Smart Materials Flashcards
1
Q
What is shape memory alloy?
A
Metal which once deformed will return to its original shape when heated above its transition temperature
2
Q
Uses of shape memory alloys
A
trigger sprinklers in fire alarm systems
controllers for hot water valves in shower/coffee machine
spectale frames
3
Q
Definition of viscoelastic material
A
Material which changes visocity depending upon the rate at which stress is applied
4
Q
Definition of piezoelectric material
A
Material which changes shape fractionally when voltage is applied to it
5
Q
Use of piezoelectric material
A
- Contact sensors for alarm systems
- microphones and loudspeakers
6
Q
Uses of thermochromic
A
- Plastic strips and colour changes to indicate temperature
7
Q
Waht si thermochromic
A
Changes colour with temperature
8
Q
Uses of photochromic
A
Changes colour with changes in the level of light
