Alloy

9.1 Alloy
 
Alloy

An alloy is a mixture of several types of metals or a mixture of metal and non-metal by a certain percentage

Purpose of alloying:

  • To increase the hardness and strength of metal
  • To prevent corrosion or rusting
  • To improve the appearance of the metal surface
 
Properties of alloy
 

 
Alloy Properties and Uses

Steel

  • Iron 99%
  • Carbon 1%
  • Hard and strong
  • Construction materials for buildings and bridge
  • To make frame of vehicles and railway tracks

Pewter

  • Tin 96%
  • Copper 3%
  • Antimony 1%
  • Lustre
  • Resistant to corrosion
  • To make decorative items such as photo frame

Bronze

  • Copper 88%
  • Tin 12%
  • Hard
  • Resistant to corrosion
  • Attractive colour
  • To make monuments, metak sculptures, coins, medals and others

Brass

  • Copper 75%
  • ZInc 25%
  • Strong
  • Has shony surface
  • Malleable
  • Gold in colour
  • To make keys, door knobs, musical instruments such as trumpet

Duralumin

  • Alluminium 95%
  • Copper 3%
  • Magnesium 1%
  • Manganese 1%
  • Light
  • Strong
  • Resistant to corrosion
  • To make frame of aircrafts, aeroplanes and others
 
The arrangement of atoms in pure metals and alloy
Pure metals Alloy
  • Metals are ductile because when force is applied, layers of atoms in pure metal slide.
  • Metals are malleable because there are empty space between the atoms.
  • The presence of atoms of other metals that are of different sizes disturb the orderly arrangement of atoms in the metal.
  • This reduces the layer of atoms from sliding.
  • Thus, an alloy is stronger and harder than its pure metal.
 
The use of alloys in daily life
Alloy Uses
Duralumin
  • To make the body of aeroplane light and strong
Brass
  • To make some musical instrument shiny and resistant to corrosion
Superconductor
  • To construct railway track to make sure the train moves by floating
  • To prevent friction between thr track and the body of train

 

 

Alloy

9.1 Alloy
 
Alloy

An alloy is a mixture of several types of metals or a mixture of metal and non-metal by a certain percentage

Purpose of alloying:

  • To increase the hardness and strength of metal
  • To prevent corrosion or rusting
  • To improve the appearance of the metal surface
 
Properties of alloy
 

 
Alloy Properties and Uses

Steel

  • Iron 99%
  • Carbon 1%
  • Hard and strong
  • Construction materials for buildings and bridge
  • To make frame of vehicles and railway tracks

Pewter

  • Tin 96%
  • Copper 3%
  • Antimony 1%
  • Lustre
  • Resistant to corrosion
  • To make decorative items such as photo frame

Bronze

  • Copper 88%
  • Tin 12%
  • Hard
  • Resistant to corrosion
  • Attractive colour
  • To make monuments, metak sculptures, coins, medals and others

Brass

  • Copper 75%
  • ZInc 25%
  • Strong
  • Has shony surface
  • Malleable
  • Gold in colour
  • To make keys, door knobs, musical instruments such as trumpet

Duralumin

  • Alluminium 95%
  • Copper 3%
  • Magnesium 1%
  • Manganese 1%
  • Light
  • Strong
  • Resistant to corrosion
  • To make frame of aircrafts, aeroplanes and others
 
The arrangement of atoms in pure metals and alloy
Pure metals Alloy
  • Metals are ductile because when force is applied, layers of atoms in pure metal slide.
  • Metals are malleable because there are empty space between the atoms.
  • The presence of atoms of other metals that are of different sizes disturb the orderly arrangement of atoms in the metal.
  • This reduces the layer of atoms from sliding.
  • Thus, an alloy is stronger and harder than its pure metal.
 
The use of alloys in daily life
Alloy Uses
Duralumin
  • To make the body of aeroplane light and strong
Brass
  • To make some musical instrument shiny and resistant to corrosion
Superconductor
  • To construct railway track to make sure the train moves by floating
  • To prevent friction between thr track and the body of train

 

 

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