| Linear defects are also called |
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Definition
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| 3 types of linear defects |
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Definition
edge dislocation
screw dislocation
mixed dislocation |
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| extra half plane of atoms in a crystal |
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| both screw and edge dislocations |
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Burger's vector vs.
dislocation line |
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Definition
dislocation line of edge: perpendicular
dislocation line of screw: parallel |
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Definition
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| 5 types of planar defects |
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Definition
external surfaces
grain boundaries
twin boundaries
stacking faults
phase boundaries |
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Definition
| dangling bonds have higher energy, so material wants to minimize this surface area |
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Definition
| mismatch of crystal orientation |
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Definition
| grain boundary with mirror symmetry |
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Definition
| exist in multiphase materials across which there is a sudden change in characteristics |
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Definition
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Definition
point defect that occurs in ionic materials
cation moves to interstitial site |
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Definition
point defect that occurs in ionic materials
missing ion pair (1 cation and 1 anion missing) |
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Term
| for diffusion to take place, |
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Definition
there must be a place for the atom to go
atom must have enough energy to overcome the barrier of breaking bonds and causing lattice distortion |
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Term
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Definition
| spontaneous movement of matter caused by atomic /molecular kinetic energy |
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| activation energy for self diffusion _____ with bond energy |
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Definition
| activation energy up and bond energy up |
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Definition
| chemically and structurally homogeneous state of matter |
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Definition
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Definition
1. <15% difference in size
2. <0.5 difference in electronegativity
3. same valence
4. same crystal structure |
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