2D carbon/silicon-silicon carbide composite material pin preparation method and preparation method and structure of 2D carbon/silicon-silicon carbide composite material pin preform

A technology of composite materials and silicon carbide, which is applied in the field of corrosion-resistant and oxidation-resistant composite materials, high temperature resistance, preparation and processing of ceramic matrix composite materials, and high strength. It can solve unstable product performance, long production cycle, and high cost. problems, to achieve the effect of uniform force, improved mechanical properties, and high connection strength

Active Publication Date: 2016-08-10
XIAN XINGUI CERAMIC COMPOSITE MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the shortcomings of the preparation technology of pin-punched C/SiC composite material (CVI process) pins with complex structures, such as long production cycle, high cost, and large differences in product

Method used

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  • 2D carbon/silicon-silicon carbide composite material pin preparation method and preparation method and structure of 2D carbon/silicon-silicon carbide composite material pin preform
  • 2D carbon/silicon-silicon carbide composite material pin preparation method and preparation method and structure of 2D carbon/silicon-silicon carbide composite material pin preform
  • 2D carbon/silicon-silicon carbide composite material pin preparation method and preparation method and structure of 2D carbon/silicon-silicon carbide composite material pin preform

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Experimental program
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Example Embodiment

[0051] Such as Figure 2-3 As shown, the two-dimensional carbon / silicon-silicon carbide composite material pin preform of the present invention includes a multilayer two-dimensional carbon cloth, and the included angle of the corresponding fibers of two adjacent layers of the two-dimensional carbon cloth in the multilayer two-dimensional carbon cloth is 45°, the two-dimensional carbon / silicon-silicon carbide composite pin preform also includes a sewing structure. The sewing structure includes a plurality of U-shaped fibers distributed in a square matrix. Single-side vertical penetration of multilayer two-dimensional carbon cloth. The four sides of the multi-layer two-dimensional carbon cloth are stitched with carbon fibers. Sometimes, the ends of two adjacent rows of U-shaped fibers in the square matrix are also provided with a U-shaped fiber. The preparation method of the two-dimensional carbon / silicon-silicon carbide composite material pin preform includes the following step...

Example Embodiment

[0058] Example 1:

[0059] This embodiment is a method for preparing a two-dimensional carbon / silicon-silicon carbide composite material pin. The specific process is:

[0060] Step 1. Make a two-dimensional flat plate preform. Use two-dimensional carbon cloth to spread alternately in the direction of flat (0°) and oblique (45°) layer by layer (the thickness should be greater than the pin diameter and the machining allowance is left), and the surface should be perforated (8~15× 8~15mm (arrangement method) graphite flat plate flattened the carbon cloth, the arch frame is fixed on the bracket, the carbon fiber is used to pass through each hole, and the carbon cloth is sewn vertically to make a two-dimensional flat preform.

[0061] Step 2, depositing a pyrolytic carbon interface layer. The pyrolytic carbon protective layer is infiltrated into the two-dimensional flat preform through the deposition furnace. The process conditions are: the deposition temperature is 700 ℃, the deposition...

Example Embodiment

[0067] Example 2:

[0068] Step 1. Make a two-dimensional flat plate preform. Use two-dimensional carbon cloth to spread alternately in the direction of flat (0°) and oblique (45°) layer by layer (the thickness should be greater than the pin diameter and the machining allowance is left), and the surface should be perforated (8~15× 8~15mm (arrangement method) graphite flat plate flattened the carbon cloth, the arch frame is fixed on the bracket, the carbon fiber is used to pass through each hole, and the carbon cloth is sewn vertically to make a two-dimensional flat preform.

[0069] Step 2, depositing a pyrolytic carbon interface layer. The pyrolytic carbon protective layer is infiltrated into the two-dimensional flat plate preform through the deposition furnace. The process conditions are: the deposition temperature is 800 ℃, the deposition furnace is evacuated to 3 kPa, and the propylene gas with a flow rate of 4L / min is used as the deposition gas, 8L / min. Min Ar gas is used as...

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Abstract

The invention relates to a 2D carbon/silicon-silicon carbide composite material pin preparation method and a preparation method and structure of a 2D carbon/silicon-silicon carbide composite material pin preform. The pin preparation method comprises 1, preparing a preform through horizontal paving (0 degree)-inclined paving (45 degrees) alternative laying of a 2D carbon fabric, graphite mold-based setting and carbon fiber vertical seaming on the multilayer carbon fabric, 2, depositing a pyrolytic carbon protective layer in the preform, 3, carrying out chemical vapor infiltration (CVI) to obtain a silicon carbide base, 4, cutting a flat blank to obtain a strip-shaped pin blank with the square section, 5, carrying out CVI silicon carbide protection of exposed fibers, 6, carrying out reactive melt infiltration (RMI) treatment, 7, milling the pin blank to obtain a pin with a standard size and 8, carrying out examination to obtain a carbon/silicon-silicon carbide composite material pin finished product. Through combination of CVI and RMI, the preparation method has the advantages of low production cost, short production period, low product porosity, high density and batch production. The ceramic-based composite material prepared by the CVI and RMI has shear strength of 80-100MPa at the room temperature.

Description

technical field [0001] The invention relates to the technical field of preparation and processing of ceramic matrix composite materials, in particular to a preparation process of a two-dimensional carbon / silicon-silicon carbide composite material pin, which is mainly used in high-strength, high-temperature-resistant, corrosion-resistant, and oxidation-resistant composite material connections field. Background technique [0002] Ceramic matrix composites are favored by various aviation and aerospace fields for their high strength, high hardness, high temperature resistance, wear resistance, corrosion resistance, low density and other excellent thermophysical and mechanical properties, especially in the harsh environment of aircraft. For parts, ceramic matrix composites can replace traditional special metal materials and improve the comprehensive performance of parts in this environment. [0003] Due to the limitation of composite material weaving process, it is very difficul...

Claims

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Application Information

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IPC IPC(8): B32B9/00B32B9/04B32B5/06B32B37/00B28D1/16C04B35/78C04B35/565C04B35/52C04B35/622
CPCB28D1/16B32B5/06B32B5/26B32B9/007B32B9/047B32B37/00B32B2262/106B32B2605/18C04B35/521C04B35/565C04B35/622C04B35/806C04B2235/483C04B2235/5248C04B2235/5256C04B2235/614C04B2235/96
Inventor 成来飞冯锋左新章邬国平郭拥军王鹏
Owner XIAN XINGUI CERAMIC COMPOSITE MATERIAL CO LTD
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