Quiz 5: Microstructure Defects and Diffusion

How many atoms are in 1 cubic cm?

10²² to 10^24

Which are the highly packed volume crystal structures?

fcc and HCP > bcc and bct

About how big is an atom?

10^-9

About how big is a microstructure?

10^-4

What are the 3 classes of defects?

Point

Dislocation (Line defects)

Grain boundary (Planar defects)

What are the 4 point defects?

Schottky (vacancy)

Frenkel (pure interstitial)

Impure substitutional

Impure interstitial

What are the 2 line defects?

Screw and Edge

When you increase temperature, what happens to number of vacancies?

More vacancies occur