Anti-oxidation protection of pieces made from a composite material containing carbon

A technology of composite materials and parts, which is applied in the field of anti-oxidation protection of parts made of carbon-containing composite materials, and can solve problems such as complete problems, environmental problems, and toxicity

Active Publication Date: 2008-07-30
MESSIER BUGATTI INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, the application of PCS resin dissolved in xylene showed disadvantages
Xylene is flammable and toxic and evaporates rapidly during the drying process, thus causing environmental and global problems

Method used

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  • Anti-oxidation protection of pieces made from a composite material containing carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Samples of C / C composites were prepared by:

[0076] Overlap three carbon fiber unidirectional thin plates with an angle of ±60° between them, and combine the thin plates with each other through light needling to form a fiber ply;

[0077] superimposing the fibreboard layers formed and bonding the plies to each other by needling as they are superimposed to obtain a thickness of a few centimeters;

[0078] cutting ring-shaped rough products from the fibrous sheet prepared as described above; and

[0079] The crude product was densified by a pyrolytic carbon matrix formed by chemical vapor infiltration to achieve a relative density of about 1.73.

[0080] The formed samples were injected with an aqueous solution containing 0.5% by weight of a wetting agent (surfactant) sold under the name "Marlophen 89" by the German supplier Hüls. For this purpose, the sample is immersed in said solution, which is located in a tank associated with an ultrasonic generator to facilitate ...

Embodiment 2

[0117] Sample D of the C / C composite was provided with the same outer protective layer as Sample C in Example 1, but the phosphate based inner protection was omitted. Table II below shows the results (relative weight loss) obtained for samples C and D under two oxidizing environments.

[0118] Table II

[0119]

[0120] The results obtained show that the combination of internal and external protection shows a great improvement compared to external protection alone.

Embodiment 3、4 and 5

[0122] Sample E was obtained by providing sample A of Example 1 with an external protection obtained by the following steps:

[0123] - Using 36.4 parts by weight of "FFB33K" colloidal silica at a concentration of 30%, 4.8 parts of water, 12.2 parts of "Pyrex" glass powder and 46.6 parts of TiB supplied by the supplier Alfa Aesar 2 The aqueous composition, the mass used is about 17mg / cm 2 ;and

[0124] - Heat treatment in air at 90°C for 2 hours.

[0125] Sample F was obtained similar to sample E but heat treated at 700° C. in nitrogen for 1 hour.

[0126] Sample F similar to sample E but obtained by heat treatment in air at 800° C. for 15 minutes was obtained.

[0127] Table III below shows the results (relative weight loss) obtained after carrying out the oxidation tests on samples E, F and G.

[0128] Table III

[0129] Oxidation conditions

[0130] Industrially, a short heat treatment in air at 800°C is preferred.

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Abstract

The anti-oxidation protection of a composite material component, containing carbon and with open internal porosity, comprises : (A) impregnating the component by a liquid containing a phosphate compound, to the level of at least a part of the external surface; (B) applying, on this part of the external surface, a coating composition containing a colloidal suspension of a refractory oxide in water, a borosilicate compound in the form of a powder having cicatrizing properties and a powdered metal boride; (C) heat treating the coated component.

Description

technical field [0001] The present invention relates to the development of parts made of carbon-containing composite materials, i.e., for example, made of composite materials intensified by a matrix and wherein the carbon is present at least in the fiber reinforcement, or in the matrix, or even between the reinforcing fibers and the matrix. Parts made of fiber reinforcement materials in the mesophase provide antioxidant protection. A particular field of application of the invention is the protection of parts made of carbon / carbon (C / C) composites and in particular brake disks of aerospace vehicles from oxidation. Background technique [0002] In oxidizing media, the ability of the part to maintain good mechanical properties at elevated temperatures depends on providing effective protection against carbon oxidation. After it has been produced, the composite material inevitably has residual internal pores that allow the environmental media to enter the core of the material. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D69/02C04B41/89C04B41/50C04B35/83C04B41/52
CPCC04B35/632C04B35/83C04B41/009C04B41/52C04B41/89C04B2111/00362C04B2235/3217C04B2235/447C04B2235/5256C04B2235/5268C04B2235/608C04B2235/96F16D69/02F16D69/023F16D2250/0038C04B41/0072C04B41/5092C04B41/5022C04B41/507C04B41/5089C04B41/4961C04B41/522B05D3/02B05D1/18C04B38/00F16D65/12
Inventor N·尼古劳斯V·丰塔尔诺N·鲁萨瑞
Owner MESSIER BUGATTI INC
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