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
What are some advantages and disadvantage of agrotextiles?
Reduces need for pesticides Can be cheap May damage ecosystems Is eco friendly
26
Advantages and disadvantages of construction textiles
Strong Light weight Expensive May degrade over time
27
Advantages and disadvantages of Geotextiles
Do not rot Cost effective Deal well with water Inefficiency when damaged Is eco friendly
28
Advantages and disadvantages of domestic textiles
Hard wearing Stain resistance Absorbent Expensive Flammable (Eg- wipes, carpets)
29
Advantages and disadvantages of protective textiles
Resistance to external factors Breathable Lightweight Expensive Not eco friendly
30
Advantages and disadvantages of sports textiles
Lightweight Breathable Moisture resistant Expensive Not eco friendly