Developments in new materials Flashcards
what is a modern material
a material that has been engineered to have improved properties
examples of modern materials
Concrete, aluminium and steel, graphene, titanium, metal foams
properties of graphene
- single carbon layer material
- very strong, 100x stronger than steel
- light
- good conductor of heat and electricity
- used in tennis rackets
properties of titanium
- corrosion resistant
- high strength to weight ratio
- difficult and therefore expensive to machine
- used for bone replacements, bikes, ships, armour
properties of metal foams
- metal foam is a metal that contains many gas filled spaces which make it LIGHTWEIGHT
- stiff
- tough
- strong under compression
- used in lightweight car parts(as they can absorb shock) and bone implants
properties of LCDs
- used in flat screen displays
- thin
- lightweight
- energy efficient
- originally used in calculators
- high definition displays
how do LCDs work in a display
- the liquid crystals used in the display are made of a mixture of chemicals
- when an electrical current is passed through, the crystal shape is modified
- this changes the image seen on the screen
properties of nanomaterials
- made out of nanoparticles
properties of carbon nanotubes
- high strength to weight ratio
- good conductors of heat and electricity
- can be added to a material to strengthen it without adding much weight
properties of self cleaning fabrics
have a nanoparticle coating that removes odours and stains upon exposure to light
properties of antibacterial fabrics
use nanoparticles of silver to kill bacteria, also have medical uses like face masks and dressings
properties of coated metals
- iron and steel can be galvanised to prevent rusting, they can also be elctroplated
what is anodised aluminium
has a coating of aluminium to make the surface harder and resistant to corrosion
PVC coated metals
metals like steel can be coated with PVC to make it corrosion resistant
what is a smart material
materials that change their properties in response to a stimuli