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Improved Z-pin method for two-dimensional ceramic matrix composite

A composite material and composite material board technology, applied in the field of Z-pin, can solve problems such as the inability to fully exert mechanical properties, and achieve the effect of not losing shear strength, reducing fracture, and improving Z-direction strength

Active Publication Date: 2014-09-17
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: The purpose of the present invention is to provide an improved Z-pin method for Z-direction reinforcement of two-dimensional ceramic matrix composite materials in view of the deficiency that the existing vertical implantation Z-pin method cannot fully exert its mechanical properties

Method used

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  • Improved Z-pin method for two-dimensional ceramic matrix composite
  • Improved Z-pin method for two-dimensional ceramic matrix composite
  • Improved Z-pin method for two-dimensional ceramic matrix composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Prepare a two-dimensional carbon fiber plain weave preform, the size of which is 50×50×5mm 3 ;

[0037](2) The carbon fiber Z-pin component is prepared by pultrusion molding process, and the carbon fiber Z-pin component with the design length and diameter (0.2-1.0 mm) is obtained after the heating mold is solidified and cut, and the diameter is 0.28 mm. Carbon fiber Z-pin components, using 3k carbon fibers to prepare carbon fiber Z-pin components with a diameter of 0.50mm;

[0038] (3) The oblique holes are drilled on the two-dimensional carbon fiber plain weave prefabricated body. The distribution law of the oblique holes on the two-dimensional carbon fiber plain weave prefabricated body is as follows: Define the oblique hole axial direction and the two-dimensional carbon fiber plain weave prefabricated body method The included angle is the oblique angle θ, the center of the lower surface of the two-dimensional carbon fiber plain weave prefabricated body is the or...

Embodiment 2

[0059] Described θ=15 °, all the other are the same as embodiment 1

Embodiment 3

[0061] Described θ=30 °, all the other are the same as embodiment 1

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Abstract

The invention provides an improved Z-pin method for a two-dimensional ceramic matrix composite. The improved Z-pin method comprises the following steps of (1) preparing a two-dimensional carbon fiber plain woven preform; (2) preparing carbon fiber Z-pin members by using a pultrusion process; (3) drilling inclined holes in the two-dimensional carbon fiber plain woven preform according to a certain distribution rule; (4) embedding the carbon fiber Z-pin members in the inclined holes of the two-dimensional carbon fiber plain woven perform; (5) depositing the two-dimensional carbon fiber plain woven perform with the carbon fiber Z-pin members to densify the same, and thus a two-dimensional ceramic matrix composite plate is obtained; and (6) trimming the parts of the carbon fiber Z-pin members. The Z-pin members are inclinedly embedded according to a certain distribution rule, thereby transferring connection shear loading into a combination of extrusion loading and shear loading, more effectively enhancing Z-direction strength of the two-dimensional ceramic matrix composite and inhibiting stratified damages.

Description

technical field [0001] The invention belongs to the technical field of composite material Z-pin (that is, Z-direction reinforcement). Specifically, it relates to an improved Z-pin method for two-dimensional C / SiC ceramic matrix composites in a thermo-acoustic-vibration composite dynamic environment. Background technique [0002] Ceramic Matrix Composite (CMC) has the advantages of high temperature resistance, high specific strength, high specific stiffness, and good thermal stability. Ideal material. The aircraft structure is generally designed as a thin-walled stiffened plate shell structure, and the two-dimensional braided ceramic matrix composite laminate is more suitable for this type of structure than the three-dimensional braided composite material. As the main material for the heat-resistant and load-bearing integrated structure of hypersonic vehicles, the two-dimensional C / SiC plain weave ceramic matrix composite has good in-plane mechanical properties, simple prep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/80C04B35/565C04B35/622
Inventor 周亚东费庆国吴邵庆韩晓林
Owner SOUTHEAST UNIV
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