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Method for preventing oxidization of carbon-carbon composite material

A carbon composite material and material technology, which is applied in chemical instruments and methods, compositions for inhibiting chemical changes, friction linings, etc. Anti-oxidation ability, simple implementation process, effect of preventing diffusion and penetration

Inactive Publication Date: 2007-10-03
XIAN CHAOMA SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these two patent applications have improved the oxidation resistance and moisture resistance of the C / C composite brake disc to varying degrees, the process is relatively complicated, and the oxidation resistance and moisture resistance at high temperatures still need to be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The following components (percentage by weight): 50% of water, 5% of aluminum chloride, 5% of zinc chloride, 10% of aluminum phosphate, 5% of zinc phosphate, 24% of phosphoric acid, 1% of silane surfactant, mixed and stirred evenly , brushing on the surface of the carbon / carbon composite material, or dipping the carbon / carbon composite material in the water phase mixture, and then heat treatment at high temperature, the temperature is 800°C, so that the solid components are deposited from the water phase solution to the surface and pores of carbon / carbon composites. The above carbon / carbon composite material surface brushing process is carried out under atmospheric pressure, and the carbon / carbon composite material water phase mixture impregnation treatment process is carried out under vacuum.

Embodiment 2

[0018] The following components (percentage by weight): 30% of water, 5% of aluminum chloride, 5% of zinc chloride, 15% of aluminum phosphate, 5% of zinc phosphate, and 40% of phosphoric acid, mixed and stirred evenly, in the carbon / carbon composite material The surface is brushed, or the carbon / carbon composite material is dipped in the water phase mixture, and then heat-treated at a high temperature, the temperature is 900°C, so that the solid components are deposited from the water phase solution onto the carbon / carbon composite material. surface and pores. The above carbon / carbon composite material surface brushing process is carried out under atmospheric pressure, and the carbon / carbon composite material water phase mixture impregnation treatment process is carried out under vacuum.

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Abstract

The invention is a method to prevent carbon / carbon composite oxidizing, and its character: it adopts a water-phase mixture able to permeate carbon / carbon composite and containing the following components in weight percent: water 30%-50%, aluminum chloride 5%-10%, zinc chloride 5%-10%, aluminum phosphate 10%-20%, zinc phosphate 5%-10%, phosphoric acid 15%-40%; besides, can also include surface-active agent 1%-5%, uniformly mixing and coating the mixture on the surface of carbon / carbon composite or dipping the carbon / carbon composite in the mixture, then using high-temperature thermal processing to make the solid components deposit on to the surface and holes of the carbon / carbon composite from the water-phase solution. It can reduce hole rate and enhance density of the carbon / carbon composite, enhance high-temperature antioxidation ability of the carbon / carbon composite by a large margin and that on conditions of sea water or salt mist pollution and moisture and hotness.

Description

Technical field [0001] The present invention relates to methods of preventing oxidation of carbon / carbon composite materials. Background technique [0002] C / C composite material has strong specific ratio, high specific modulus, high temperature resistance, thermal shock resistance, anti-sticking and seizure, and excellent friction and wear performance. It is the best material for making brake discs. It is different from traditional metal-based aircraft. Compared with brake materials, C / C composite materials have excellent high-temperature mechanical properties, good thermal conductivity, large heat capacity, small thermal expansion coefficient, low density, light weight, good friction and wear performance, and long service life. They are used to manufacture aircraft brake pairs. It has special technical and economic advantages, and has a tendency to gradually replace metal-based aircraft brake materials. However, C / C composite materials generally have 10% to 15% of pores, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D69/00C09K15/02
Inventor 彭志刚肖志超苏君明孟凡才
Owner XIAN CHAOMA SCI TECH