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A kind of protective gradient carbon-ceramic composite material with ceramic coating 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 the surface area, increasing the ablation surface area, and improving the resistance to interlaminar cracking.

Active Publication Date: 2022-01-28
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 defect that coating protection failure is prone to occur in two-dimensional planar ceramic coatings in the prior art, thereby providing a ceramic coating protective gradient carbon-ceramic composite and its preparation method

Method used

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  • A kind of protective gradient carbon-ceramic composite material with ceramic coating and preparation method thereof
  • A kind of protective gradient carbon-ceramic composite material with ceramic coating and preparation method thereof
  • A kind of protective gradient carbon-ceramic composite material with ceramic coating 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 gradient carbon-ceramic composite material for ceramic coating protection and a preparation method thereof. The gradient carbon-ceramic composite material for ceramic coating protection comprises: a gradient carbon-ceramic composite material, the surface of which is provided with a concave structure; the gradient carbon-ceramic composite material is Gradient C / C-ZrC-SiC composite material; and, the ultra-high temperature ceramic coating is continuously arranged along the surface of the gradient carbon-ceramic composite material and the inner wall of the concave structure; the ultra-high temperature ceramic coating is composed of refractory metal along the gradient carbon-ceramic composite Diffusion and infiltration on the surface of the material, and the refractory metal carbide coating formed by reacting with the surface of the gradient carbon-ceramic composite material; so that the formed ceramic coating is a three-dimensional socket structure coating, and its interface strength is much greater than that of two Dimensional flat coating, and the setting of the concave structure greatly increases the surface area of ​​the coating, and at the same time can increase the resistance of the melt flow on the surface of the composite material, thereby improving the overall temperature resistance of the composite material and reducing the risk of coating peeling.

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 Patents(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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