3.1.1 Classification of Materials

Question 1

What is a ferrous metal ?

Answer 1

A ferous metal contains iron and carbon, Ferrous metals are magnetic and will rust

Question 2

What are examples of ferrous metals ?

Answer 2

Low carbon steel, medium carbon steel , cast iron

Question 3

What is a non ferrous metal

Answer 3

A metal that does not contain iron, they are not magnetic and do not rust.

Question 4

Examples of non ferrous metals

Answer 4

Aluminium, copper, Zinc, silver , gold , titanium , tin

Question 5

What is an alloy ?

Answer 5

A metal made of two or more metals.

Question 6

what are some examples of ferrous alloys

Answer 6

stainless steel , die steels (tool steel)

Question 7

what are some examples of non ferrous alloys

Answer 7

broze brass, pewter

Question 8

What are hardwoods

Answer 8

Woods from deciduous (broad leafed) trees. These trees are generally slow growing and lose their leaves in autumn.

Question 9

What are softwoods

Answer 9

A wood from a coniferous tree (cone bearing )
fast growing evergreen trees

Question 10

What are some examples of Hardwoods ?

Answer 10

Oak , Ash , mahogany teak , birch , beech

Question 11

What are some examples of softwoods ?

Answer 11

pine , spruce, douglas fir , redwood , cedar , larch

Question 12

what are manufactured boards ?

Answer 12

A man man wood wood based composite material
availible in much larger sizes than solid wood.

Question 13

what are some exaples of manufactured boards

Answer 13

Plywood, aeroply , flexi ply , MDF chipboard

Question 14

What are Thermoplastics ?

Answer 14

A material that can be repeatedly reheated and reshaped allowing it to be recycled.
They have a long chain of molecules.

Question 15

What are some examples of Thermo plastics ?

Answer 15

LDPE - HDPE - PP - HIPS - ABS - PMMA PET , nylon , PVC

Question 16

What are thermosetting polymers ?

Answer 16

A material which when heated undergoes chemical chnage where the moleculed form ridgid cross links.
They cannot be reheated and reshaped at high temperatures

Question 17

What are some examples of thermosetting polymers ?

Answer 17

UF - MF polyester resin , expoxy resin.

Question 18

What is an elastomer ?

Answer 18

elastomers are materials that can be deformed and then turn back to original shape. They have weak bonds which allow them to be stretched

Question 19

What are some examples of elastomers ?

Answer 19

Natural rubber, polybutadiene , neoprene, silcone.

Question 20

What are paper boards ?

Answer 20

They are compliant materials, that can be scored folded and cut.

Question 21

What is composite material ?

Answer 21

A composite material is material made up of two or more materials that enhance the properties of the material.

Question 22

What are some examples of composite material ?

Answer 22

carbon fibre reinforced plastic, glass fibre reingofrced plastic , concrete

Question 23

What is a smart material ?

Answer 23

A smart material whos physical properties change in response to an stimulus , when the stimulus is removed the properties change back.

Question 24

Whare some examples of smart materials ?

Answer 24

Shape memory alloys , thermochromatic pigment , phosphhorescent pigment, photochromatic pigment.

Question 25

What is a modern material ?

Answer 25

A modern material is a material that have been developed through the invention of new or improved processes.

Question 26

What are some examples of the modern modern materials ?

Answer 26

kevlar, high density modelling foam, polymorph