Method for preparing continuous fiber cloth reinforced silica ceramic-based composite material

A continuous fiber and silica technology, which is applied in the preparation of composite materials and the preparation of continuous fiber cloth reinforced silica ceramic matrix composite materials, can solve the problems of many operators and long weaving time, so as to reduce costs and improve Excellent mechanical properties and thermal shock resistance

Active Publication Date: 2015-03-25
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation of fiber preforms mainly adopts the three-dimensional weaving method, and the common ones are 2.5-dimensio

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Method for preparing continuous fiber cloth reinforced silica ceramic-based composite material
  • Method for preparing continuous fiber cloth reinforced silica ceramic-based composite material
  • Method for preparing continuous fiber cloth reinforced silica ceramic-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment includes the following steps:

[0032] (1) First, take 5 layers of satin quartz fiber cloth as a unit, lay them together, and then sew the 5 layers of fiber cloth together with bundles of fibers; the suture line forms a sinusoidal line trend in the 5 layers of cloth;

[0033] (2) Lay another unit of fiber cloth on the fiber cloth sewn by the first unit, and then repeat the sewing process in step (1). stitched together;

[0034] (3) Repeat step (2) for a total of 10 units to obtain a laminated stitched fiber cloth prefabricated part;

[0035] Perform normal puncture on the laminated stitched fiber cloth preform; the method of normal puncture is: use the stitching yarn to puncture the fiber cloth laminated fabric prepared according to the previous steps (1)~(3) to obtain a laminated Stitched and punctured fiber cloth prefabricated parts; laminated stitched and punctured fiber cloth prefabricated parts or fiber volume fraction in laminated stitched and pu...

Embodiment 2

[0047] This embodiment includes the following steps:

[0048] (1) First, take 5 layers of twill quartz fiber cloth as a unit, lay them together, and then sew the 5 layers of fiber cloth together with bundles of fibers; the suture line forms a sinusoidal line trend in the 5 layers of cloth;

[0049](2) Lay another unit of fiber cloth on the fiber cloth sewn by the first unit, and then repeat the sewing process in step (1). stitched together;

[0050] (3) Then design the thickness according to the material or component prefabrication, and repeat step (2) to obtain a laminated stitched fiber cloth prefabrication (5 layers of cloth per unit, 10 units, a total of 50 layers of cloth, and the stitching stitch density is 10× 10mm, the normal puncture density is 5×5mm);

[0051] Perform normal puncture on the laminated stitched fiber cloth preform; the method of normal puncture is: use the stitching yarn to puncture the fiber cloth laminated fabric prepared according to the previous ...

Embodiment 3

[0062] This embodiment includes the following steps:

[0063] (1) First, take 5 layers of satin quartz fiber cloth as a unit, lay them together, and then sew the 5 layers of fiber cloth together with bundles of fibers; the suture line forms a sinusoidal line trend in the 5 layers of cloth;

[0064] (2) Lay another unit of fiber cloth on the fiber cloth sewn by the first unit, and then repeat the sewing process in step (1). stitched together;

[0065] (3) Repeat step (2) for a total of 10 units to obtain a laminated stitched fiber cloth prefabricated part;

[0066] Perform normal puncture on the laminated stitched fiber cloth preform; the method of normal puncture is: use the stitching yarn to puncture the fiber cloth laminated fabric prepared according to the previous steps (1)~(3) to obtain a laminated Stitched and punctured fiber cloth prefabricated parts; laminated stitched and punctured fiber cloth prefabricated parts or fiber volume fraction in laminated stitched and pu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a method for preparing a continuous fiber cloth reinforced silica ceramic-based composite material. The method comprises the following steps: (1) sewing n layers of fiber cloth together; (2) further sewing; (3) repeatedly sewing; (4) adjusting the thickness; (5) dipping the fiber cloth by adopting a water-alcohol solution of ethyl orthosilicate or silica sol; (6) treating at the temperature of 70-90 DEG C for 12-24 hours, drying at the temperature of 110-130 DEG C for 4-8 hours, and drying at the temperature of 140-160 DEG C for 2-4 hours; (7) repeating the steps (5) and (6) for 1-7 times; (8) adding the mixture into a high temperature furnace, and treating for 1-2 hours; and (9) repeating the steps (5) to (8) for 1-5 times, thereby obtaining the product. The composite material system disclosed by the invention is excellent in mechanical property, dielectric property and ablation property, the cost is low, and the mechanical property of the fiber reinforced silica composite material can be obviously improved.

Description

technical field [0001] The invention relates to a method for preparing a continuous fiber cloth reinforced silica ceramic matrix composite material, in particular to a method for preparing a composite material with heat resistance, load bearing, ablation resistance and wave penetration, which belongs to the technology of ceramic matrix composite materials field. Background technique [0002] In order to ensure the normal operation of the missile guidance system, the missile radome must have multiple functions such as wave penetration, heat protection and load bearing. As a ceramic matrix material with excellent dielectric, mechanical, high temperature resistance, heat resistance and other properties, quartz ceramics have low cost and provide the possibility for large-scale production. However, the toughness and service reliability of pure ceramic materials are relatively poor, and brittle cracks are prone to occur especially in harsh service environments, which seriously af...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): C04B35/80C04B35/14C04B35/622
Inventor 王思青张长瑞李斌曹峰姜勇刚吴纯志周六顺肖永红
Owner NAT UNIV OF DEFENSE TECH
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