Materials that are used as raw material for any sort of construction or manufacturing in an organized way of engineering application are known as Engineering Materials. For example, the computer or the pen we use, are manufactured through controlled engineering processes. These gadgets make use of materials like HDPE, PP, Pb-Silica glass, copper, aluminium, tin, etc. in their fabrication. Civil construction works like bridges, dams, houses, roads, pavements are carried out with raw materials like stone, chips, cement, clay, paint, bars, etc.
Metals are usually characterized by a well defined crystal structure. They are bonded together by means of metallic bonds which maintain an electron cloud. This electron cloud is crucial for the high electrical and thermal conductivity characteristic to metals.
Hardness
Thermal and electrical conductivity
Malleability
These are basically amorphous or complex crystalline structure with strong ionic bonds. Due to this amorphous nature, they do not have an electron community. In absence of this, the electrical conductivity and thermal conductivities take a toll. With the strong ionic bonds between them, it takes a lot of energy to activate and displace atoms from bonds. Hence ceramics are extremely heat resistant.
High thermal and electrical resistance
High resistance to corrosion
Polymers are usually long chain organic macro-molecules with covalent bonds. Each molecule is formed from a large number of unitary molecules known as Monomer. For this reason, the polymers can be bent and stretched easily. In certain polymers some of the molecules cross link with each other there by increasing the strength across the molecules.
Ductile / soft
Low thermal stability
Lightweight (But high molecular weight)
Poor conductor of heat and electricity (With exception of PPV, etc.)
These are macro-physical combination of different phases where the aim is to combine beneficial properties of the constituent materials. Hence, very clear and abstract knowledge
For More Details about the Engineering Materials visit : Advanced Materials 2019
Brochure Details : https://advancedmaterials-research.pulsusconference.com/conference-brochure
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