Hot Pressing
This forming technique is the simultaneous application of external
pressure and temperature to enhance densification. It is conducted
by placing either powder or a compacted preform into a suitable
die, typically graphite, and applying uniaxial pressure while
the entire system is held at an elevated temperature, e.g. 2000°C
for SiC.
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Hot Pressing is only suited to relatively simple shapes,
with the components usually requiring diamond grinding to
achieve the finished tolerances. |
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