Composites

Composites

1. Two or more materials combined to create a material with enhanced properties

2. Fibre reinforced composites

   • Eg: Carbon reinforced plastic, glass reinforced plastic, concretes mixed with fibre, kevlar
   • Good strength to weight ratio, resistant to corrosion, good fatigue resistance, flame resistance
   • Releasing agent, apply gel coat, leave, apply polyester resin and grp, leave
   • Body protection, sports equipment, sails, gloves, car body parts, suspension

3. Particle-based composites

   • Eg: Tungsten carbide, titanium carbide, concretes
     • Tungsten carbide is a mixture of tungsten and cobalt. Used for sharp cutting tools
       • Manufactured by sintering
       • Tough, shock resistant and resistant to high temps
   • Concrete can be reinforced with tensioned rods to allow longer beams and to stop cracking
     • Can be cast on site, components are readily available, high strength in compression

4. Sheet-based composites

   • Eg: Plywood, chipboard, MDF, hardboard, metal sheets layered with polymer sheets
     • Chipboard floor boards; cheaper and large areas can be covered at once, needs to be covered
   • ALU composite; aluminium sheet and polyethylene core
     • Lightweight, impact resistance and good rigidity