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A modified anti-oxidation composite phosphate coating and its preparation method and application

A technology of compound phosphate and anti-oxidation layer, applied in the field of anti-oxidation coating, long-term waterproof and moisture-proof, can solve the problems to be improved, achieve good anti-oxidation performance and anti-water and oxygen corrosion ability, strong moisture resistance, improve The effect of abrasion resistance and aging resistance

Active Publication Date: 2022-05-20
湖北瑞宇空天高新技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, the oxidation resistance of this type of coating needs to be improved, and the mechanism of oxidation resistance and interface bonding of the coating needs to be further studied

Method used

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  • A modified anti-oxidation composite phosphate coating and its preparation method and application
  • A modified anti-oxidation composite phosphate coating and its preparation method and application
  • A modified anti-oxidation composite phosphate coating and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The preparation method comprises the following steps:

[0040] Substrate preparation: cut 1.0cm×1.0cm×1.0cm C / C composite material, and use a grindstone to grind the corner edges into arc-shaped chamfers to relieve the stress concentration of the coating at the edges; use acetone and alcohol respectively Sonicate with deionized water for 60 minutes each, and dry in a constant temperature drying oven at 110°C.

[0041] Coupling layer preparation: Take an appropriate amount of titanate coupling agent, heat it in a water bath to a constant temperature of 60°C, and immerse the cleaned and dried composite material sample in TMC101 titanate coupling agent for immersion time After 8 hours, dry the titanate coupling agent on the surface at a constant temperature of 140°C to form a viscous coupling layer without fluidity; repeat the above dipping process until the thickness of the coupling layer is about 12 μm.

[0042] Preparation of anti-oxidation layer: Zn(PO 3 ) 2 / La(PO ...

Embodiment 2

[0044] The preparation method comprises the following steps:

[0045] Substrate preparation: cut 1.0cm×1.0cm×1.0cm C / C composite material, and use a grindstone to grind the corner edges into arc-shaped chamfers to relieve the stress concentration of the coating at the edges; use acetone and alcohol respectively Sonicate with deionized water for 60 minutes, and dry in a constant temperature drying oven at 110°C.

[0046] Coupling layer preparation: Take an appropriate amount of titanate coupling agent, heat it in a water bath to a constant temperature of 60°C, and immerse the cleaned and dried composite material sample in TMC201 titanate coupling agent for an immersion time of After 12 hours, dry the titanate coupling agent on the surface at a constant temperature of 140°C to form a viscous coupling layer without fluidity; repeat the above dipping process until the thickness of the coupling layer is about 12 μm.

[0047] Preparation of anti-oxidation layer: Zn(PO 3 ) 2 / La(P...

Embodiment 3

[0049] The preparation method comprises the following steps:

[0050] Substrate preparation: cut 1.0cm×1.0cm×1.0cm C / C composite material, and use a grindstone to grind the corner edges into arc-shaped chamfers to relieve the stress concentration of the coating at the edges; use acetone and alcohol respectively Sonicate with deionized water for 60 minutes each, and dry in a constant temperature drying oven at 110°C.

[0051] Coupling layer preparation: Take an appropriate amount of titanate coupling agent, heat it in a water bath to a constant temperature of 60°C, and immerse the cleaned and dried composite material sample in TMC201 titanate coupling agent for an immersion time of After 12 hours, dry the titanate coupling agent on the surface at a constant temperature of 140°C to form a viscous coupling layer without fluidity; repeat the above dipping process until the thickness of the coupling layer is about 18 μm.

[0052] Preparation of anti-oxidation layer: Zn(PO 3 ) 2 ...

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Abstract

A modified anti-oxidation composite phosphate coating and its preparation method and application, the coating includes a coupling layer arranged on the surface of the composite material matrix, and an anti-oxidation layer arranged on the surface of the coupling layer; the composition of the coupling layer includes Titanate coupling agent; the composition of the anti-oxidation layer includes metaphosphate, phosphate, boride, metal oxide. The matrix material of the composite material is a fiber reinforced ceramic matrix composite material or a fiber reinforced carbon matrix composite material. The invention can effectively enhance the anti-oxidation and anti-corrosion ability of the composite material in the coupled environment of wet oxygen and high temperature, so that the composite material can maintain stable performance for a long time in the medium and low temperature environment above 700 ° C, and has strong portability, and can be used for various Fiber-reinforced ceramic matrix or carbon matrix composites and components for anti-oxidation protection. The invention has simple process and strong applicability, and the prepared coating has strong moisture resistance and excellent thermal shock resistance, can be applied in water, and can be used for large-scale production of medium and low temperature thermal protection products composed of related composite materials and components.

Description

technical field [0001] The invention belongs to the technical field of thermal protection and anti-oxidation coatings, in particular to a long-acting waterproof, moisture-proof and anti-oxidation coating applied to composite material substrates and its preparation and application method. Background technique [0002] Fiber-reinforced composite material is a new high-performance material with the advantages of low density, small thermal expansion coefficient, high specific strength, high specific modulus, large heat capacity, excellent friction and wear properties, and good material designability. Ideal structural material for aerospace vehicles and rail transportation industries. However, for the carbon fiber, carbon interface or carbon matrix in most composite materials, when the temperature is higher than 400 °C, the composite material will be oxidized in the air, and the oxidation rate will increase with the increase of temperature. Oxidation significantly affects the fu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B41/89
CPCC04B35/66C04B41/52C04B41/89C04B41/009C04B41/46C04B41/4535C04B41/5015C04B41/5006C04B41/50C04B41/4543C04B35/80C04B35/565C04B35/83
Inventor 罗瑞盈全华锋
Owner 湖北瑞宇空天高新技术有限公司