This friction
material is used in aircraft braking systems and
in motor-racing activity (Formula 1, Motorcycle
Grand Prix) because of its low weight and capacity
to absorb heat (an aircraft's brake is called a
"heat sink").
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Atelier composite
carbone/carbone |
This material is
a composite. It is made with fibres that give toughness
and a Carbon matrix that provides it with its friction
property. This material has a density of 1.8 compare
with that of 7.85 for steel.
The fibre is place in a mould and compressed to
produce a shape ready for densification. |
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The fibrons shape
is placed in a furnace at 1000°C. A gas is introduced
in the furnace and releases carbon that deposits
around the fibres.
After 500 to 800 hours, the compound is completely
dense. It can then undergo thermal treatments. It
is machined to final dimensions.
Both disc and brake pads are made with carbon/carbon.
Carbon/carbon composite can support temperatures
of up to 1600°C temperature use without deterioration.
The carbon/carbon friction level is not better than
that of the sintered material one, but is stable
at very high temperatures. |
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THE
TECHNOLOGY
