Design and Technology Materials Notes

What type of wood is known for its desirable grain and can corrode steel due to tannic acid?

Oak.

Which hardwood is recognized for its dark cherry wood color and interlocking grain?

Mahogany.

What is the main characteristic of beech wood?

Whitish color when steamed, tough, close grained, hard.

What type of metals are characterized by containing iron?

Ferrous Metals.

Which type of steel has a carbon content of 0.15% to 0.30% and is known for its ductility?

Mild steel.

What is the carbon content range for medium carbon steel?

0.30% to 0.70% Carbon.

Which non-ferrous metal is lightweight and can be MIG and TIG heat welded?

Aluminium.

What is Duralumin composed of, and what is its significant property?

4% Copper, 1% magnesium and manganese; it has equivalent strength properties to mild steel but is more lightweight.

What is the main characteristic of PMMA (Acrylic)?

Tough, hard, good chemical resistance, available in translucent and transparent colors.

Which thermosetting plastic is known for being rigid and chemical resistant, commonly used as adhesives?

Epoxy Resin.

What is the primary use of natural rubber?

Tires, hoses, footwear.

What is one use of carbon fiber reinforced plastic?

Bicycle frames.

Identify a type of paper commonly used for sketching due to its smooth surface.

Layout paper.

What is a key characteristic of corrugated board?

Provides protection against impact due to its structure.

Which natural fiber is known for its good breathability and high durability?

Linen.

What are the properties of nylon?

Does not absorb water, very durable, good elasticity, and good tear resistance.

How does reactive glass function?

It reacts to temperature changes by changing tint.

What is one application of thermochromic material?

Used for baby feeding spoons and thermometers.

What is QTC used for in technology?

It is pressure or force sensing and used in touch screen technology.