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An anti-oxidation coating on the surface of a low-density carbon tile resistant to 1300-1500 ° C and its preparation method

An anti-oxidation coating and low-density technology, applied in the direction of heating inorganic powder coating, etc., can solve the problems of poor heat insulation performance, low-density carbon tile density and low heat insulation performance, etc., and achieve good oxidation resistance, simple method, Effect of Aerobic Diffusion Barrier Capacity

Active Publication Date: 2019-01-25
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

[0003] Among the existing relatively mature thermal protection material families, anti-oxidation C / C, C / SiC, and UHTCs have a service temperature exceeding 1650°C in a long-term oxidation environment, but they are all high-density materials with a density greater than 1.6g / cm 3 , the thermal insulation performance is poor; the density of flexible thermal insulation felt is 0.1-0.2g / cm 3 , the use temperature limit is only about 600°C, and the use of higher temperature stability is limited by the performance of raw materials; the density of ceramic insulation tiles is 0.2-0.4g / cm 3 , the mature use temperature range is only 1200°C, and the higher temperature ceramic insulation tile technology has not yet broken through
[0004] Low-density carbon tiles have low density, good thermal insulation performance, and excellent high-temperature structural reliability. They have good application potential in integrated lightweight anti-insulation material systems. However, the oxidation limit begins in an oxygen environment above 400°C. In order to be widely used, it is necessary to solve the problem of its anti-oxidation

Method used

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  • An anti-oxidation coating on the surface of a low-density carbon tile resistant to 1300-1500 ° C and its preparation method
  • An anti-oxidation coating on the surface of a low-density carbon tile resistant to 1300-1500 ° C and its preparation method
  • An anti-oxidation coating on the surface of a low-density carbon tile resistant to 1300-1500 ° C and its preparation method

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Experimental program
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Effect test

preparation example Construction

[0035] A method for preparing an anti-oxidation coating on the surface of a low-density carbon tile, using Si-C, Si-B-C, Zr-Si-C, or Zr-Si-B-C and other ceramic precursors as carriers, through multiple brushing, Drying and pyrolysis to obtain an anti-oxidation base coating with a certain depth on the surface, and then obtain a surface sealing layer by high-temperature pre-oxidation smoothing treatment in an air atmosphere or by directly brushing a glassy oxide film, and finally obtain an anti-oxidation coating. Low density carbon tile material. The concrete steps of this method 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 the ceramic precursor to brush the low-density carbon tile base material obtained in step 1) for 3-4 times, and dry it once after each brushing to obtain u...

Embodiment 1

[0051] An anti-oxidation coating on the surface of a low-density carbon tile resistant to 1300-1500 °C, the anti-oxidation coating includes an anti-oxidation base coating and a surface sealing layer, wherein the anti-oxidation base coating is a refractory metal compound, and the refractory The metal compound enters the lowest position inside the low-density carbon tile to the top of the low-density carbon tile, which is the position on the surface of the low-density carbon tile, and its content increases successively, such as figure 1 shown; the thickness of the refractory metal compound is 2.1-2.6mm, and the elemental composition of the refractory metal compound includes Si, B and C; the surface sealing layer is a glass phase composed of Si, B and O, The thickness of the surface sealing layer is 35-50 μm;

[0052] Aiming at the 100mm level flat sample, an anti-oxidation coating on the surface of low-density carbon tiles was designed and prepared, which includes an anti-oxidat...

Embodiment 2

[0062] An anti-oxidation coating on the surface of a low-density carbon tile resistant to 1300-1500 °C, the anti-oxidation coating includes an anti-oxidation base coating and a surface sealing layer, wherein the anti-oxidation base coating is a refractory metal compound, and the refractory The metal compound enters the lowest position inside 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 thickness of the refractory metal compound is 2.0-2.5mm, and the refractory metal The element composition of the compound includes Si and C; the surface sealing layer is a glass phase composed of Si and O, and the thickness of the surface sealing layer is 45-50 μm;

[0063] Aiming at the 100mm level flat sample, an anti-oxidation coating on the surface of low-density carbon tiles was designed and prepared, which includes an anti-oxidation base coating and a su...

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Abstract

The invention relates to a 1300-1500 DEG C-resistant and low-density carbon tile surface anti-oxidation coating and a production method thereof, and especially relates to an anti-oxidation coating used for low-density carbon tiles, and a production method of the coating. The anti-oxidation coating is a composite system composed of Zr, Si, B, C and O, and is produced through brushing cracking and pre-oxidation technologies. The coating has the advantages of excellent high temperature resistance, excellent heat insulation performance, simple production process and short production period, and belongs to the technical field of heat protection materials. The 1300-1500 DEG C-resistant and low-density carbon tile surface anti-oxidation coating and the production method thereof are provided against demands of a novel near space aerocraft and reuse of a vehicle heat protection system for a high temperature-resistance, light-weighting and heat-insulation function integrated heat protection material. The coating is the composite system composed of Zr, Si, B, C and O, is produced through brushing cracking and pre-oxidation technologies and has the advantages of excellent high temperature resistance, excellent heat insulation performance, simple production process and short production period.

Description

technical field [0001] The invention relates to an anti-oxidation coating on the surface of low-density carbon tiles resistant to 1300-1500°C and a preparation method thereof, in particular to an anti-oxidation coating for low-density carbon tiles and a preparation method thereof. The anti-oxidation coating is Zr, The composite system composed of Si, B, C and O components is prepared by brushing cracking and pre-oxidation methods. The material has excellent high temperature resistance and heat insulation performance. The preparation process is simple and the cycle is short. It belongs to the thermal protection material technology field. Background technique [0002] Thermal protection materials are key materials for the design and development of advanced thermal protection systems. They play an irreplaceable role in new power systems and re-entry vehicles, space exploration vehicles, near-space vehicles, and reusable vehicles. Their performance and reliability It is one of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/08C04B41/89
CPCC04B41/52C04B41/89C04B41/5059C04B41/5058C04B41/522C04B41/5071C04B41/5057C04B41/507C04B41/5022
Inventor 徐林戴志峰李炜师建军张大海
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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