Unlock instant, AI-driven research and patent intelligence for your innovation.

High-temperature-resistant antioxidant composite coating and preparation process thereof

A technology of composite coating and preparation process, which is applied in the field of high-temperature-resistant and anti-oxidation composite coating and its preparation, can solve the problems of reducing the protective performance of C/C composite materials, achieve good high-temperature resistance, tight adhesion, and improve high-temperature resistance Effect

Pending Publication Date: 2021-02-05
江西信达航科新材料科技有限公司
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the SiC coating prepared by the precursor dipping and cracking method is easy to peel off from the base material at high temperature, which reduces the protective performance of the C / C composite material at high temperature.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0025] 1. Treatment of C / C matrix materials. Sandpaper was used to remove the embossed part of the surface of the C / C composite material; the substrate was cleaned in alcohol and then dried in a muffle furnace at 60 °C.

[0026] 2. Dissolve ferrocene in ether, stir at room temperature, slowly add ammonia borane to it and stir for 0.5 hours, then place the mixture in a muffle furnace and dry at 35°C until the organic solvent is completely volatilized to obtain mixed powder 1 ; Wherein, the mass ratio of ferrocene, ether and ammonia borane is 0.5:5-10:30-50.

[0027] 3. Use spraying equipment to preset the mixed powder 1 on the surface of the C / C base material, and the thickness of the preset layer is 0.1 mm.

[0028] 4. Put the C / C composite material with a preset layer on the surface in the reaction kettle, feed inert gas, pressurize to 2Mpa, raise the temperature to 1500°C at 5°C / min, keep it for 2 hours; cool to 600°C with the furnace And heat preservation; wherein, the in...

specific Embodiment 2

[0036] 1. Treatment of C / C matrix materials. Sandpaper was used to remove the embossed part of the surface of the C / C composite material; the substrate was cleaned in alcohol and then dried in a muffle furnace at 80 °C.

[0037] 2. Dissolve ferrocene in ether, stir at room temperature, slowly add ammonia borane to it and stir for 2 hours, then place the mixture in a muffle furnace and dry at 40°C until the organic solvent is completely volatilized to obtain mixed powder 1 ; Wherein, the mass ratio of ferrocene, ether and ammonia borane is 2:10:50.

[0038] 3. Use spraying equipment to preset the mixed powder 1 on the surface of the C / C base material, and the thickness of the preset layer is 0.3mm.

[0039] 4. Put the C / C composite material with a preset layer on the surface in the reaction kettle, feed inert gas, pressurize to 3Mpa, raise the temperature to 1600°C at 10°C / min, keep it for 4 hours; cool to 850°C with the furnace And heat preservation; Among them, the inert ga...

specific Embodiment 3

[0047] 1. Treatment of C / C matrix materials. Sandpaper was used to remove the embossed part of the surface of the C / C composite material; the substrate was cleaned in alcohol and then dried in a muffle furnace at 70 °C.

[0048] 2. Dissolve ferrocene in ether, stir at room temperature, slowly add ammonia borane to it and stir for 1 hour, then place the mixture in a muffle furnace and dry at 38°C until the organic solvent is completely volatilized to obtain a mixed powder 1 ; Among them, the mass ratio of ferrocene, ether and ammonia borane is 1:8:40.

[0049]3. Use spraying equipment to preset the mixed powder 1 on the surface of the C / C base material, and the thickness of the preset layer is 0.2mm.

[0050] 4. Put the C / C composite material with a preset layer on the surface in the reaction kettle, feed inert gas, pressurize to 2.5Mpa, raise the temperature to 1550°C at 7°C / min, and keep it for 3 hours; cool to 750°C with the furnace ℃ and keep warm; Among them, the inert g...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation process of a high-temperature-resistant antioxidant composite coating, which comprises the following steps: uniformly mixing ammonia borane and ferrocene, sprayingthe mixture on the surface of a C / C matrix, and generating BN whiskers in a high-temperature high-pressure environment; and then introducing PCS into the reaction kettle, and continuously depositinga SiC coating on the surface of the C / C matrix under the conditions of high temperature and high pressure. Meanwhile, the invention further provides an application of the coating obtained through thepreparation process in a C / C matrix material, and the BN whiskers have good high-temperature resistance and play a good bridging role between the SiC coating and the C / C matrix, so that the SiC coating is attached to the surface of the C / C matrix more tightly and is not prone to stripping in a high-temperature oxidation environment. Besides, the SiC coating prepared by the method is simple in process and stable in performance, and the high-temperature resistance and oxidation resistance of the material are improved.

Description

technical field [0001] The invention belongs to the field of coating preparation, in particular to a high-temperature-resistant and anti-oxidation composite coating and a preparation process thereof. Background technique [0002] Due to its outstanding specific strength and specific modulus, C / C (carbon / carbon) composite materials have shown great application prospects in aerospace, weaponry, rockets and missiles and other fields. However, C / C materials begin to oxidize in an air environment of 400°C, which limits their application as high-temperature thermal structural materials. Preparing an anti-oxidation coating on the surface of C / C composites is one of the important methods to further improve the mechanical properties and high-temperature oxidation resistance of composites. At present, the coating materials used mainly include SiC, Si 3 N 4 , B 4 C and oxides and carbides of high-temperature refractory metals Zr, Hf, Ta, Cr. [Li Chunhua, Huang Kelong, Li Xiaodong,...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/89C04B35/83
CPCC04B41/009C04B41/89C04B41/52C04B35/83C04B41/4596C04B41/5064C04B41/4545C04B41/0072C04B41/5059C04B41/4535
Inventor 吴宝林侯振华吴迪
Owner 江西信达航科新材料科技有限公司