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PROPERTIES OF MATERIALS

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by

Cris Barral

on 14 October 2013

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Transcript of PROPERTIES OF MATERIALS

PROPERTIES OF MATERIALS
Thermal propierties
Thermal conducivity
Technological propierties
Mouldability
Electrical propierties
Electrical conductivity
Physical propierties
Density
Mechanical propierties
Elasticity
Malleability
Ductility
Hardness
Toughness
Is the ability of material to change its shape when we apply forces to it, and recover its original shape when the forces stop.
HOW?
Is the ability of a material to squeeze into a new shape when it is under compression forces, and to keep the new shape when the forces stop.
Is the ability of a material to strech into a new shape when it is under pulling forces, and then to keep the new shape when the forces stop.
Is the capacity to scratch other materials
The nail has got
hardness
Is the resistence that present a material
Is a relation between weight and volume.
Magnitude Symbol Unit












Density
Weight
Volume
D
W
V
Kg/l or g/cm3
Kilogram [Kg]
Litre [l]
Is the ability of a material to let electrons flow through it.
Is the ability to let heat flow throw the material
Extrudability
Is the ability of a material to fill a mould
Is the ability of a material to be pushed through a hole with the desired shape.
Ecological propierties
Toxicity
Is the capacity of a substance to damage an organism by ingestion, inhalation or skin contact. Some substances are not toxic, but they damage the atmosphere.
Curiosity
Long time ago, pipes was made with
lead, but in 1800 it discover that this material was
toxic
, and them, the pipes was made with iron.
Lead pipe
Iron pipe
Recyclability
Is the capacity of a material to be used again to make another object. This isn't a property of the material, it depends how we dispose of the object
PLAY
Recycle
Glass container
Organic container
Paper-cardboard
container
When we want the electricity to flow easily, we use
conducting materials
Cooper
When we don´t want the electricity to flow, we use
insulating materials
Plastic
Principal propierties of plastics:

-Light.
-Resistant to corrosion.
-Good mouldability.
-Low melting point.
-Degradable under ultraviolet light.
Windows made with PVC
Cristina Barral
3ºB
Made by:
Sensorial propierties
These propierties isn't depends only on the materials, depends on the person too.
-Colour
-Smell
-Flavor
-Texture
Full transcript