Forming method of fiber-reinforced silicon dioxide ceramic composite material

A ceramic composite material and fiber-reinforced technology, which is applied to ceramic molding machines, unloading devices, manufacturing tools, etc., can solve the problems of affecting the performance of composite materials, wasting manpower and material resources, and slow glue flow out, so as to achieve low cost and reduce impact , Improving the effect of impregnation efficiency

Pending Publication Date: 2021-12-14
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the molding process, it is necessary to close the mold and demould many times, and the ceramic body is taken out and placed in a vacuum oven for drying, which wastes manpower and material resources; Slow flow from the inside of the fabric, resulting in density gradients in different regions, affecting the properties of the composite

Method used

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  • Forming method of fiber-reinforced silicon dioxide ceramic composite material
  • Forming method of fiber-reinforced silicon dioxide ceramic composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] S1. Fiber preform pretreatment: the fiber preform is placed in a muffle furnace, heated to 500° C. for pretreatment, and the pretreatment time is 2 hours to obtain a fiber preform from which the sizing agent has been removed.

[0035] S2. Mold closing: place the fiber prefabricated body in the tank body of the vacuum impregnation-drying integrated molding device, connect each component to the tank body, turn on the vacuum pump, and remove the air inside the tank body.

[0036] S3. Impregnation-drying: inject silica sol into the tank, keep it for 20 hours, open the upper and lower valves of the tank, discharge all the sol inside the tank, set the temperature control program, and make the tank rise at a rate of 3°C / min Raise the temperature to 180°C and keep it warm for 20 hours to dry the fiber-reinforced ceramic flat body.

[0037] S4. Densification: Repeat the dipping-drying process 8 times to uniformly densify the fiber-reinforced ceramic flat plate.

[0038] S5, dem...

Embodiment 2

[0041]S1. Fiber preform pretreatment: the fiber preform is placed in a muffle furnace, heated to 600° C. for pretreatment, and the pretreatment time is 0.5 h to obtain a fiber preform from which the sizing agent has been removed.

[0042] S2. Mold closing: place the fiber prefabricated body in the drying tank body of the vacuum impregnation-drying integrated molding device, connect each component to the tank body, turn on the vacuum pump, and remove the air inside the tank body.

[0043] S3. Impregnation-drying: inject aluminum sol into the tank, keep it for 24 hours, open the upper and lower valves of the tank, discharge all the sol inside the tank, set the temperature control program, and make the tank heat up at a rate of 5°C / min Raise the temperature to 200°C and keep it warm for 18 hours to dry the fiber-reinforced ceramic flat body.

[0044] S4. Densification: Repeat the dipping-drying process 7 times to uniformly densify the fiber-reinforced ceramic flat plate.

[0045...

Embodiment 3

[0048] S1. Fiber preform pretreatment: the fiber preform is placed in a muffle furnace, heated to 400° C. for pretreatment, and the pretreatment time is 1 hour to obtain a fiber preform from which the sizing agent has been removed.

[0049] S2. Mold closing: place the fiber prefabricated body in the tank body of the vacuum impregnation-drying integrated molding device, connect each component to the tank body, turn on the vacuum pump, and remove the air inside the tank body.

[0050] S3. Impregnation-drying: inject silica sol into the tank, keep it for 2 hours, open the upper and lower valves of the tank, discharge all the sol inside the tank, set the temperature control program, and make the tank rise at a rate of 3°C / min Raise the temperature to 120°C and keep it warm for 24 hours to dry the fiber-reinforced ceramic flat body.

[0051] S4. Densification: Repeat the impregnation-drying process 6 times to uniformly densify the fiber-reinforced ceramic flat plate.

[0052] S5, ...

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Abstract

The invention discloses a forming method of a fiber-reinforced silicon dioxide ceramic composite material, and relates to the technical field of fiber-reinforced silicon dioxide ceramic composites. A vacuum impregnation-drying integrated forming device is utilized, the fiber-reinforced silicon dioxide ceramic composite material is rapidly formed at a time through the steps of fiber preform pretreatment, mold closing, impregnation-drying, demolding, heat treatment and the like. multiple mold closing and demolding processes are omitted, and the influence of manual operation on the uniformity of the composite material is reduced.

Description

technical field [0001] The invention relates to the technical field of fiber-reinforced silica ceramic composite materials, in particular to a molding method of fiber-reinforced silica ceramic composite materials. Background technique [0002] Fiber-reinforced oxide ceramic matrix composites have high temperature resistance, oxidation resistance, good mechanical strength and heat insulation properties. This material can replace metal materials and non-oxide based ceramic composites with poor strength and toughness under high temperature oxidative conditions. It meets the application requirements of a new generation of aerospace vehicles and aero-engines, and has broad application prospects in aviation, aerospace, nuclear energy and other fields. At present, the preparation method of fiber-reinforced silica ceramics usually adopts vacuum impregnation-drying molding process. This method needs to weave continuous fibers into three-dimensional fabrics in advance, then perform f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/14C04B35/622B28B1/50B28B11/24B28B13/06
CPCC04B35/80C04B35/14C04B35/622B28B1/50B28B11/243B28B13/06C04B2235/5224C04B2235/5232
Inventor 慈吉良刘一畅张剑吕毅张昊赵英民
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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