Question

4. Composites Material
a. Define about composites and what the principle of combine action?
b. What is the distinction between matrix and dispersed phases in a composite ?
c. Material composites were classified as particle-reinforced, fiber-reinforced, structural, and nanocomposites. Explain!

Answer 1

a. Composites are a combination of two or more material. When the materials are combined they retain their identities and can be physically identified. Composites are artifically made. The principle of combined action is nothing but the combination of two or more materials to have better properties.

b. In matrix, the consitutent is called the reinforcing phase and the other one in which the reinforcing phase is embedded is called matrix. Dispersed phase is comprises of two heterogeneity material where it is separated by a sharp interface.

c. Particle-reinforced. A good example is nothing but cement strengthening with particles. The sand and stone added to the cement allows better packing

Example - Concrete = cement matrix + sand/gravel particles

Fibre-reinforced - Are engineered material which posses heavy weight and strength. They are used as a substitute of wood and metal.

Example - Fibre glass and carbon.

Structural - Structure composites ar made from plastic , wood, glas etc to have smooth and flexibility to avoid breakage.

Example - Largeused in automotive industry

Nanocomposites - Nanocomposites is a multiphase material which is a combination of one or two or three dimensions of less than 100 mm

Example - Nylon, Elastin etc.