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DT > Chapter 3-materials > Flashcards

Chapter 3-materials Flashcards

1
Q

How cool is graphene?

A

Harder than diamond, stronger than steel
One atom thick
The lightest, strongest,thinnest best heat electrical conductor ever made
has a future in phone screens,solar panels, water filter,smaller batteries that hold longer charge.

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2
Q

How cool is Kevlar?

A 
Properties- 
High strength:weight ratio 
High chemical resistance 
High toughness 
High cut resistance 
Flame resistance and self extinguishing

Body armour.

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3
Q

Woods

Cedar

A

-water resistance
Moth repellant
Knotty
Used for lining draws, chests, boxes, sheds

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4
Q

Spruce

A 
Strong 
Hard 
Low resistance to decay 
Lightweight 
Long and tall! That why it's used for....
Ship masts, spars on ships. Ladders
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5
Q

Mahogany

A

Strong
Pore structure
Excellent carving wood
F

Furniture

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6
Q

Yew

A

Elastic
Heavy, firm, hard
Peeled and sliced

Bows

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7
Q

Metal joining methods

A

Brazing: bonding by melting a filler
Welding:two pieces are put together with melted metal
Soldering: a type of brazing which works at lower temps

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8
Q

Regenerated materials

A

MDF, block board, chipboard, card

Viscose

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9
Q

Methods of producing materials with other specific materials

To add more characteristics to the material than it would have individually

A

Compositing: to make a composite of

Reforming:melting down

Alloying

Laminating: to construct from layers of material bonded together

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10
Q

Name some hardwoods:
Evergreen (3)
Desiduous (4)

A

Mahogany
Teak
Balsa

D-oak
D-beech
D-birch
D-Ash

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11
Q

Name some softwoods

A 
Yew 
Spruce 
Cedar 
Pine 
Fir
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12
Q

LDPE

A

Thermoplastic
Chemical resistance
Flexible

Packaging(bottles,bags,boxes)

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13
Q

Polyester resin

A

Thermoset
Stiff, hard, brittle,unless,laminated
Electrical insulator

Bonding, casting, encapsulating

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14
Q

Polypropylene

A

Light, hard, chemical resistant
Thermoplastic
Scratches easily
Resists work fatigue

Medical and lab equipment
Plastics seats

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15
Q

Polystyrene

A

Thermoplastic
Light, stiff, hard, brittle
Good water resistant

Containers, boxes
Used for vacuum forming.

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16
Q

Ptfe

A

Thermoset
Slippery
Unreactive

Used for non stick frying pans, pipes, chemical containers

17
Q

Nylon

A

Self lubricating
Chemical resistant
Tough

Clothing and floating rope

18
Q

Melamine formaldehyde

A

I thermoset
Hard strong stuff
Resists some stains and chemicals well

Used for laminated work tops, and electrical insulation

19
Q

Pvc

A

Thermoplastic
Easy to mound
Stiff strong, tough

May used for vacuum forming
2d/3D shapes

20
Q

Name thermosets and properties

A 
Pte 
Epoxy resin 
Cellophane 
Urea formaldehyde 
Properties can only be heated then shaped once
21
Q

Cellophane

A

Transparent
Lightweight
Non flammable
Wrapping products

22
Q

HDPE

A

Hard stuff
Able to be sterilised
Plastic bottle, tubing, household equipment

23
Q

Epoxy resin

A

Hard brittle unless reinforced
Good chemical resistance

Adhesives, bonding, casting, encapsulate

24
Q

Acrylic

A

Thermoplastic
Machine able
Polishes well
Scratches easy

Signs, wash basins, baths

25
Q

Name thermoplastics and its property’s

A 
Nylon 
Acrylic
Polypropylene 
Polystyrene 
LDPE 
HDPE 
PVC 
thermoplastics can be heated and shaped many times
26
Q

Teak

A

Hard.evergreen

Durable to moisture
Doesn’t corrode iron and steel fittings

Ship decks and garden furniture

27
Q

Oak

A

Very strong
Withstands wear and shocks
Attractive

Gates, garden furniture, furniture

28
Q

Fibres

A

Modern microfibres
Elastane (Lycra) sport ware, crease resistant

Fibre blends
Polyester/cotton blend (easy care and crease resistant) shirts

Microfibres
Primaloft thermal insulation replacement for sleeping bags

29
Q

Low carbon steel

A

Ferrous
Most common form of steel
Rusts easily
Used for girders (big metal structures)

30
Q

Copper

A 
Non ferrous 
Good electrical/thermal 
corrosion resistant 
Easily joined and alloyed 
Cables, sausage base
31
Q

Pewter

A

Non ferrous
Alloy(mostly tin)
Similar looks to silver

Used for kitchen ware
Not good for cooking this it’s has low melting point
Decorative purposes only

32
Q

Stainless steel

A

Ferrous
Alloy steel and chromium
Doesn’t readily stain, rust, or corrode with water.

Used for cutlery, springs, saucepans
Although more resistant it is not as strong as carbon steel

33
Q

Composite materials

A

“A combination of materials and a suitable bonding agent.
Particle based:
Concrete (sand and stone chipping X and cement)

Fibre reinforced composite :

Fibre glass (resin and fibre glass fibres)

Carbon fibre(resin and carbon fibre)

34
Q

Hard woods and softwood

Coniferous and deciduous

A

Soft woods are conferous

Hardwoods are deciduous

35
Q

General plastic properties

A 
Good insulators 
Lightweight 
Self coloured 
Generally has good atmospherically and chemical corrosion resistance  
Strength:we it ratio is good.

DT (5 decks)

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