Introduction Flashcards
What is the definition of composite material?
A material deliberately made from a combination of 1 or more constituent to give advantage of properties.
What are composites?
2 - phase material => metal, ceramic, polymer.
Particle reinforced => size, arrangement, shape, materials.
Fibre reinforced => short, continuous, orientation, arrangement, materials.
Composite structure => Laminated material, sandwich panels.
What are the advantages of composite material?
- Increased stiffness.
- Increase strength.
- Reduced density.
- Increased toughness.
- Increased temp resistance.
- Improved processibility.
- Lower cost.
- Modified electrical conductivity.
- Modified thermal, optical, magnetic.
- Improved corrosion resistance.
- Lower gas permeability.
- Modified dynamic behaviour.
What are some uses for metal matrix composite?
Abradable composite:
- Sacrificial layers help seal engine by reducing clearance gaps.
Automotive:
- Aluminium-graphite particle composite piston and cylinder liner.
Cermet:
- Ceramic particles (for high hardness).
- Metallics matrix (for toughness + formability.
What are some uses for ceramic matrix composite?
Concrete:
- Ceramic matrix + ceramic particle composite.
- More formable than stone.
Ceramic Nanocomposite:
- Carbon nanotube added to ceramic material.
- Provide added toughness.
What are some uses for polymer matrix composite (fibre reinforced polymer composite)?
- In aerospace.
- Helicopter blades.
- Construction.
- Maritime.
- Water tanks, pipes.
- Oil field.
- Kevlar.
- Wind turbine.
- Automotive.
- Motorcycle.
- Tennis ball.
- Medicine.
- Skis.
- mobile phones.
For particle reinforced polymer: Why are tyres black?
- rubber reinforced with carbon black (world first nano-composite).
- Carbon black provides, increased strength, stiffness, abrasion resistance, UV resistance.
What are polymer nano-composite use for?
Polymer nanocomposite -
polymer reinforcement, electric insulation, Gas/liquid barrier, flame retardancy.
