Materials And Their Properties Flashcards

1
Q

Ceramics

A

Non-metal solids with high melting points

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2
Q

2 examples of ceramics

A

Clay

Glass

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3
Q

Composites

A

Made of 1 material embedded in another

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4
Q

What do the properties of a composite depend on?

A

Properties of the materials it is made from

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5
Q

4 examples of composites

A

Fibreglass

Carbon fibre

Concrete

Wood

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6
Q

What 2 things can influence the properties of a polymer?

A

How it’s made and what it’s made from

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7
Q

Low density poly(ethene)

A

Made from ethene

Moderate temperature under high pressure with catalyst

Flexible

Used for bags and bottles

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8
Q

High density poly(ethene)

A

Made from ethene

Lower temperature and pressure with different catalyst

More rigid

Used for water tanks and drainpipes

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9
Q

What determines type of bonds that form between the polymer chains?

A

Monomers

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10
Q

Thermosetting polymers

A

Monomers form cross-links between chains

Solid structure

Don’t soften when heated

Strong, hard and rigid

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11
Q

Thermosoftening polymers

A

Individual polymer chains

Weak forces between chains

Can melt polymers and remould

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12
Q

What is needed for iron to rust?

A

Air and water

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13
Q

2 main ways to prevent rusting

A

Coat iron with a barrier

Sacrificial method

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14
Q

Alloys

A

Made by adding an element to a metal

Disrupts structure of metal

Makes alloys harder than pure metals

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