Particulate Composites And Their Applications(c) Bob Cottis 1995
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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
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
Advantages of Particulate composites Provide reinforcement to the matrix material Improved material properties Tailored material properties Manufacturing flexibility(c) Bob Cottis 1995
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
In Which Materials Particulate Copmosite can be Used???? Metals (Aluminium alloy ) Polymers(Rubber) Ceramics (Concrete)(c) Bob Cottis 1995
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
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
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
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