Abstract:
The infiltration kinetics of the metal melt into a fibrous
preform in centrifugal accelerating field is analyzed on the
basis of Darcy's law and the assumption that the fibrous preform
is treated as "bundle of capillaries". The critical rotating
speed is analyzed with the established model. The influences of
the metal mass, the rotating speed of the equipment, the casting
height, the original outer radius of the metal melt and the
fibrous volume fraction in fibrous preform on infiltration are
studied. The result show that the critical rotating speed is
dependent on critical pressure, casting height, metal melt mass
and the character of fibrous preform. With the increase in the
metal melt mass, rotating speed of the equipment and original
outer radius of the metal melt, or the decrease in casting height
and fibrous volume fraction in fibrous of the metal melt, or the
decrease in casting height and fibrous volume fraction in
fibrous preform, infiltration of metal melt for fibrous preform
becomes easier.
Key words:
Centrifugal accelerating field Metal melt Fiber Infiltration
kinetics Metal matrix composite
* This project is supported by National Natural Science Foundation of
China (No.59771055).
Manuscript received on November 6, 2000; revised manuscript April 23, 2001
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