What are the main differences between ferrous and non-ferrous metals?
Ferrous metals are iron based, they are magnetic, stronger and more prone to corrosion. NF metals are not iron based, non magnetic and corrosion resistant.
Imagine you need to design a lightweight and strong bicycle frame. Which type of material would you use:
A composite
A metal
A polymer
Describe two key differences between ceramics and polymers and give an example of a product made from each material.
Ceramics: heat resistant and electric insulator, strong and brittle. Polymers: heat sensitive, flexible, lightweight.
What makes smart materials "smart"? Give one example of a smart material and describe how it is used.
They react to external stimuli in a controlled and reversible way. Example: nitinol.
Can you describe what biomaterials are and give an example of how they are used to improve human health?
Materials able to interact with biological systems. Dental implants, prosthetics, drug delivery systems.
Why is it important to consider both chemical and mechanical properties when selecting a material for a specific application?
Because they determine how well the material will perform in its application.
Can you describe one example of a composite material and explain why it is better than its individual components?
Combinations create a material that is stronger than steel but much lighter, making it superior to its individual components.
Metals are often used in construction and transportation. What are two advantages and two disadvantages of using metals for these applications?
Adv.:High Strength and Durability, Malleability and Ductility. Disadv.: Corrosion and weight.
Plastics are widely used in everyday life, but they also have an environmental impact. What are some benefits of plastics and what are some problems they cause?
Benefits: Lightweight and Durable, cheap and versatile. Disadv.: environmental pollution and microplastic contamination.
Can you describe one material with an interesting physical property and explain how that property makes it useful?
Aerogel: material with exceptional insulation capacity and low density. Used for space exploration, construction, protective clothing
