Smart materials (AQA GCSE Design and Technology): Flashcards
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Practise the cards
15 cards from this deck
What are smart materials?
What are smart materials?
Materials that respond to external stimuli & change properties
Key characteristic of smart materials
Key characteristic of smart materials
Responsiveness to environmental triggers
What makes materials 'smart'?
What makes materials 'smart'?
Sense & respond automatically without human intervention
What are shape memory alloys?
What are shape memory alloys?
Metals that remember & return to original shape when heated
What is Nitinol made from?
What is Nitinol made from?
Nickel and titanium
Typical trigger temp for shape memory alloys
Typical trigger temp for shape memory alloys
Around 70°C
Shape memory alloy medical use example
Shape memory alloy medical use example
Tubes in arteries that expand to keep blood vessels open
Limitations of shape memory alloys
Limitations of shape memory alloys
Expensive, limited lifespan, slow response
What are thermochromic pigments?
What are thermochromic pigments?
Powder materials that change colour with temperature
Thermochromic colour change types
Thermochromic colour change types
Reversible or permanent
Thermochromic pigment application example
Thermochromic pigment application example
Baby bottles that change colour when too hot
What are photochromic materials?
What are photochromic materials?
Materials that change colour when exposed to UV light
Stimulus that triggers photochromic materials
Stimulus that triggers photochromic materials
Ultraviolet (UV) light/radiation
Photochromic material application example
Photochromic material application example
Transition lenses that darken in sunlight
Common limitation of smart materials
Common limitation of smart materials
Expensive to develop and manufacture