Carbon-carbon parts having filamentized fiber substrates and method of producing same
A composite substrate, chemical fiber technology, applied in chemical instruments and methods, fiber processing, non-woven fabrics, etc., can solve the problems of expensive carbon-carbon parts, increase the cost of finished parts, and cannot be reused, etc., to reduce Effects of time, improved workability, cost reduction
Inactive Publication Date: 2000-07-19
赛特技术有限公司
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Problems solved by technology
Third, the addition of chemicals or material additives to the preform to enhance handling properties is difficult due to the nature of this additive process since the additive may only be present in the compaction step added to the billet
Fourth, any material that is removed during the forming and die-cutting process cannot be reused, as there has been no way to return these scraps to the preform manufacturing process
[0007] In none of these conventional materials for the production of carbon-carbon parts it is possible to eliminate the batch carbonization step which increases the cost of the finished part
Furthermore, none of the conventional materials provide sufficient surface area to make it possible to achieve effective enrichment rates during CVD processing
Conventional materials cannot provide a method to recycle the leftovers of the base material and reuse them in blank processing
Therefore, conventional carbon-carbon parts are too expensive to be used in most conventional industrial applications
Method used
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[0044] Figure 7A schematic diagram illustrating a second method 160 of producing a composite preform from an FC substrate. First, a number of FC substrates 162 may be fed to a part cutter 164 that cuts the substrates into a desired shape. For the desired thickness of the preform, a substantial stack of cut FC substrates is fed into a press 166 which compresses the stacks of FC substrates together to form a consolidated preform 168, which can then be The compacted blank is densified by CVD. any one is shown in Figure 6 and 7 The methods in both can be used alone or as a combined method to form a preform that is later densified, but it is best to needlepunch the FC substrate before compression because the interlaminar strength of the needlepunched preform is determined Increased.
[0045] The compression time of any embodiment of the PAN-based substrate during the compression operation may be 2 to 20 minutes, preferably about 7 minutes. The compression temperature may be...
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Abstract
A method of producing a carbon-carbon part having a filamentized composite fiber substrate is provided. A substrate having a plurality of discontinuous filamentized fibers and a binder that binds said filaments together to form a composite substrate is provided, and carbon atoms are deposited onto the filaments at a predetermined temperature so that the binder is removed completely from the filaments and replaced with carbon atoms to from a dense carbon-carbon part.
Description
Background of the invention [0001] The present invention generally relates to carbon-carbon substrates and methods of making parts using the substrates. In particular, the present invention relates to filamentized composite fiber substrates and methods of making carbon-carbon parts using the substrates. [0002] Brake pads for aircraft or automobiles require materials with high heat resistance and long-term wear resistance. For some applications, asbestos is used because of its high resistance to heat. In addition to asbestos, carbon can also be used, although conventional carbon-to-carbon brake products are expensive and have historically been limited to aerospace or automotive racing applications. [0003] In general, substrates of carbon fibers or carbon precursors can be used to produce conventional carbon-carbon parts with sufficiently high heat resistance values, eg for aircraft braking systems. These conventional parts require complex and time-consuming machining proc...
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IPC IPC(8): C04B41/83C04B35/83D04H1/42D04H1/46D04H1/58D06M11/76D06M13/02F16D69/02
CPCY10S264/913C04B35/83F16D69/023Y10T428/2918Y10T428/30B32B9/00
Inventor W·泰斯D·E·万托克J·J·罗瑟M·T·乔特
Owner 赛特技术有限公司