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Method for filling local uneven tiny gaps after ceramic matrix composite product is assembled

A filling method and post-assembly technology, which is applied in the field of filling local uneven and small gaps after assembly of ceramic matrix composite products, which can solve the problems of local unevenness and achieve excellent product performance, low expansion coefficient, and excellent filling performance.

Pending Publication Date: 2021-02-12
XIAN XINGUI CERAMIC COMPOSITE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems in the prior art that there are local uneven and tiny gaps after the assembly of ceramic matrix composite products, and the ceramic matrix composite itself is a surface microporous material, and the gaps have a certain influence on the performance of the product In order to solve the problem, a method for filling local uneven micro gaps after assembly of ceramic matrix composite products is provided.

Method used

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  • Method for filling local uneven tiny gaps after ceramic matrix composite product is assembled
  • Method for filling local uneven tiny gaps after ceramic matrix composite product is assembled
  • Method for filling local uneven tiny gaps after ceramic matrix composite product is assembled

Examples

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Effect test

Embodiment 1

[0040] This example is the filling of local uneven and small gaps after the assembly of the first-stage high-pressure guide vane product of a certain type of aero-engine. The specific steps are as follows:

[0041] 1) Select the product after chemical vapor deposition after assembly, polish and clean the surface of the product, remove burrs and scum, and perform ultrasonic cleaning and drying;

[0042] 2) Take boron carbide powder and borosilicate glass powder, mix them according to the mass ratio of 1:9 and stir evenly to obtain filling powder;

[0043] 3) Use a micro-pipette to pour the filling powder into the gap at the tip of the blade tail, and vibrate while filling until the gap is filled with the filling powder;

[0044] 4) Take epoxy resin glue and diluent, mix according to the mass ratio of 10:3, and stir until uniform without air bubbles to obtain glue, and the diluent is industrial ethanol;

[0045] 5) Use a disposable needle tube to pour the glue into the gap afte...

Embodiment 2

[0052] This embodiment is for the filling of local uneven and small gaps after assembly of high-pressure guide vane products of aero-engines. The specific steps are as follows:

[0053] 1) Select the product after chemical vapor deposition after assembly, polish and clean the surface of the product, remove burrs and scum, and perform ultrasonic cleaning and drying;

[0054] 2) Take boron carbide powder and borosilicate glass powder, mix them according to the mass ratio of 1:7 and stir evenly to obtain filling powder;

[0055] 3) Use a micro-pipette to pour the filling powder into the gap around the flow column of the blade, and vibrate while filling until the gap is filled with the filling powder;

[0056] 4) Take epoxy resin glue and diluent, mix according to the mass ratio of 10:4, and stir until uniform without bubbles to obtain glue, and the diluent is industrial ethanol;

[0057] 5) Use a disposable needle tube to pour the glue into the gap after filling, and use the cap...

Embodiment 3

[0064] This example is the filling of local uneven and small gaps after the assembly of composite material inlet products of a certain type of aircraft. The specific steps are as follows:

[0065] 1) Select the product after chemical vapor deposition after composite material assembly (no metal parts and heat insulation installation), polish and clean the surface of the product, remove burrs and scum, and perform ultrasonic cleaning and drying;

[0066] 2) Take boron carbide powder and borosilicate glass powder, mix them according to the mass ratio of 1:8 and stir evenly to obtain filling powder;

[0067] 3) Use a micro-pipette to pour the filling powder into the gap between the product flow channel and the skin, and tap the gap with a rubber hammer to perform auxiliary mechanical vibration while filling, until the gap is filled with filling powder;

[0068] 4) Take epoxy resin glue and diluent, mix according to the mass ratio of 10:5, and stir until uniform without air bubbles...

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Abstract

The invention relates to a method for filling local uneven tiny gaps after assembly of a ceramic matrix composite product, and aims to solve the problem that the local uneven tiny gaps influence various performances of the product in the prior art. The method comprises the following steps: 1) grinding and polishing the surface of a product, cleaning and drying; 2) filling local uneven tiny gaps ofthe assembled product with filling powder, wherein the filling powder comprises borosilicate glass powder; 3) taking epoxy resin glue and a diluent, mixing according to a mass ratio of 10:(2-5), andstirring until the mixture is uniform and free of bubbles to obtain a glue solution; (4) sealing and filling the filled gaps with glue liquid; 5) drying and curing the encapsulated product at the temperature of between 150 and 180 DEG C for 0.5 to 1 hour; and (6) subjecting the dried and cured product to high-temperature vacuum sintering for 7-9 hours at the sintering temperature of 950-1200 DEG C, conducting natural cooling after heat preservation is conducted for 5-6 hours, adoptinginert gas shielding in the heat preservation and cooling process, taking out the product after the temperatureis lowered to the room temperature, and completing filling.

Description

technical field [0001] The invention relates to a method for filling local uneven tiny gaps after assembly of ceramic matrix composite products. Background technique [0002] Ceramic matrix composite material (ceramic matrix composite material) is a new thermal structure / functional integrated material with the advantages of metal materials, ceramic materials and carbon materials. It has high temperature resistance, low density, high specific strength, high specific modulus , anti-oxidation, anti-ablation, insensitive to cracks, and no catastrophic damage, etc., it has been widely used in satellite optics, aviation, aerospace, nuclear energy, photovoltaics and other fields. Ceramic matrix composite products are generally assembled from individual parts of different shapes. Due to the stress release and deformation of the parts in the high-temperature vacuum environment during the chemical vapor deposition process, or the uneven surface of the fiber fabric, or the phenomenon o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/87
CPCC04B41/87C04B41/5058C04B41/5022C04B41/4576C04B41/0072
Inventor 张少博张建平张杰张伟强宋海龙马文科赵晖
Owner XIAN XINGUI CERAMIC COMPOSITE MATERIAL CO LTD