http://bzuiam.webs.com/

1. Particulate Composites
And
Their Applications
(c) Bob Cottis 1995

2. For more help contact me
Muhammad Umair Bukhari
Engr.umair.bukhari@gmail.com
www.bzuiam.webs.com
03136050151
(c) Bob Cottis 1995

3. Particulate Composites
A composite that consists of tiny
particles of one material embedded in
another material.
The particulates can be very small
particles (< 0.25 microns), chopped
fibers (such as glass), platelets, hollow
spheres, or new materials such as bucky
balls or carbon nano-tubes.
(c) Bob Cottis 1995

4. Particulate Composites
They provide reinforcement to the
matrix material thereby
strengthening the material. The
combination of reinforcement and
matrix can provide for very specific
material properties.
(c) Bob Cottis 1995

5. Advantages of Particulate
composites
 Provide reinforcement to the matrix material
 Improved material properties
 Tailored material properties
 Manufacturing flexibility
(c) Bob Cottis 1995

6. Advantages of Particulate
composites
 High creep resistance
 High tensile strength at elevated
temperatures
 High toughness
 High strength to weight ratio (low density high
tensile strength)
(c) Bob Cottis 1995

7. In Which Materials Particulate
Copmosite can be Used????
 Metals
(Aluminium alloy )
 Polymers(Rubber)
 Ceramics
(Concrete)
(c) Bob Cottis 1995

8. Applications
 Appliances, toys, electrical products,
computer housings, cell phone casings, office
furniture, helmets, etc. are made from
particulate reinforced plastics.
 Glass reinforced plastics are used in many
automotive applications including body
panels, bumpers, dashboards, and intake
manifolds.
(c) Bob Cottis 1995

9. Applications
 Brakes are made of particulate composite
composed of carbon or ceramics particulates.
 Cermets contain hard ceramic particles
dispersed in a metallic matrix. Eg.: tungsten
carbide (WC) or titanium carbide (TiC)
embedded cobalt or nickel used to make
cutting tools.
(c) Bob Cottis 1995

10. Applications
 Widely used for automotive applications
including pistons
 Concrete is cement strengthened by adding
particulates.
 Reinforced rubber is obtained by
strengthening with 20-50 nm carbon-black
particles. Used in auto tires.
(c) Bob Cottis 1995