Ceramics, Composites and Polymers

Question 1

What does materials strength mean

Answer 1

Resistance of a material to an applied force

Question 2

What does brittle mean

Answer 2

Snap easily

Question 3

What are properties of ceramics

Answer 3

Hard
Brittle
Heat resistant
Corrosion resistant

Question 4

How are ceramics made

Answer 4

Made by shaping then firing non metallic material at high temperatures where it hardens and sets

Question 5

What are the 2 types of ceramics

Answer 5

Clay ceramics
Glass

Question 6

Examples of clay ceramics

Answer 6

Brick
China
Porcelain

Question 7

How are clay ceramics made

Answer 7

Shaping when wet
Heating
Hardens

Question 8

Properties of clay ceramics

Answer 8

High compressive strengths

Question 9

Types of glass

Answer 9

Soda lime glass
Brosilicate glass

Question 10

What are the components of soda lime glass

Answer 10

Sodium carbonate
Silicon oxide
Limestone

Question 11

Components of borosilicate glass

Answer 11

Sand
Boron trioxide

Question 12

Which type of glass has a higher melting point

Answer 12

Borosilicate glass

Question 13

Properties of glass

Answer 13

Transparent
Strong
Good thermal insulator (windows)

Question 14

What are composites

Answer 14

2 or more materials with different properties combined to make a desirable material most are made from two components.

Question 15

What are the two components of composite materials?

Answer 15

Reinforcement
The matrix

Question 16

What is reinforcement?

Answer 16

Often long fires or fragments

Question 17

What is the matrix

Answer 17

Find reinforcement together, usually start soft and hardens

Question 18

What are polymers

Answer 18

Large molecules of high relative molecular mass.
links of smaller molecules called monomers

Question 19

What do the properties of polymers depend on?

Answer 19

The monomers it was made from
conditions of the chemical reaction

Question 20

Properties of polymers

Answer 20

Flexible
Easily shaped
Good insulators of heat and electricity

Question 21

What are the conditions needed for low density polythene?

Answer 21

Moderate Temperature
High pressure
Catalyst

Question 22

What are the properties of Low density polyethene ?

Answer 22

More flexible, but weaker

Question 23

What are the uses for low density polyethene

Answer 23

Carrier bags

Question 24

What are the conditions needed for high density polyethene

Answer 24

low temperature
Low pressure
Catalyst

Question 25

What are the properties of high density polyethene?

Answer 25

More rigid but stronger

Question 26

What are the uses for high density polyethene ?

Answer 26

Drain pipes

Question 27

What are thermosoftening polymers?

Answer 27

Made up of lots of polymer chains held together by weak intermolecular forces

Question 28

What happens when thermosoftening polymers are heated?

Answer 28

They break easily causing it to melt

Question 29

What can you do to thermosoftening polymers after they have melted?

Answer 29

Can be remoulded into a different shape and hardened when cooled

Question 30

What are Thermosetting polymers?

Answer 30

Made from lots of polymer chains held together by strong covalent bonds

Question 31

What happens when thermosetting polymers are heated?

Answer 31

They require a lot of energy to break, so don’t soften when heated

Question 32

Properties of thermosetting polymers

Answer 32

Hard Strong Rigid

Question 33

Key difference between alloys and metals

Answer 33

Alloys are not malleable Metals are malleable