ceramics Compoites Alloys All That Jazz

Question 1

Are most every day use metals or alloys

Answer 1

Alloys

Question 2

What is bronze an alloy of

Answer 2

Copper and tin

Question 3

What is an alloy of copper and zinc

Answer 3

Brass

Question 4

What is gold jewellery alloyed with

Answer 4

Silver copper zinc

Question 5

18 carat gold is what %

Answer 5

75%

Question 6

Steel is an alloy of..

Answer 6

Iron with specific amounts of carbon and other metals

Question 7

Properties of high carbon steel

Answer 7

Strong but brittle

Question 8

Properties of low carbon steel

Answer 8

Softer and more malleable (easily shaped)

Question 9

What does stainless steel contain and what properties is it

Answer 9

Chromium and nickel, hard and corrosion resistant

Question 10

What alloys are low density

Answer 10

Aluminium

Question 11

Use of bronze and brass

Answer 11

Bronze: instruments
Brass: valves and plugs sockets

Question 12

High and low carbon and stainless steel use

Answer 12

Hand tools - high
Wire - low
Cooking equipment - stainless

Question 13

Transition metals properties against group 1

Answer 13

More dense, higher melting points, dont react strongly with water (copper, titanium, nickel), resistance to corrosion (iron no), decrease in reactivity as along

Question 14

Transition metal properties (7)

Answer 14

Coloured compounds, good conductors, malleable, ductile, hard and strong, catalysts, different ion charges

Question 15

WHat size particles are nano particles

Answer 15

1-100nm

Question 16

Fine particles size

Answer 16

Pm2.5
100-2500nm (1x10-7m to 2.5x10-6)

Question 17

Coarse particles size

Answer 17

Pm10, 1x10-5m - 2.5x10-6

Question 18

Nano particles have low/high sa:v

Answer 18

High so they make good catalysts

Question 19

Applications of nano particles

Answer 19

Medicine, electronics, cosmetics, Sun creams, deodorants, catalysts

Question 20

Most common glass and materials

Answer 20

Soda lime - sand (silicon dioxide), sodium carbonate, limestone

Question 21

Borosilicate glass material and property

Answer 21

Sand and boron trioxide, higher melting point

Question 22

How are clay ceramics made

Answer 22

Shaping wet clay and heating in a furnace

Question 23

Composites composition

Answer 23

Matrix _ most of material
Reinforcement - fibres or fragments

Question 24

Examples of composites

Answer 24

Fibre glass - polymer, glass fibres, in storage tanks
Concrete - cement and water, sand and stones, in building
Plywood - adhesives, wood fibres, in furniture