1. MATERIALS

2.  CERAMICS HAVE A LONG HISTORY  CONTAIN OXIDES (EX. SiO 2 )  CERAMICS: A solid material obtained by heating inorganic matter.

3.  Made with traditional pottery techniques. Objects are made out of clay and baked.  Sand is used to make glass.

4.  Low electrical conductivity  High degree of hardness  Heat resistance, low thermal conductivity  Fragile  Can be corroded by acids and bases

5. and alloys

6.  Ferrous is an adjective used to indicate the presence of iron.  The word is derived from the Latin word ferrum (iron).Ferrous metals include steel and pig iron (which contain a few percent of carbon) and alloys of iron with other metals (such as stainless steel.)  The term non-ferrous is used to indicate metals other than iron and alloys that do not contain an appreciable amount of iron.

7.  The term non-ferrous is used to indicate metals other than iron and alloys that do not contain an appreciable amount of iron  i.e. Aluminum can.

8. MetalsMechanical properties Examples of uses AluminumMalleability, ductilitycans, electrical wires CopperDuctility, good conductorelectrical wires TinVery high ductility, resistance to corrosion submarines ZincHardness, resistance to corrosion pipes MagnesiumLight, malleabilityrims ChromeVery good hardnessprotective coatings against corrosion NickelDuctility, malleabilitycoins LeadMalleability, high density Cast iron TungstenDuctility, resistance to very high temperatures Lamp filaments

9.  An alloy is a solid solution or homogeneous mixture of two or more elements, at least one of which is a metal  i.e. Stainless steel (combination of iron and chromium)

10. Metal alloy CompositionMechanical properties Examples of uses Cast iron Iron: 93% Carbon: >2% Good conductivity Frying pan Stainless steel Iron: 74% Chrome: 17 % Tin: 8% Ductility Mechanical resistance Cutlery kitchen utensils High speed steel Iron : 99% Carbon: 0.6-1.3% Very good hardness Resistance to high temperatures Drills Cutting tools Mild steel Iron: 99% Carbon: 0.15-0.25% Hardness Weak resistance to corrosion Chains Tinplate Iron: 99% Tin Very pliable Resistance to corrosion Tin cans

11. Non ferrous alloysCompositionExamples of uses BrassZinc and copperMusical instruments BronzeCopper and tinWater faucets TitaniumTin and aluminumAirplane pieces