Crystallization

Question 1

What is atomic structure?

Answer 1

Mechanical and physical properties of materials based on atom arrangement and behavior

Question 2

Grains are made of small repeating __________.

Answer 2

Crystals

Question 3

An area where dendrites meet is called a _________ _________.

Answer 3

Grain boundary

Question 4

What is allotropy?

Answer 4

The ability for a metal to exist in more than one crystal structure

Question 5

What is an alloy?

Answer 5

Metal made of 2 or more elements, at least one being metallic

Question 6

What are the 3 types of crystal structure?

Answer 6

1) BCC: Body Centered Cubic, 9 atoms one at each corner and one in the centre

2) FCC: Face Centered Cubic, 14 atoms one at each corner and one at the centre of each six faces

3) HCP: Hexagonal Close Packed, 17 atoms one at each corner one in the center of each face and three midplane interior atoms

Question 7

What is referenced by solute and solvent when talking about metals?

Answer 7

Solvent - Present in greatest amount

Solute - denote an element present in smaller amounts

Question 8

What can cause errors during crystal forming?

Answer 8

1) Impurities
2) Thermal stress due to rapid cooling
3) Uneven solidification
4) Plastic deformation

Question 9

What are the 3 types of crystal defects?

Answer 9

1) Point defect
2) Line defects
3) Interfacial defects