Sub-topic: Alloys
Question to ponder: What are alloys?
- A mixture of two or more elements where at least one of the elements is a metal . [E.g. Iron & Carbon = Steel]
- The properties of metal depends on thestructure of the metalitself.
Question to ponder: Since pure metals are soft, why does most metal products around us are harder and stronger?
- Metals can be made harder and stronger by alloying them with other elements.
- The added elements are usually metals. sometimes a non-metal such as carbon is also added. E.g. Steel (made up of iron and carbon).
What happens when force is applied to an alloy?
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Comparison of the properties of metals and alloys:
Pure Metal
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Alloy
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Uses of Alloys:
- Brass (Copper and Zinc) : Electric Plug
- Bronze (Copper and Tin): Propellers
- Duralumin (Aluminium and Copper) : Aircraft body
- Pewter (Lead, Tin, some Antimony): Souvenirs
- Solder (Tin and Lead): Joining electrical connections
- Stainless steel (Iron, Chromium / Nickel): Cutlery
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