unit 5 composite materials Flashcards
mechanical properties
tensile and compressive strength
stiffness and toughness
plasticity and elasticity
ductility and malleability
physical properties
mass,wieght,volume
density and harness
electrical and thermal conductivity
what is tungsten carbide
composite material
made from ceramic and metal
hard, rigid,impact resistant
used in high speed cutting tools
carbon fiber
lightweight, high tensile strength
corrosion/chemical resistant
stable in hot conditions
used in racing cars
grp
strong in tension
little compressive strength
lightweight
uv/corrosion/water resistant
aluminium composite boards
easy to cut
stable, durable,lightweight
range of colours, wont wrap/wrinkle
used in wall panels
fiber cement
was made from cement, asbestos
now made from cellulose and synthetic fibres
lightweight,durable,weather/chemical/rust resistant
used in cladding
concreate
made from air, cement,water,sand,gravel
heavy, high compressive strength,cheap
used in buildings
steel reinforced concrete
used in high rise buildings, bridges and multi story car parks
smart material
one or more properties that is dramatically altered by an external stimulus
shape memory alloys
programmed to remember specific shape at certain temperature
expensive
weather/temp/electrical current stimuli
thermochromic pigment
changes colour/opoacity with change in temp
temp stimuli
phosphorescent pigment
glow in the dark
material absorbs energy from light and emits light in the dark
used in toys paints stickers
light stimuli
photochromic pigment
smart material that changed colour/opacity with uv light in a reversible reaction
used in spectacles, clothing
light stimuli
electroluminescent wire
copper wire coated in phosphor glows when alternative current is applied
flexible, can be used outdoors
used in lighting,bikes,vechicles
electrical current stimuli
