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Preparation method of carbon material high-temperature oxidation-resistant coating by coating and sintering

A high-temperature anti-oxidation and carbonaceous material technology, which is applied in the field of inorganic coating materials for oxidation protection of carbon materials, can solve complex procedures, poor uniformity and composition controllability of anti-oxidation coatings, and poor interlayer bonding within the coating and other problems, to achieve the effect of reducing the preparation process, shortening the preparation cycle, and strong binding force

Active Publication Date: 2014-12-10
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

[0005] The object of the present invention is to provide a coating and sintering preparation method of high-temperature (temperature above 1500°C) anti-oxidation coating for carbonaceous materials, which adopts the coating and sintering method to prepare SiC / SiC-MoSi of carbonaceous materials 2 The anti-oxidation composite coating solves the existing two-step method with complicated procedures, long preparation period, poor interlayer bonding force inside the coating, low utilization rate of materials, and poor uniformity and composition controllability of the anti-oxidation coating. poor disadvantage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A coating and sintering preparation method of a carbonaceous material high-temperature oxidation-resistant coating according to the present invention, with a density of 1.9g / cm 3 The carbon / carbon composite material is used as the substrate, and the surface is cleaned and dried for later use; it includes the following steps:

[0025] (1) Brush slurry I on the cleaned carbon / carbon composite surface; the slurry I includes silicone resin and Si powder, and the mass ratio of silicone resin and Si powder is 1:1. The surface of the carbon / carbon composite material was brushed with slurry I with a thickness of 1 mm, and dried in a drying oven at 120 °C for 1 h.

[0026] (2) Then continue to brush the slurry II on the surface of the carbon / carbon composite material of the brushing slurry I obtained in step (1); the slurry II includes silicone resin, Si powder and Mo powder, silicone resin: Si Powder:Mo powder mass ratio is 3:3:2. Brush the reaction slurry II with a thickness...

Embodiment 2

[0033] A coating and sintering preparation method of a carbonaceous material high-temperature anti-oxidation coating according to the present invention, with a density of 1.7g / cm 3 The high-strength graphite is used as the substrate, and the surface is cleaned and dried for later use; it includes the following steps:

[0034] (1) Brush slurry I on the cleaned graphite surface; the slurry I includes phenolic resin and Si powder, and the mass ratio of phenolic resin and Si powder is 1:2. Brush the slurry I on the surface of the graphite material, and dry it in a drying oven at 120°C for 1 hour. Paste I finally produces a SiC base layer.

[0035](2) then continue brushing slurry II on the graphite material surface of brushing slurry I of step (1) gained; Described slurry II comprises phenolic resin, Si powder and Mo powder, phenolic resin: Si powder: Mo The mass ratio of powder is 3:5:1.5. Brush the reaction slurry II on the surface of the graphite material, and then dry it in...

Embodiment 3

[0042] A coating and sintering preparation method of a carbonaceous material high-temperature oxidation-resistant coating according to the present invention, with a density of 1.9g / cm 3 The carbon / carbon composite material is used as the substrate, and the surface is cleaned and dried for later use; it includes the following steps:

[0043] (1) Brush slurry I on the cleaned carbon / carbon composite surface; the slurry I includes phenolic resin and Si powder, and the mass ratio of phenolic resin and Si powder is 1:1.

[0044] (2) Continue brushing slurry II on the surface of the carbon / carbon composite material of the brushing slurry I obtained in step (1) then; Described slurry II includes phenolic resin, Si powder and Mo powder, phenolic resin: Si The mass ratio of powder:Mo powder is 3:5:2.

[0045] (3) Sintering the carbon / carbon composite materials of the brushing slurry I and slurry II obtained in step (2) at a high temperature of 1800° C. for 2 hours, and then naturally ...

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Abstract

The invention provides a preparation method of a carbon material high-temperature oxidation-resistant coating by coating and sintering. The method comprises the following steps: (1) brushing a slurry I on a cleaned carbon material surface; (2) continuing brushing a slurry II on the carbon material surface brushed with the slurry I in the step (1); (3) carrying out high-temperature sintering on the carbon material brushed with the slurry I and slurry II at 1300-1800 DEG C for 2-3 hours, and naturally cooling to room temperature; (4) repeating the brushing and sintering in the step (1) to step (3) 1-3 times; (5) carrying out seal treatment on the coating surface of the carbon material obtained in the step (4) by using ethyl orthosilicate; and (6) repeating the ethyl orthosilicate brushing and drying in the step (5) 1-4 times to obtain a seal layer on the coating surface of the carbon material. The method is simple to operate, has the advantages of short preparation period and high material utilization ratio, and can obviously lower the coating preparation cost.

Description

technical field [0001] The invention belongs to the field of inorganic coating materials for oxidation protection of carbon materials, and in particular relates to a coating and sintering preparation method of a high-temperature anti-oxidation coating of carbon materials. Background technique [0002] Carbon materials have excellent high-temperature mechanical properties and good thermal shock resistance, and are widely used in aerospace and other fields. However, carbon materials begin to undergo significant oxidation reactions in an oxidizing environment above 500 °C, and their properties are fatally damaged. Coating an anti-oxidation coating on the surface of carbon materials is the main method to solve the oxidation of carbon materials at high temperatures (especially above 1200 °C). [0003] Carbonaceous material anti-oxidation coating SiC / SiC-MoSi 2 The system has good anti-oxidation properties, the reason is that SiC and carbonaceous materials have good chemical and...

Claims

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Application Information

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IPC IPC(8): C04B41/89
Inventor 吴宁宁李同起张中伟焦星剑李钰梅刘风亮张震俸翔
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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