Smart Materials

Question 1

describe titanium

Answer 1

extremely corrosion resistant metal , high strength to weight ratio , expensive and used in air and spacecraft , dental implants , bone replacements bikes

Question 2

shape memory alloys

Answer 2

they remember their original shape , they can return to original shape when heated above a certain temperature
For example nitinol - glasses frame , if it bends it can be heated in water to return to shape

Question 3

photochromic pigments

Answer 3

they change colour in response to light for example sunglasses that change colour when its sunny

Question 4

Thermochromic pigments -

Answer 4

when temperature changes the colour changes , for example baby spoons for the right temp food - (‘not too hot)

Question 5

what is a datum reference point

Answer 5

When marking out an object, they’re used as a reference point for all measurements to be taken from and can be chosen . By taking measurements from a small number of set points, accuracy can be improved
a single datum point, often found in the corner of a design. In a circular shape, it would be around the edge or from the centre.
For example using dotted construction lines to find the centre of a square