Microwave preparation method of anti-oxidation coating made of carbon-based material

A carbon-based material and anti-oxidation technology, which is applied in the field of preparation of high-temperature anti-oxidation coatings for C-based materials, can solve problems such as lack of product quality, complex equipment, and high cost, and achieve reduced equipment complexity, reduced operating costs, and prevention of substrate The effect of oxidation
CN101792331AInactive Publication Date: 2010-08-04UNIV OF SCI & TECH BEIJING
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
UNIV OF SCI & TECH BEIJING
Publication Date
2010-08-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a microwave preparation method of an anti-oxidation coating made of a carbon-based material, in particular to a substrate material which may be a carbon material, a C / C composite material or a C / SiC composite material. In the invention, slurry prepared by using Si compounds is coated on the carbon-based material, which is subjected to surface treatment, by a brush or immersion, then the carbon-based material is buried in graphite powder in a corundum crucible, the corundum crucible is placed in microwaves to be heated, the pre-heating, heating and temperature preservation are performed by stepwise regulating the power of a microwave oven, and thus, an anti-oxidation single-layer coating is obtained; on this basis, a composite coating of oxides, silicides and the like can be obtained. In the invention, microwaves act directly on the carbon-based material and the carbon-based material, after absorbing the microwaves, generate heat raises the temperature to a required temperature, so that the coating and a substrate are bonded and a protective coating with high protective performance is obtained; and as aluminum powder is added as a SiC sintering aid, the compaction of the SiC is promoted by the silicon aluminum alloy produced by the low-melting-point aluminum and part of molten silicon.
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Description

technical field

[0001] The invention relates to a preparation method of a C-based material high-temperature anti-oxidation coating, in particular to the surface treatment of a carbon material, a C / C composite material and a C / SiC composite material as a base material, and belongs to the surface technology field. Background technique

[0002] C-based composite materials, such as C / C composite materials, refer to composite materials composed of carbon matrix and carbon fiber, which have excellent high specific strength, ablation resistance, thermal shock resistance, low creep and high temperature performance stability, etc. It has a wide range of applications in aerospace and military technology and other fields. However, due to the rapid oxidation of C / C composite materials above 500 °C in the air, resulting in devastating damage, its application range is very limited. A lot of research has been done on the anti-oxidation methods of C / C composite materials at high temperature...

Claims

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