Method for improving interlayer mechanical property of two-dimensional fiber cloth reinforced ceramic-based composite material

A composite material layer and composite material technology, which is applied in the field of ceramic matrix composite material preparation, can solve the problems of material damage tolerance decrease, interlayer shear strength increase, and interlayer shear strength low, so as to improve the shear strength and toughness, the method is simple and effective, and the effect of easy operation

Active Publication Date: 2019-01-18
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] The purpose of the present invention is to solve the problems in the above-mentioned prior art that the interlayer shear strength is too low due to the uneven microscopic distribution of the interlayer matrix slurry and sol, or that the interlayer shear strength is greatly increased, resulting in material damage. To improve the mechanical properties of two-dimensional fiber cloth-reinforced ceramic matrix composites between layers, so as to obtain sufficient strength and toughness between layers of ceramic matrix composites

Method used

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  • Method for improving interlayer mechanical property of two-dimensional fiber cloth reinforced ceramic-based composite material
  • Method for improving interlayer mechanical property of two-dimensional fiber cloth reinforced ceramic-based composite material
  • Method for improving interlayer mechanical property of two-dimensional fiber cloth reinforced ceramic-based composite material

Examples

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Effect test

Embodiment 1

[0026] An Improved Quartz Fiber Cloth Reinforced SiO 2f -SiO 2 The method for the interlaminar mechanical properties of composite materials, the specific steps are as follows:

[0027] 1) Add 30wt% tetraacicular zinc oxide whiskers (for its shape, see figure 1 ), at 90°C, use a temperature-controlled magnetic stirrer with a rotation speed of 60 rpm for 30 minutes, and make the viscosity reach 25mpa·s for later use;

[0028] 2) Apply the mixture obtained in step 1) evenly on the quartz fiber cloth with a thickness of 300 μm; use the same method and standard to paint 15 layers of quartz fiber cloth, and stack the 15 layers of quartz fiber cloth in sequence ;

[0029] 3) The obtained laminated quartz fiber cloth is hot-pressed to form a prefabricated body, wherein the hot-pressing temperature is 120° C., the pressure is 80 MPa, and the holding time is 60 minutes;

[0030] 4) The preform obtained in step 3) is impregnated with silica sol in a vacuum environment, and dried at 9...

Embodiment 2

[0048] Use the same method to improve Nextel720-Al 2 o 3 Composite interlaminar mechanical properties; specific steps are as follows:

[0049] 1) Add 10wt% tetraacicular zinc oxide whiskers to the nano-alumina slurry, heat-treat it with a temperature-controlled magnetic stirrer with a rotation speed of 90 rpm at 80°C for 10 minutes, and make the viscosity reach 15mpa·s for later use ;

[0050] 2) Apply the mixture obtained in step 1) evenly on the Nextel720 fiber cloth with a thickness of 100 μm; use the same method and standard to paint 25 layers of Nextel720 fiber cloth, and stack the 25 layers of Nextel720 fiber cloth in turn ;

[0051] 3) The obtained laminated Nextel720 fiber cloth is hot-pressed to form a prefabricated body, wherein the hot-pressing temperature is 200°C, the pressure is 60MPa, and the holding time is 30min;

[0052] 4) The preform obtained in step 3) is impregnated with nano-alumina slurry in a vacuum environment, and dried at 90°C; then deesterified...

Embodiment 3

[0056] Use the same method to improve Nextel610-Al 2 o 3 Composite interlaminar mechanical properties; specific steps are as follows:

[0057] 1) Add 20wt% tetrapod-shaped zinc oxide whiskers to the nano-alumina slurry, heat-treat at 70°C using a temperature-controlled magnetic stirrer with a rotation speed of 75 rpm for 15 minutes, and make the viscosity reach 20mpa·s for later use ;

[0058] 2) Apply the mixture obtained in step 1) evenly on the Nextel610 fiber cloth with a thickness of 200 μm; use the same method and standard to paint 20 layers of Nextel610 fiber cloth, and stack the 20 layers of Nextel610 fiber cloth in turn ;

[0059] 3) The obtained laminated Nextel610 fiber cloth is hot-pressed to form a prefabricated body, wherein the hot-pressing temperature is 160°C, the pressure is 70MPa, and the holding time is 40min;

[0060] 4) The preform obtained in step 3) is impregnated with nano-alumina slurry in a vacuum environment, and dried at 85°C; then deesterified...

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Abstract

The invention provides a method for improving interlayer mechanical property of a two-dimensional fiber cloth reinforced ceramic-based composite material. The method solves the problem that interlayersubstrate slurry and sol are not uniformly microcosmically distributed in the prior art, thus the interlayer shearing intensity is excessively low, or the interlayer shearing intensity greatly increases, and as a result, the damage tolerance limit of a material decreases. The method comprises the steps of coating slurry or sol in which tetrapod-like zinc oxide whiskers are uniformly mixed or themixture of the slurry and the sol on two-dimensional fabric clothes; overlapping; thermally pressing; permeating; drying; removing ester; sintering, wherein the tetrapod-like zinc oxide whiskers can form a network; each tetrapod-like zinc oxide whisker can coat the slurry or the soil in order to be uniformly distributed among the two-dimensional fabric clothes; a tetrapod-like bodies can penetratethe two-dimensional fabric cloth and perform bridging reinforcing effect among the two-dimensional fabric clothes; in addition, the expansion route of cracks in a substrate can be greatly increased;the quantity of added tetrapod-like zinc oxide whiskers can be adjusted to improve the interlayer shearing intensity and toughness of the two-dimensional fiber cloth reinforced ceramic-based compositematerial.

Description

technical field [0001] The invention belongs to the technical field of preparation of ceramic matrix composite materials, and relates to a method for improving the interlayer mechanical properties of continuous fiber reinforced ceramic matrix composite materials, in particular to a method for improving the interlayer mechanical properties of two-dimensional fiber cloth reinforced ceramic matrix composite materials. Background technique [0002] Continuous fiber reinforced ceramic matrix composites have the characteristics of high temperature resistance, high strength, and high toughness. Two-dimensional fiber cloth reinforced ceramic matrix composites are widely used because of the simple weaving process of prefabricated bodies and low cost. However, for ceramic matrix composites prepared by impregnating slurry or sol with two-dimensional fiber cloth, the matrix and macroscopic defects gather and distribute unevenly between layers, which makes the interlayer shear strength to...

Claims

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Application Information

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IPC IPC(8): B32B37/10B32B37/06B32B38/16B32B37/08C04B35/10C04B35/14C04B35/624C04B35/638C04B35/80
CPCB32B37/06B32B37/08B32B37/10B32B38/164B32B2307/50B32B2307/558C04B35/10C04B35/14C04B35/624C04B35/638C04B35/803C04B2235/522C04B2235/6562C04B2235/6567
Inventor 张海昇李建章董玉婷许建锋成来飞
Owner XIAN XINGUI CERAMIC COMPOSITE MATERIAL CO LTD
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