Ceramic coating protection gradient carbon-ceramic composite material and preparation method thereof

A carbon-ceramic composite material and ceramic coating technology, applied in the field of carbon-ceramic composite materials, can solve problems such as coating protection failure, and achieve the effects of increasing surface area, reducing ablation temperature, and improving interlaminar shear strength.

Active Publication Date: 2021-11-02
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the two-dimensional planar ceramic coating is prone to coating protection failure, so as to provide a ceramic coating protective gradient carbon-ceramic composite and its preparation method

Method used

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  • Ceramic coating protection gradient carbon-ceramic composite material and preparation method thereof
  • Ceramic coating protection gradient carbon-ceramic composite material and preparation method thereof
  • Ceramic coating protection gradient carbon-ceramic composite material and preparation method thereof

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Embodiment 1

[0081] combine Figure 1-2 , Example 1 relates to a ceramic coating protective gradient carbon-ceramic composite material, which is prepared according to the following steps:

[0082] 1. Preparation of gradient carbon-ceramic composites:

[0083] S1, deposition: 0.9g / cm 3 After the C / C composite material is polished and polished as a whole, it is washed with absolute ethanol, and placed in an oven at 100°C for 12 hours for later use; the chemical vapor deposition method is used to select MTS (methyltrichlorosilane) with a purity of 99.99%. The deposition temperature is 1100°C, the deposition time is 30h, and the deposition atmosphere is vacuum. The density of the SiC modified C / C composite material obtained by the final deposition reaches 1.3g / cm 3 ;

[0084] S2. Powder spreading: the middle of the C / C composite material plate is separated by graphite blocks, the metal powder for infiltration is laid on the left side, and no metal powder is laid on the right side. In this ...

Embodiment 2

[0095] Embodiment 2-3 relates to a kind of ceramic coating protective graded carbon-ceramic composite material, and its difference with embodiment 1 is only that in embodiment 2, in the metal material filled, the mass ratio of Zr powder to V powder is 2:1. Wherein the consumption of Zr is 1.06g, the consumption of V is 0.533g, the consumption of C element is 0.05g, and the consumption of liquid paraffin is 0.08g. In Example 3, in the filled metal material, the mass ratio of Zr powder to V powder is 1:1. Wherein the consumption of Zr is 0.8g, the consumption of V is 0.8g, the consumption of C element is 0.05g, and the consumption of liquid paraffin is 0.08g.

Embodiment 4

[0097] Such as image 3 As shown, this embodiment relates to a gradient carbon-ceramic composite material with ceramic coating protection, which differs from Embodiment 1 only in the steps of forming a concave structure and filling metal materials.

[0098] Specifically, in this embodiment, the concave structure is formed by processing the gradient C / C-ZrC-SiC composite material with a gradient change in the vertical direction into a round block with a diameter of 30 mm and a thickness of 10 mm, and then on the surface of the round block sample Drill rectangular holes with a spacing of 6 mm, a hole length of 7 mm on a long side, a short side length of 3 mm, and a hole depth of 2 mm.

[0099] The filling metal material is directly selected square ZrV with a size of 7×3×2mm 2 The alloy sintered body (Beijing Xingrongyuan Technology Co., Ltd.) is used as the overflow and infiltration raw material, which is put into the pre-formed rectangular blind hole.

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Abstract

The invention discloses a ceramic coating protection gradient carbon-ceramic composite material and a preparation method thereof. The ceramic coating protection gradient carbon-ceramic composite material comprises: a gradient carbon-ceramic composite material which is provided with a concave structure on the surface thereof and is a gradient C/C-ZrC-SiC composite material; and an ultrahigh-temperature ceramic coating which is continuously arranged along the surface of the gradient carbon-ceramic composite material and the inner wall surface of the concave structure. The ultrahigh-temperature ceramic coating is an indissolvable metal carbide coating formed by diffusing and infiltrating indissolvable metal along the surface of the gradient carbon-ceramic composite material and reacting the indissolvable metal with the surface of the gradient carbon-ceramic composite material. Therefore, the formed ceramic coating is a three-dimensional jack structure coating, the interfacial strength of the ceramic coating is far higher than that of a two-dimensional plane coating, the surface area of the coating is greatly increased due to the arrangement of the concave structure, meanwhile, the flow resistance of melt on the surface of the composite material can be improved, then the overall temperature resistance of the composite material can be improved, and the risk of coating stripping is reduced.

Description

technical field [0001] The invention relates to the field of carbon-ceramic composite materials, in particular to a ceramic coating protective gradient carbon-ceramic composite material and a preparation method thereof. Background technique [0002] With the rapid development of aerospace technology, hypersonic vehicles have become the focus of aerospace research at this stage. Due to the fact that the flight speed of a hypersonic vehicle can be as high as Mach number 5 or more, and its surface will generate strong aerodynamic heating and high-speed particle erosion during flight, the surface temperature of some parts can be as high as 2000°C during its flight. Therefore, hypersonic vehicles have more stringent requirements on the temperature resistance limit, high temperature oxidation resistance, and strength and toughness under high-speed airflow erosion of the materials they prepare. Designing and preparing thermal protection materials with good high-temperature ablatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/56C04B35/565C04B41/87
CPCC04B35/83C04B35/5622C04B35/565C04B41/009C04B41/87C04B41/5057C04B2235/6562C04B2235/77C04B2235/775C04B41/4523C04B41/4556C04B41/0072
Inventor 孙威田甜熊翔张红波
Owner CENT SOUTH UNIV
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