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Anti-oxidation coating and preparation method thereof

An anti-oxidation and coating technology, applied in the field of preparation of anti-oxidative coatings, can solve the problems of high coating preparation temperature, difficult to control coating thickness and composition, etc., and achieve excellent anti-oxidation performance and excellent high-temperature anti-oxidation. Ability, wide application effect

Active Publication Date: 2010-10-20
嘉兴睿创新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The coating prepared by the embedding process is dense and has excellent oxidation resistance, but there are also disadvantages such as difficult control of coating thickness and composition, and high coating preparation temperature.

Method used

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  • Anti-oxidation coating and preparation method thereof
  • Anti-oxidation coating and preparation method thereof
  • Anti-oxidation coating and preparation method thereof

Examples

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Effect test

example 1

[0027] Use thermosetting phenolic resin as binder and carbon source, and use absolute ethanol as solvent to make MoSi2 into a slurry. The mass ratio of MoSi2 to thermosetting phenolic resin is 2.5:1, and the solid content of the slurry is ~1g / ml. The method of coating is to coat MoSi2 particles on the Cf / SiC composite material, after curing and drying, the Cf / SiC composite material coated with MoSi2 slurry is subjected to high temperature treatment (1000°C), and then the slurry is coated with a pre-coating layer. Such as figure 2 and image 3 shown. Then put the processed sample into a vacuum carbon tube furnace, use silicon powder for experiment as the silicon source, control the reaction temperature at 1500°C, and the reaction time is 1.5 hours, and prepare a MoSi2-SiC-Si coating with a thickness of ~ 120μm, the volume ratio of MoSi2 to SiC is about 3:1, and the content of free Si is about 5vol% of the coating. Such as Figure 4 and Figure 5 shown.

example 2

[0029]Use thermosetting phenolic resin as binder and carbon source, and use absolute ethanol as solvent to make Mo into a slurry. The mass ratio of Mo to thermosetting phenolic resin is 3.5:1, and the solid content of the slurry is ~2g / ml. The method of coating is to coat Mo particles on the Cf / SiC composite material, and after curing and drying, perform high temperature treatment (1000° C.) on the Cf / SiC composite material coated with Mo slurry, and then coat the slurry with a precoat. Then put the processed sample into a vacuum carbon tube furnace, use silicon powder for the experiment as the silicon source, control the reaction temperature at 1500 ° C, and the reaction time is 2 hours, and prepare a MoSi2-(Mo5Si3)-SiC-Si coating. Its thickness is ~120μm, the volume ratio of MoSi2-(Mo5Si3) to SiC is about 3:1, and the free Si content is about 5vol% of the coating.

example 3

[0031] Use thermosetting phenolic resin as binder and carbon source, and use water as solvent to prepare WSi2 into a slurry. The mass ratio of WSi2 to thermosetting phenolic resin is 4:1, and the solid content of the slurry is ~1.5g / ml. The coating method is to coat WSi2 particles on the Cf / SiC composite material, and after curing and drying, perform high temperature treatment (1000°C) on the Cf / SiC composite material coated with WSi2 slurry, and then coat the slurry with a precoat. Then put the processed sample into a vacuum carbon tube furnace, use silicon powder for experiment as the silicon source, control the reaction temperature at 1500°C, and the reaction time is 1.5 hours, and prepare a WSi2-SiC-Si coating with a thickness of ~ 120μm, the volume ratio of WSi2 and SiC is about 3:1, and the content of free Si is about 5vol% of the coating.

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Abstract

The invention relates to a preparation method of an anti-oxidation coating, which belongs to the field of coating material preparation. In the invention, a composite material is taken as a basal body, and the coating comprises the following main components: a SiC phase, a free Si phase and an M phase, wherein the M phase is an MoSi2, WSi2 and TaSi2 single ceramic phase or a multiple ceramic mixing phase; the thickness of the coating is about 20mu m to 600mu m; the coating adopts a process for preparing the coating by a slurry coating-liquid phase ihrigizing in-suit reaction method; the coating system has wide application range, and contains the whole Si ceramic coatings; and the invention effectively control the thickness and the components of the coating by means of the slurry solid content and slurry coating frequency, thereby meeting the in-service use requirements.

Description

technical field [0001] The invention relates to a preparation method of an anti-oxidation coating and belongs to the field of preparation of coating materials. Background technique [0002] Fiber-reinforced silicon carbide-based composites have the characteristics of low thermal expansion coefficient, high thermal conductivity, high gasification temperature, and good fracture toughness, wear resistance and thermal shock resistance. At the same time, the introduction of fibers can effectively prevent crack propagation in the ceramic matrix , which solves the problem of high brittleness of a single ceramic material, and also overcomes the shortcoming of easy oxidation of composite materials. It is a new type of advanced composite material with broad application prospects. [0003] At present, due to the difference in thermal expansion coefficient between the fiber and the matrix of fiber-reinforced silicon carbide-based composite materials, a large number of microcracks will i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/87
Inventor 吴定星董绍明高乐王震周海军
Owner 嘉兴睿创新材料有限公司
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