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Preparation method of SiC fiber enhanced ceramic-based composite material

A composite material and fiber-reinforced technology, which is applied in the field of composite materials, can solve the problems of high temperature resistance, poor mechanical properties, and long preparation cycle, and achieve excellent high temperature stability, low porosity, and excellent wave-absorbing performance. Effect

Inactive Publication Date: 2018-12-07
成都成维精密机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Solve the technical problems of poor mechanical properties, long preparation period and high cost of SiCf / SiC composite materials in the prior art
The disadvantage of this method is that the high temperature resistance needs to be further improved

Method used

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  • Preparation method of SiC fiber enhanced ceramic-based composite material

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Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method of a SiC fiber reinforced ceramic matrix composite material in this embodiment, the specific steps are as follows:

[0027] 1. Contains ZrB 2 Preparation of the SiBCN-Ti precursor powder: Synthesize the titanium-containing polysilaborazane PBSZ precursor with hexamethyldisilazane, boron trichloride, trichlorosilane, and dichlorotitanium dichloride as raw materials, wherein The molar ratio of hexamethyldisilazane, boron trichloride, trichlorosilane and titanocene dichloride is 20:15:4:2; the synthesized titanium-containing PBSZ precursor is dissolved in toluene to obtain titanium-containing PBSZ precursor solution, and ZrB with a particle size of 400nm 2 The ceramic powder is added to the prepared titanium-containing PBSZ precursor solution to obtain a mixed slurry, and the added ZrB 2 The mass ratio of the ceramic powder to the titanium-containing PBSZ precursor solution in the titanium-containing PBSZ precursor solution is 1:4; the prepared mixed...

Embodiment 2

[0031] A preparation method of a SiC fiber reinforced ceramic matrix composite material in this embodiment, the specific steps are as follows:

[0032] 1. Contains ZrB 2 Preparation of the SiBCN-Ti precursor powder: Synthesize the titanium-containing polysilaborazane PBSZ precursor with hexamethyldisilazane, boron trichloride, trichlorosilane, and dichlorotitanium dichloride as raw materials, wherein The molar ratio of hexamethyldisilazane, boron trichloride, trichlorosilane and titanocene dichloride was 15:20:5:1; the synthesized titanium-containing PBSZ precursor was dissolved in xylene to obtain PBSZ precursor solution of titanium, and ZrB with a particle size of 300nm 2 The ceramic powder is added to the prepared titanium-containing PBSZ precursor solution, and the added ZrB 2 The mass ratio of the ceramic powder to the titanium-containing PBSZ precursor solution in the titanium-containing PBSZ precursor solution was 1:3, and then cross-linked at 200°C for 6h to obtain t...

Embodiment 3

[0036] A preparation method of a SiC fiber reinforced ceramic matrix composite material in this embodiment, the specific steps are as follows:

[0037] 1. Contains ZrB 2 Preparation of the SiBCN-Ti precursor powder: Synthesize the titanium-containing polysilaborazane PBSZ precursor with hexamethyldisilazane, boron trichloride, trichlorosilane, and dichlorotitanium dichloride as raw materials, wherein The molar ratio of hexamethyldisilazane, boron trichloride, trichlorosilane and titanocene dichloride was 15:15:5:2; the synthesized titanium-containing PBSZ precursor was dissolved in xylene to obtain PBSZ precursor solution of titanium, and ZrB with a particle size of 500nm 2 The ceramic powder is added to the prepared titanium-containing PBSZ precursor solution, and the added ZrB 2 The mass ratio of the ceramic powder to the titanium-containing PBSZ precursor solution in the titanium-containing PBSZ precursor solution was 1:2, and then cross-linked at 200 ° C for 4 h to obtai...

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Abstract

The invention belongs to the technical field of composite materials and discloses a preparation method of a SiC fiber enhanced ceramic-based composite material. The preparation method comprises the following steps: 1) preparing SiBCN-Ti precursor powder containing ZrB2; 2) preparing SiC fibers into a pre-formed part; then placing the precursor powder and the SiC fiber pre-formed part into a mold and carrying out hot pressing treatment; after cooling, de-molding to obtain a SiC fiber enhanced composite material; then transferring the SiC fiber enhanced composite material into a cracking furnaceand carrying out cracking treatment to obtain a porous SiC fiber enhanced ceramic-based composite material; and 3) infiltrating SiNBC through a chemical vapor infiltration technology and densifying the composite material. The SiC fiber enhanced ceramic-based composite material prepared by the invention has high purity, has excellent high-temperature stability, bending strength and cracking toughness and has excellent wave absorption performance.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a preparation method of a ceramic matrix composite material, in particular to a SiC with good high temperature stability, low porosity, high density, high bending strength, high fracture toughness and excellent wave-absorbing performance. A method for the preparation of fiber reinforced ceramic matrix composites. Background technique [0002] Fiber-reinforced ceramic matrix composites have the characteristics of outstanding high temperature resistance, excellent oxidation resistance, low density and high toughness, and have been widely used in aerospace and national defense heat-resistant parts, such as space shuttle heat insulation tiles, engine exhaust nozzles, missiles Radome etc. SiC ceramic fibers have the characteristics of good high-temperature mechanical properties, strong high-temperature stability, and adjustable dielectric properties, and are w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/584C04B35/583C04B35/80C04B35/622
CPCC04B35/806C04B35/583C04B35/589C04B35/622C04B2235/3813C04B2235/5244C04B2235/614C04B2235/6562C04B2235/6567C04B2235/96
Inventor 不公告发明人
Owner 成都成维精密机械制造有限公司
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