ceramics Compoites Alloys All That Jazz Flashcards
Are most every day use metals or alloys
Alloys
What is bronze an alloy of
Copper and tin
What is an alloy of copper and zinc
Brass
What is gold jewellery alloyed with
Silver copper zinc
18 carat gold is what %
75%
Steel is an alloy of..
Iron with specific amounts of carbon and other metals
Properties of high carbon steel
Strong but brittle
Properties of low carbon steel
Softer and more malleable (easily shaped)
What does stainless steel contain and what properties is it
Chromium and nickel, hard and corrosion resistant
What alloys are low density
Aluminium
Use of bronze and brass
Bronze: instruments
Brass: valves and plugs sockets
High and low carbon and stainless steel use
Hand tools - high
Wire - low
Cooking equipment - stainless
Transition metals properties against group 1
More dense, higher melting points, dont react strongly with water (copper, titanium, nickel), resistance to corrosion (iron no), decrease in reactivity as along
Transition metal properties (7)
Coloured compounds, good conductors, malleable, ductile, hard and strong, catalysts, different ion charges
WHat size particles are nano particles
1-100nm
Fine particles size
Pm2.5
100-2500nm (1x10-7m to 2.5x10-6)
Coarse particles size
Pm10, 1x10-5m - 2.5x10-6
Nano particles have low/high sa:v
High so they make good catalysts
Applications of nano particles
Medicine, electronics, cosmetics, Sun creams, deodorants, catalysts
Most common glass and materials
Soda lime - sand (silicon dioxide), sodium carbonate, limestone
Borosilicate glass material and property
Sand and boron trioxide, higher melting point
How are clay ceramics made
Shaping wet clay and heating in a furnace
Composites composition
Matrix _ most of material
Reinforcement - fibres or fragments
Examples of composites
Fibre glass - polymer, glass fibres, in storage tanks
Concrete - cement and water, sand and stones, in building
Plywood - adhesives, wood fibres, in furniture
