Other Materials

Question 1

Composites (definition)

Answer 1

materials consisting of two or more materials from different classifications to combine and improve the properties of both materials

Question 2

Examples of Composites and the materials they consist of (7)

Answer 2

CFRP (carbon fibre reinforced polymer) : consists of Carbon fibres and thermosetting polyester resin

GRP (glass reinforced polymer) : glass fibres mixed with polyester resin

Tungsten carbide: ceramic and tungsten particles ( sometimes with cobalt as well )

aluminium composite board : Aluminium sheets with a polyethylene core between them

reinforced concrete : concrete (sand, cement, aggregate and water) and low carbon steel bar

fibre cement: concrete with steel fibres mixed into it

engineered wood: (e.g. MDF) timbre veneer and MF adhesives

Question 3

Smart materials (definition)

Answer 3

a material that can respond to an input from their environment with a change in physical properties

Question 4

SMA (shape memory alloy)

Answer 4

metal alloys which change shape with a change in temperature or electrical current

Question 5

thermochromic pigments

Answer 5

changes colour in response to temperature

Question 6

phosphorescent pigments

Answer 6

absorbs light and then re-emits it in the dark

Question 7

photochromic

Answer 7

changes colour in response to light

Question 8

electroluminescent wire

Answer 8

copper wire with a phosphorescent coating that glows with an A.C

Question 9

Piezoelectric material

Answer 9

gives an electric current when deformed and increases under an electric current

Question 10

Modern materials (define )

Answer 10

materials developed there the invention of new or improved processes and evolve as technology advances