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Engineering > Smart And High Performance Materials > Flashcards

Smart And High Performance Materials Flashcards

About materials, their properties, examples of use and improvements on traditional materials

1
Q

What are some properties of Zirconia?

A 
It is:
Low cost, 
Durable,
Perfectly Clear
and Looks like diamond
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2
Q

What is Zirconia used in?

A 
Examples include:
Abrasives (cutting blades) 
Refractory Material (used to bend light/lasers)
Decoration (on teeth)
Jewellery (like diamond)
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3
Q

Why is Zirconia used?

A 
It is:
Very hard
Clear
Colourless
Can be cut into diamond shape
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4
Q

How is Zirconia is an improvement on traditional materials?

A

It is cheaper than Diamond

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5
Q

Is Zirconia a Smart or High Performance Material?

A

It is a high performance material

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6
Q

What is Zirconia?

A

A ceramic

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7
Q

What are properties of Electrochromic materials?

A

They change colour when electricity is applied

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8
Q

What are Electrochromic materials used in?

A

Examples include:
Smart windows,
Electrochromic mirrors and display devices

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9
Q

Why are Electrochromic materials used?

A

They are used for privacy in office windows, automatic tinting depending on the sun

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10
Q

Why are Electrochromic materials better than traditional materials?

A

Usually you have to choose the colour of a material and it can’t be changed easily

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11
Q

Are Electrochromic materials smart materials or high performance materials?

A

It is a smart material.

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12
Q

What are properties of a shape memory alloy?

A

They are bendable, and will return to its original shape if heated above a certain temperature

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13
Q

What are shape memory alloys used in?

A

They are used in sprinklers in fire alarm systems, glasses frames, and coffee machines

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14
Q

Why are Shape memory alloys used?

A

They are easy to shape and keeps the shape

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15
Q

Why are Shape memory alloys better than traditional materials?

A

Glasses frames would have to be re-bent by hand but now heat can be used

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16
Q

Are shape memory alloys smart or high performance materials

A

They are smart materials

17
Q

What are properties of piezoelectric actuators?

A

When electricity is applied they change shape by a small amount. Can be stacked.

18
Q

What are piezoelectric actuators used in?

A

They are used in controlling hydraulic valves, adjusting machining tools and some motors.

19
Q

Why are piezoelectric actuators used?

A

They make very small and precise movements, and there are no motors and gears to go wrong.

20
Q

Why are piezoelectric actuators better than traditional materials?

A

Easy to control pumps and valves. Small and controlled movement, unlike motors

21
Q

Are piezoelectric actuators smart or high performance materials?

A

They are a smart material

22
Q

What are some properties of nickel based super alloys?

A

They are
Lightweight
Strong at high temperatures
Corrosion resistant

23
Q

What are nickel based super alloys used in?

A

Aircraft engine parts,
Power Station turbine parts
Casting dies

24
Q

Why are nickel based super alloys used?

A

When spinning at high speed and temperatures, it won’t break even when wet

25
Q

Why are nickel based super alloys better than traditional materials?

A

Stronger than titanium and steel (at high temperatures) and lighter than steel

26
Q

Are nickel based super alloys a smart material or a high performance material?

A

They are high performance materials

27
Q

What are some properties of cobalt based super alloys?

A

Lightweight and Corrosion resistant
Strong at EXTREMELY HIGH TEMPERATURES

It was necessary to shout

28
Q

What are cobalt-based superalloys used in?

A

High temperature turbine parts

aerospace/power stations

29
Q

Why are cobalt-based superalloys used?

A

When spinning at high speed and extreme temperatures it won’t even break when wet

Basically the best boi going

30
Q

Why are cobalt based super alloys better than traditional materials?

A

Stronger than titanium (and even nickel - based alloys) even at EXTREME temperatures

31
Q

Are cobalt based super alloys a smart material or a high performance material?

A

High performance materials

32
Q

What are some properties of Titanium?

A

Lightweight,
Strong
Ductile (can be made long lengths)

33
Q

What is Titanium used in?

A

Aerospace - Aircraft landing gears

Biomedical - Hip replacements

34
Q

Why is titanium used?

A

Light in weight, high in strength.

good strength to weight ratio

35
Q

Why is Titanium better than traditional materials?

A

Steel is heavier, Aluminium isn’t as strong

36
Q

Is titanium a superalloy?

A

No - It’s a metal because it’s an element and not an alloy.

37
Q

Is Titanium a smart or high-performance material?

A

It’s a high -performance material

Engineering (1 decks)

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