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DT > 1.4 Smart And Composite Materials > Flashcards

1.4 Smart And Composite Materials Flashcards

1
Q

What are modern materials?

A

Existing materials that have been alerted to improve their properties.

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2
Q

What are smart materials?

A

Materials that respond to changes in that environment.

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3
Q

Name 7 smart/modern materials

A

Shape memory alloys
Reactive glass
Photochromic glass
Temperature responsive polymers
Conductive inks
Nanomaterials

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4
Q

What are SMAS? Where are they used?

A

They will return to original shape when heated.
Glasses frames
Tweezers
Medical stent

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5
Q

What is one advantage and two disadvantage of SMAS?

A

Expensive
Metal fatigue
Lengthy lifespan of product

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6
Q

What are nanomaterials? What are they used for?

A

Materials made up of tiny components
Sunscreen
Car bumpers

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7
Q

What is photochromic glass? What is it used for?

A

Darkens when exposed to light.
Sunglasses
Plane cockpit windows

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8
Q

Advantage and disadvantages of photochromic glass

A

Can undergo thousands of cycles without affecting performance
Maybe slow to react
User cannot control reaction

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9
Q

What is Reactive glass? Where is it used?

A

Changes from transparent to opaque when voltage is supplied
Welding masks
Windows

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10
Q

What are piezoelectric materials?

A

Generate small charge when compressed or reverse.
Used to generate electricity

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11
Q

What are temperature responsive polymers? Where are they used?

A

Materials that changed their physical properties with changes of temperature.
Biomedical applications

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12
Q

What is conductive ink? What is is used for?

A

Pigment that allows current to flow through.
Used for drawning circuits

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13
Q

What are Composite materials?

A

Materials that are made up of more than one existing material.

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14
Q

Name 5 composite materials

A

Concrete
Plywood
Fiberglass/carbon fiber
Reinforced polymers
Robotic materials

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15
Q

What are some advantages and disadvantage of concrete?

A

Excellent compressive strength
Can be molded into complex shapes
Good durability
Fire resistant
Maybe damaged by corrosion of reinforcement bars

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16
Q

What is concrete used for?

A

Construction

17
Q

What are some advantages and disadvantage of plywood?

A

High strength to weight ratio
High impact resistance
Plywood may come apart if exposed to water

18
Q

What is plywood used for?

A

Furniture
Flooring

19
Q

What are some advantages and disadvantage of carbon fiber/fiber glass?

A

Good durability
Lightweight
Excellent strength to weight ratio
Breathing carbon covers in may cause respiratory issues

20
Q

What are some uses carbon fiber and fiber glass?

A

GPR:
used for body of cars
Baths
Showers

CFRP:
Armor
Golf clubs

21
Q

What are some advantages and disadvantage of reinforced polymers?

A

Strong
Good insulator of heat
Good insulator of electricity
Expensive

22
Q

What are some advantages and disadvantages of robotic materials?

A

Can react to surroundings
Can react quickly
Expensive
Complex

23
Q

What are technical textiles?

A

Materials that are developed for function rather than appearance

24
Q

Name 7 technical textiles

A

Sports
Eco friendly
Protective
Geotextile
Domestic
Construction
Agrotextiles

25
Q

What are some advantages and disadvantage of agrotextiles?

A

Reduces need for pesticides
Can be cheap
May damage ecosystems
Is eco friendly

26
Q

Advantages and disadvantages of construction textiles

A

Strong
Light weight
Expensive
May degrade over time

27
Q

Advantages and disadvantages of Geotextiles

A

Do not rot
Cost effective
Deal well with water
Inefficiency when damaged
Is eco friendly

28
Q

Advantages and disadvantages of domestic textiles

A

Hard wearing
Stain resistance
Absorbent
Expensive
Flammable
(Eg- wipes, carpets)

29
Q

Advantages and disadvantages of protective textiles

A

Resistance to external factors
Breathable
Lightweight
Expensive
Not eco friendly

30
Q

Advantages and disadvantages of sports textiles

A

Lightweight
Breathable
Moisture resistant
Expensive
Not eco friendly

DT (17 decks)

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