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Low-density carbon-tile surface oxidation-resistant coating capable of resisting temperature of 1700 DEG C and preparation method thereof

A technology of anti-oxidation coating and anti-oxidation layer, which is applied in the field of thermal protection materials, can solve the problems of limited temperature resistance level of anti-oxidation coating, oxidation ablation, etc., achieve short cycle, improve temperature resistance level, and simple preparation process Effect

Active Publication Date: 2016-12-21
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the temperature resistance level of the anti-oxidation coating is limited, and obvious oxidation ablation will occur for a long time above 1500 °C

Method used

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  • Low-density carbon-tile surface oxidation-resistant coating capable of resisting temperature of 1700 DEG C and preparation method thereof
  • Low-density carbon-tile surface oxidation-resistant coating capable of resisting temperature of 1700 DEG C and preparation method thereof
  • Low-density carbon-tile surface oxidation-resistant coating capable of resisting temperature of 1700 DEG C and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0035] A method for preparing an anti-oxidation coating on the surface of a low-density carbon tile resistant to 1700°C, the specific steps are:

[0036] 1) According to the shape characteristics and dimensions of different heat protection products, low-density carbon tiles are processed to ensure the processing accuracy and obtain low-density carbon tile base materials;

[0037] 2) Use Si, B, C, O ceramic precursors to brush and impregnate the low-density carbon tile base material obtained in step 1) for 2 to 4 times, and dry once after each brushing. The drying temperature is 250~300℃, keep warm for 2~3 hours;

[0038] 3) Perform high-temperature pyrolysis on the intermediate state sample obtained in step 2). The pyrolysis treatment temperature is 1000-1300 ° C, and the temperature is kept for 1-3 hours. After each cracking, the surface of the sample is treated to remove the soft bonding powder produced by surface cracking. body particles;

[0039] 4) Repeat steps 2) to 3)...

Embodiment 1

[0062] An anti-oxidation coating on the surface of low-density carbon tiles resistant to 1700°C, the anti-oxidation coating includes an anti-oxidation transition layer and a surface high temperature resistant anti-oxidation layer; the anti-oxidation transition layer includes an anti-oxidation base coating and an intermediate layer, such as figure 1 shown; wherein the anti-oxidation base coating is a refractory metal compound, and the refractory metal compound enters the position at the lowest end of the low-density carbon tile to the top of the low-density carbon tile, that is, the position on the surface of the low-density carbon tile, and its content increases successively ; The total thickness of the anti-oxidation base coating and the intermediate layer is 2.1-2.5 mm, and the elemental composition of the refractory metal compound includes Si and C; the elemental composition of the intermediate layer is Si and C, and the surface High temperature resistant and anti-oxidation ...

Embodiment 2

[0073] An anti-oxidation coating on the surface of low-density carbon tiles resistant to 1700°C, the anti-oxidation coating includes an anti-oxidation transition layer and a surface high temperature resistant anti-oxidation layer; the anti-oxidation transition layer includes an anti-oxidation base coating and an intermediate layer, such as figure 1 shown; wherein the anti-oxidation base coating is a refractory metal compound, and the refractory metal compound enters the position at the lowest end of the low-density carbon tile to the top of the low-density carbon tile, that is, the position on the surface of the low-density carbon tile, and its content increases successively The total thickness of the anti-oxidation base coating and the intermediate layer is 2.0-2.7mm, and the elemental composition of the refractory metal compound includes Si, B, and C; the elemental composition of the intermediate layer is Si, B, and C, The high temperature resistant and anti-oxidation layer o...

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Abstract

The invention relates to a low-density carbon-tile surface oxidation-resistant coating capable of resisting the temperature of 1700 DEG C and a preparation method thereof, and belongs to the technical field of heat protective materials. For the requirement of heat protective systems of novel near-space aerocrafts and reusable launch vehicles for the heat protective materials with integrated functions of high-temperature resistance, light weight and heat insulation, the invention provides a low-density carbon-tile surface oxidation-resistant coating system capable of resisting the temperature of 1700 DEG C and a preparation method thereof. The coating is a composite coating with a gradient transition structure. The composite coating comprises an oxidation-resistant layer and a surface high-temperature-resistant oxidation-resistant layer, wherein the oxidation-resistant layer is formed by doping oxidation-resistant components such as Si, B, C and O and the like in a porous carbon-fiber skeleton; and the surface high-temperature-resistant oxidation-resistant layer is composed of compact M(M is Hf, Zr)B2-MoSi2 ultrahigh-temperature ceramic components.

Description

technical field [0001] The invention relates to an anti-oxidation coating on the surface of a 1700°C-resistant low-density carbon tile and a preparation method thereof, belonging to the technical field of thermal protection materials. Background technique [0002] Thermal protection materials are the key to the design and development of advanced thermal protection systems, whether in early weaponry or in the development of new power systems, re-entry vehicles, space exploration vehicles, near-space vehicles, and reusable vehicles. As a key technology, its performance and reliability play an irreplaceable role in the advancement and reliability of related power systems and aircraft. With the development of new near-space vehicle and reusable vehicle technology, the nose cone, leading edge and large local area of ​​the vehicle put forward higher requirements for the integration of high temperature resistance, light weight and heat insulation function. [0003] There are many ...

Claims

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Application Information

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IPC IPC(8): C04B41/89
CPCC04B41/52C04B41/89C04B41/5059C04B41/5071C04B41/507C04B41/522C04B41/5057C04B41/4527C04B41/4515
Inventor 徐林张大海李兴超宋永忠樊桢倪立勇
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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