msep 503 defects, diffusion and transformation slide - defects · defect if an atom or ion is...
TRANSCRIPT
16/10/2019
1
Crystal Defect
1. Vector repositioned (if necessary) to pass through origin.
2. Read off projections in terms of unitcell dimensions a1, a2, a3, or c
3. Adjust to smallest integer values4. Enclose in square brackets, no commas
[uvtw]
1 2
3 4
0 – Dimensional Defects Point Defects
• Vacancy
• Interstitial
• Substitution
1 – Dimensional Defects Line Defects
• Edge Dislocation
• Screw Dislocation
Classification of Defects2 – Dimensional Defects
Plane Defects• Grain Boundary
• Stacking Faults
3 – Dimensional Defects Extended Defects
• Pores
• Cracks
1 2
3 4
16/10/2019
2
5 6
7 8
5 6
7 8
16/10/2019
3
9 10
11 12
9 10
11 12
16/10/2019
4
13 14
15 16
13 14
15 16
16/10/2019
5
17 18
19 20
17 18
19 20
16/10/2019
6
21 22
23 24
21 22
23 24