Solid Structures (3)

Question 1

Face-Centered Cubic (FCC)

Answer 1

Composed of 14 atoms, with one entered on each face

Question 2

Body-Centered Cubic (BCC)

Answer 2

Composed of 9 atoms, with one entered in the middle

Question 3

Hexagonal Closed-Packed (HCP)

Answer 3

Composed of 15 atoms, with three in then middle row

Question 4

Phase

Answer 4

A form of material possessing a single characteristic structure and associated characteristic properties.

• Solid or liquid
• Pure substance or solution

Question 5

Substitutional Solid solution

Answer 5

where two or more different types of atoms fill a regular atom site within a lattice.

Question 6

Interstitual Solid Solution

Answer 6

Where solute atoms are found not in the regular lattice positions.

Question 7

Dendrites

Answer 7

Crystal growth produces a Crystalline solid that has closely packed atoms in fixed positions relative to each other.
- Dendrites become Grains

Question 8

Grain Structure

Answer 8

Grains + Grain Boundary.
Grains have a uniform Lattice structure, when the meet one another they form a grain boundary which is non-uniform and squished atoms.

• Grain are 3-10 atoms wide
• Coarse Grains
• Fine Grains