Question

List one each polymer, metal, & ceramic composites. (3 pts) a. b. c. List the matrix and reinforcement phases List the non-composite material it is replacing and the application (3 pts) List one improvement and one disadvantage per composite (3 pts)

Answer 1

(a) Elements of the polymer-network stage are:

1) to tie the strands together so that the connected pressure is conveyed among the filaments;

2) to protect the surface of the fibers from being damaged; and

3) to separate the fibers and inhibit crack propagation.

(b) Polymer Composites: It comprises of an assortment of short or consistent strands which are bound together by a natural polymer framework. Precedent Fibre material, Boron Carbon Graphite. Matrix material, thermoplastics, epoxy and thermoset materials.

Metal Composites: It is a composite material which has two constituents, one essential constituent is metal, other constituent may be different metal or another material, like ceramic or organic compound. Example, Aluminium metal composite.

Ceramic Composites: It is a subgroup of composite materials as well as a subgroup of ceramics. It consist of ceramic fibres which is embedded in a ceramic matrix The framework and filaments can comprise of any earthenware material. Model, Silicon Carbide clay.

Enhancements:

1. Polymer Composite: Graphene nanoplatelets are being used to improve mechanical properties.

2. Metal Composite: Techniques are being presented by including certain material which will lessen the expense of creation.

3. Fired Composite: One of the real obstruction that earthenware composites confront is Brittleness. Particulates, similar to hair, filaments, or texture materials, with various structures and introductions are utilized to improve the

toughness of ceramic composites which is done at elevated temperature in several advanced applications.

Disadvantages:

1. Polymer Composite:

Low abrasion resistance.

Dimensional insecurity

Combustibility

2. Metal Composite:

Limited applications due to higher weight.
High cost of production.

3. Ceramic Composite:

At the point when exposed to mechanical or warm, disastrous disappointment happens, reason being, earthenware production don't show plastic disfigurement.

Lack of toughness.

Steel and other auxiliary materials are being supplanted by utilizing the composites since they are light in weight and has high quality

They are also corrosion resistance which makes them perfect for the use of heavy machines.

Applications of Composites:

Vehicle industry

Avionic business