C - Alloys

Question 1

Why are alloys harder than pure metals?

Answer 1

Because the different sized atoms distort the layer of metal atoms, making it difficult for them to slide over each other.

Question 2

How do you create an alloy?

Answer 2

By mixing two metals together or a metal and a non metal

Question 3

Iron straight from the blast furnace is only 96% iron, the rest of the impurities are used to make ______ ______ which is good for making ornamental railings but not much else because it’s ________

Answer 3

Cast iron

Brittle

Question 4

After all the impurities from copper have been removed by the blast furnace, what does the pure iron structure look like?

Answer 4

A regular arrangement of identical atoms that slide over eachother, this makes the iron soft and easily shaped

Question 5

What’s an alloy?

Answer 5

Two metals or a non metals mixed together

Question 6

Most iron is converted into….

Answer 6

Steel

Question 7

Name the 3 main types of steel and their % of carbon if they have any…

Answer 7

• Low carbon steel (0.1% carbon)
• High carbon steel (1.5% carbon)
• Stainless steel (chromium and sometimes nickel added)

Question 8

What are the properties and uses of Low carbon steel (0.1%)?

Answer 8

It can be easily shaped, good for car bodies

Question 9

What are the properties and uses of high carbon steel (1.5% carbon)?

Answer 9

Very hard, inflexible - useful for cutting tools and bridges

Question 10

What are the properties and uses of stainless steel?

Answer 10

Corrosion resistant and can be used for cutlery or containers for corrosive substances

Question 11

What two metals are alloyed together to make bronze? And what’s the uses of bronze?

Answer 11

Copper and tin - its harder for things like statues

Question 12

What two metals are alloyed together to make cupronickel? And what’s the uses of cupronickel?

Answer 12

Hard and corrosion resistant for the use of ‘silver’ coins