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A kind of ceramic matrix composite heat-resistant plate and preparation method thereof

A composite material and heat-resistant plate technology, applied in the field of heat-resistant plates, can solve the problems of the strength reduction of metal support structures and other structural systems, the easy entry of flames into through holes, and the heat transfer of screws or bolts. The effect of slow heat rate and reduced thermal conductivity

Active Publication Date: 2022-07-15
GONG YI VAN-RES INNOVATION COMPOSITE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned connection methods between the existing heat-resistant plate and the back metal support structure, there are problems such as the easy failure of the connector at high temperature, the heat transfer of screws or bolts, and the easy entry of through holes into flames, which will cause the strength of the metal support structure and other structural systems to decrease or fail. The invention provides a ceramic matrix composite material heat-resistant plate, which perfectly solves the problems of the prior art

Method used

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  • A kind of ceramic matrix composite heat-resistant plate and preparation method thereof

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Effect test

Embodiment 1

[0053] A ceramic matrix composite heat-resistant plate, the heat-resistant plate is provided with a through hole, the through-hole is an inverted convex shape, that is, the through-hole includes two parts, the first part is the part with a large diameter near the front of the heat-resistant plate , The second part is a part with a small diameter close to the back of the heat-resistant plate; a bolt is pierced through the through hole, and the head of the bolt is an inverted convex shape consistent with the shape and size of the through hole; The screw penetrates through the through hole; the gap between the through hole and the bolt is filled with a ceramic matrix made of nanofiber-containing ceramic precursor slurry.

[0054] The preparation method of the above-mentioned ceramic matrix composite heat-resistant plate, the preparation method comprises the following steps:

[0055] (1) Preparation of preforms: The heat-resistant board fiber preforms and bolt fiber preforms were ...

Embodiment 2

[0070]A ceramic matrix composite heat-resistant plate, the heat-resistant plate is provided with a through hole, the through-hole is an inverted convex shape, that is, the through-hole includes two parts, the first part is the part with a large diameter near the front of the heat-resistant plate , The second part is a small diameter part close to the back of the heat-resistant plate; the through hole is provided with a bolt; the screw rod of the bolt passes through the through hole; the head of the bolt sinks, that is, the surface of the head of the bolt There is a distance of 2mm from the front surface of the heat-resistant plate; the head of the bolt is in the same shape as the through hole, the diameter of the head is the same as the inner diameter of the through hole, and the length of the head is less than the length of the through hole by 2mm. The gap between the gaps is filled with a ceramic matrix made of nanofiber-containing ceramic precursor slurry; the space between ...

Embodiment 3

[0090] A ceramic matrix composite heat-resistant plate, the heat-resistant plate is provided with a through hole, the through-hole is an inverted convex shape, that is, the through-hole includes two parts, the first part is the part with a large diameter near the front of the heat-resistant plate , The second part is a small diameter part close to the back of the heat-resistant plate; the through hole is provided with a bolt; the screw rod of the bolt passes through the through hole; the head of the bolt sinks, that is, the surface of the head of the bolt There is a distance of 4mm from the front surface of the heat-resistant plate; the shape of the head of the bolt is the same as that of the first part of the through hole, the diameter of the head is the same as the inner diameter of the first part, the length of the head is 4mm less than the length of the first part, and the screw of the bolt The diameter is the same as the inner diameter of the second part; the gap between t...

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Abstract

The invention relates to a ceramic matrix composite heat-resistant board and a preparation method thereof. (1) Prepare a fiber preform according to design; (2) Prepare an interface layer; (3) Repeat dipping-curing-cracking 2-6 times; (4) ) Process the heat-resistant plate product through holes according to the design size, and process the head of the bolt and the external thread of the screw according to the design size; (5) Apply the ceramic precursor slurry containing nanofibers on the surface of the bolt and the through hole, The bolts pass through the through holes of the heat-resistant plate; (6) Repeat the dipping-curing-low temperature cracking 2-4 times, and then repeat the dipping-curing-high temperature cracking 1-2 times; (7) CVI technology densifies the SiC matrix; (8) ) CVD deposition of SiC coating to obtain ceramic matrix composite heat-resistant plate. The heat-resistant plate produced by the invention is resistant to high temperature, can effectively prevent the engine tail flame from entering the back of the heat-resistant plate from the gap to ablate the metal bracket, prolong the service life of the metal bracket and reduce the use cost.

Description

technical field [0001] The invention belongs to the technical field of heat-resistant plates, and in particular relates to a ceramic-based composite material heat-resistant plate suitable for high temperature, high speed and high pressure airflow erosion protection and a preparation method thereof. Background technique [0002] The heat-resistant plate deflects the exhaust flame of the engine by cooperating with the metal lifting platform. The connection between the existing heat-resistant plate and the back metal support structure mostly adopts the method of setting through holes in the heat-resistant plate and using screws or bolts to connect with the back metal support structure. This connection method has high connection strength, but the high temperature resistance of the used superalloy screws or bolts cannot meet the actual use requirements, resulting in the failure of the connection between the heat-resistant plate and the metal lifting platform, increasing the number...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/80C04B35/84C04B35/628C04B41/87
CPCC04B35/62873C04B41/87C04B41/009C04B41/5059C04B2235/5248C04B2235/5244C04B2235/483C04B2235/486C04B2235/3804C04B2235/3873C04B2235/3839C04B2235/3886C04B2235/3813C04B2235/524C04B2235/5288C04B2235/77C04B2235/96C04B35/806C04B41/4531
Inventor 张东生马美霞吴恒魏庆渤刘毫毫曹伟李江涛潘广镇董会娜
Owner GONG YI VAN-RES INNOVATION COMPOSITE MATERIAL CO LTD
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