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Gcse technology > modern material > Flashcards

modern material Flashcards

1
Q

what is graphene

A

two dimentional layer of carbon. harder than diamond, 300 time stroner than steel and is currently the lightest known material

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2
Q

properties of graphene

A

light weight
transparent
flexible
tough
very good conductor of electrisity

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3
Q

uses of graphene

A

solar powered phones and water filtes

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4
Q

what is metal foam

A

metal foam is produce by injecting gas into metal when its in a molten state

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5
Q

what are the properties of metal foam

A

very lightweight
high compressive strength
porus
exellent energy absorbing properties

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6
Q

uses of metal foam

A

soundproofing in cars

crashprotection saften feature

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7
Q

what is titanium

A

a relativley new metal

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8
Q

what are the properties of titanium

A

high strength to density ratio
excellent resistance to corrosion

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9
Q

what are the uses of titanium

A

surgical instements and rplacment body parts such as hip joints

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10
Q

what is liquid crystal display (LCD)

A

laminate of two layers of glass with a liquid crystal core

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11
Q

what are properties of LCD

A

ooaque when an electrical current is applied to the liquid crystal core

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12
Q

what are usces of (LCD)

A

flat screen TVs

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13
Q

what are nano materials

A

nano materials ar very small: one billionth of a metre in size. they are added to other materials to improve their properties

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14
Q

what are properties of nano materials

A

can be coated onto glass to make it ‘self cleaning’

can be added to sports equpment to make it lighter and stronger

antibacterial qualities

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15
Q

uses of nano materials

A

glass
sports equipment
antibacterial socks

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16
Q

what is polytetrafluorthylene (PTFE)

A

a non stick coating aplied to surfaces to make them slipery

17
Q

properties of PTFE

A

Non-stick

18
Q

uses of PTFE

A

non stick kitchen utensils and pans

19
Q

what are corn starch polymers

A

made from polyactic acid that is found in potatoes corn and maze it is an alternative to oil based polymers

20
Q

properties of corn starch polymers

A

reneqble
biodegradable

21
Q

uses of cornstarch polymers

A

disposable cutlery and food packaging

22
Q

what is anodised aluminium

A

coating applied to aluminium by an electrolytic process

23
Q

properties of anodise aluminium

A

harens the surface of aluminium. can be dyed to change the apearance of aluminium

24
Q

uses of anodised aluminium

A

sports drinks bottles
components for climing equipment
mountain bikes

25
Q

what is nickel plating

A

a coating applied to metal by an elecrolytic process

26
Q

what are properties of nickel plating

A

prevents corrosion and wear of the base metal

27
Q

uses of nickel plating

A

door handles, belt buckles, nuts and bolts

28
Q

what is polymer-coated steel

A

a coating of a thermoforming polumer applied to hot metal

29
Q

properties of polymer-coated steel

A

prevents corrosion and alter the appearnace of the base metal

30
Q

uses of polymer-coated steel

A

tool handles

31
Q

whats a smart material

A

a materia that reacts to the enviromental changes such as heat and light

32
Q

what are shape memory alloys (SMAs)

A

a metal that will return to its original shape when placed in hot water or heated

33
Q

whats a thermmochromatic material

A

a meterial that reacts to heat for example a baby spoon that changes colour pigment when its to hot

34
Q

whats a photochromic material

A

a material that reacts to light for example sunlasses that change pigment based on light intensity

Gcse technology (7 decks)

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