Jawaharlal Nehru Technological University Hyderabad B.Tech IV NANOCOMPOSITES Previous Question Paper (September 2020 - R16)

Nanocomposites are widely utilized across various industrial sectors due to their superior mechanical, thermal, and electrical properties compared to conventional materials. Key applications include:

• Automotive and Aerospace: Used for lightweight structural components, fuel tanks, and interior panels to improve fuel efficiency and impact resistance.
• Electronics: Employed in conductive coatings, electromagnetic interference (EMI) shielding, and as high-dielectric constant materials for capacitors and sensors.
• Biomedical: Utilized in bone tissue engineering, dental fillings, and drug delivery systems due to their biocompatibility and ability to mimic natural tissue structures.
• Energy: Applied in battery electrodes, fuel cell membranes, and solar cells to enhance charge transport and thermal stability.
• Packaging: Used in food packaging to provide superior gas barrier properties (blocking oxygen and moisture), thereby extending shelf life.

Strength and plasticity are fundamental mechanical properties that describe how a material responds to applied forces. Strength is the ability of a material to withstand an applied load without failure or permanent deformation, typically measured by yield strength or ultimate tensile strength. It represents the resistance to the initiation of plastic flow.

In contrast, plasticity is the ability of a material to undergo permanent (irreversible) deformation under stress without fracturing. It indicates the material's capacity to be shaped, formed, or stretched.