Silicon carbide tube and microwave pyrolysis device

Abstract

The invention discloses a silicon carbide tube and a device for preparing pyrolytic carbon under microwaves. The silicon carbide tube comprises a heat-insulating core layer, a first silicon carbide layer, a channel layer, a second silicon carbide layer and a heat-insulating layer in a direction from a central axis of the tube to the outer wall of the tube, wherein the first silicon carbide layer is arranged on the surface of the heat-insulating core layer in a sleeving way; the heat-insulating layer is arranged on the surface of the second silicon carbide layer in a sleeving way. The device for preparing pyrolytic carbon under microwaves comprises a microwave heating cavity and a microwave generating system, wherein the microwave generating system is used for heating the microwave heating cavity; a pyrolytic carbon pyrolysis system is arranged in the microwave heating cavity; the pyrolysis system comprises a pyrolysis tube for depositing the pyrolytic carbon; the pyrolysis tube is the silicon carbide tube disclosed by the invention. By adopting the silicon carbide tube, a carbon source introduced into the channel can be heated uniformly rapidly. The pyrolytic carbon prepared by the device for preparing pyrolytic carbon under microwaves is uniform in organization structure, and is microcosmically controllable, so that the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of microwave chemical vapor deposition (MCVD) and microwave chemical vapor infiltration (MCVI) devices, and in particular relates to a silicon carbide tube and a microwave pyrolysis carbon preparation device. Background technique [0002] Carbon / carbon composite (C / C) is a new type of composite material with unique properties. Its friction and wear performance is the key to its use as an aircraft brake material, and the structure of matrix carbon plays a decisive role in its friction characteristics. The matrix carbon of carbon / carbon composite materials includes pyrolytic carbon (CVD carbon) obtained by chemical vapor deposition, resin carbon and pitch carbon obtained by liquid phase impregnation, and pyrolytic carbon and impregnated carbon obtained by mixing process. Abroad At present, most companies that produce carbon brake discs use pyrolytic carbon as the matrix carbon. According to different CVD proce...

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, to provide a silicon carbide tube and a microwave pyrolytic carbon preparation device containing the silicon carbide tube, so as to solve the cracking rate of the existing pyrolytic carbon preparation equipment during pyrolysis Slow, uneven heating leads to uneven tissue structure, microscopic uncontrollable problems, etc.

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