Alloy

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Alloy (??)

• homogenous (??) mixture of metals

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? Define alloy.

• Alloy is a homogenous mixture containing mainly
  metal.

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Distortion(??) of pure metal

• Pure metal consists of 1 kind of atoms only and
  can be distorted (??) easily by an external (??)
  force.

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Alloy (??) hardening by the presence of exotic
(??) atoms
An alloy is usually harder than its constituent
(???) element because the presence of different
atoms prevent the layers of atom from sliding
over (??) each other.
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? Why is alloy usually harder than pure metal ?
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? Why is alloy usually harder than pure metal ?

• In pure metal, the metals atoms are arranged
  regularly and the layers of atoms can slide over
  each other easily.
• In alloy, the presence of atoms with different
  size prevent the layers of atoms sliding over
  each other. This makes the alloy harder than pure
  metal.

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? Depending on the properties of the alloys,
suggest an use of each alloy.
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Steel - Structure
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Steel - Bridge
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Stainless steel - Cutlery
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Brass - Ornament
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Brass Chromium plated water tap
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Brass Musical Instrument
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Brass - Ornament
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Duralumin - Aeroplane
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Solder Soldering (Welding)
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Bronze - Sword
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Coinage metal - Coin
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Carat gold Golden watch
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