| 摘要 |
Mask ( 10, 10', 21, 22, 30 ) for use in coating a carbon-carbon composite brake disc ( 25 ) with anti-oxidant. The mask is composed of carbon-carbon composite material or nonreactive ceramic material. The mask is configured with edge ridges ( 11, 13, 34, 36 ) that are aligned with the outer and inner annular diameters of the carbon-carbon composite brake disc, a gas flow channel ( 12, 32 ) between the ridges, and a gas access port ( 18, 40 ) that allows gas to enter the gas flow channel. The mask may also include a gas exit port ( 16 ) having a valve ( 17 ) operatively connected thereto, so that gas flow may be restricted when pressure within the mask and carbon-carbon composite brake disc falls below a specified minimum value. Also, a method of avoiding application of liquid antioxidant material to a friction surface of a carbon-carbon composite brake disc, by: covering the friction surface with a mask configured to deliver compressed gas to the friction surface, and directing compressed gas across the friction surface and through pores in the carbon-carbon composite brake disc and/or in the mask while the masked brake disc is in the presence of the antioxidant material in a liquid state.
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