C10 Flashcards
What are ceramics
Non metal solids with high melting points that arnt made from carbon based compounds
What are some examples of ceramics
Glass and clay
How is clay made
Dug up from ground, wtter and molded into diferent shapes and then cooked at high temp in a furnace
How is glass made
. Sodalime glass - heat mixture of limestone, sand and sodium carbonate
. Borosilicate - made of sand and boron trioxide
What are composites
Materials made of one material embedded in another. Fibres or fragments of a material (reinforcement) are surrounded by a matrix acting as a binder
What are some examples of composites
. Fibreglass
. carbon fibre
. Concrete
. Wood
Describe low density polymers
Made at moderate temps under high pressure. Flexible. Used for bags and bottles
Describe high density polymers
. Made at lower temp and pressure with a catalyst. More rigid. Used for water tanks and drain pipes
What are thermosoftening polymers
Individual polymer chains entwined together with weah forced between the chains. Can be melted and remoulded
What are thermosetting polymers
Contains monomers wich can create crosslinks between the polymer chains, holding the chains together in a solid structure. Don’t soften when heated
What are the properties of ceramics
Insulators of heat and electricity
Brittle
Stiff
Proper it’s of polymers
Insulators
Flexible
Easily moulded
Properties of composites
Depend on matrix/binder and the reinforcement. Have diferent uses
Properties of metal
Malleable
Good conductor electricity
Ductile
Shiny
Stiff
What is corrosion and what metals does this occur with
This is when metals react with substances in thier environment and are gradually destroyed. Occurs with iron and steel
