Antioxidation/heat insulation integrated composite coating, polyimide composite coated with composite coating and preparation method of polyimide composite

A composite coating, polyimide technology, applied in the coating, metal material coating process, melt spraying and other directions, can solve the high temperature resistance and wear resistance of resin-based composite materials can not meet the needs of practical applications and other problems , to achieve the effect of improving long-term oxidation resistance, low thermal conductivity, and improving high temperature oxidation resistance

Active Publication Date: 2018-08-03
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the continuous improvement of the flight speed of aerospace vehicles, the high temperature resistance and wear resistance of resin matrix composites can no longer meet the needs of practical applications, and it is urgent to improve their high temperature resistance.

Method used

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  • Antioxidation/heat insulation integrated composite coating, polyimide composite coated with composite coating and preparation method of polyimide composite
  • Antioxidation/heat insulation integrated composite coating, polyimide composite coated with composite coating and preparation method of polyimide composite
  • Antioxidation/heat insulation integrated composite coating, polyimide composite coated with composite coating and preparation method of polyimide composite

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Such as figure 1 As shown, a polyimide composite material coated with a composite coating on the surface includes a polyimide composite substrate and a composite coating coated on the surface of the polyimide composite substrate. The base of the polyimide composite material is a quartz fiber reinforced polyimide resin matrix composite material, and the composite coating is an anti-oxidation / heat insulation integrated composite coating with a three-layer superimposed structure, starting from the surface of the polyimide composite material base followed by metal Al transition layer, Er 2 SiO 5 For the ceramic inner layer and La 2 Zr 2 o 7 Ceramic outer layer. Among them, the metal Al layer thickness is 31 μm, Er 2 SiO 5 70 μm thick, La 2 Zr 2 o 7 The thickness is 50 μm.

[0038] The preparation method of the polyimide composite material that surface is coated with composite coating in the present embodiment comprises the following steps:

[0039] (1) High-temp...

Embodiment 2

[0080] Such as figure 1 As shown, a polyimide composite material coated with a composite coating on the surface includes a polyimide composite substrate and a composite coating coated on the surface of the polyimide composite substrate. The base of the polyimide composite material is a quartz fiber reinforced polyimide resin matrix composite material, and the composite coating is an anti-oxidation / heat insulation integrated composite coating with a three-layer superimposed structure, starting from the surface of the polyimide composite material base followed by metal Al transition layer, Yb 2 SiO 5 For ceramic inner layer with Nd 2 Zr 2 o 7 Ceramic outer layer. Among them, the thickness of the metal Al layer is 42 μm, and the Yb 2 SiO 5 Thickness 55μm, Nd 2 Zr 2 o 7 The thickness is 120 μm.

[0081] The preparation method of the polyimide composite material that surface is coated with composite coating in the present embodiment is as follows:

[0082] (1) High-temp...

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Abstract

The invention discloses an antioxidation/heat insulation integrated composite coating which is of a multilayer stacking structure and sequentially comprises a metal transition layer, a rare-earth silicate layer and a rare-earth zirconate layer from inside to outside. The invention further provides a polyimide composite coated with the composite coating. The polyimide composite comprises a fiber-reinforced polyamide resin matrix composite and a composite coating which is applied to the surface of the fiber-reinforced polyamide resin matrix composite; and the composite coating is the antioxidation/heat insulation integrated composite coating. The invention also provides a preparation method of the polyimide composite coated with the composite coating correspondingly. With the adoption of theantioxidation/heat insulation integrated composite coating, the long-time high temperature oxidation resistance and the short-time high temperature ablation resistance of the polyimide composite coated with the composite coating can be improved effectively, so that the application scope of the polyimide composite coated with the composite coating in the field of aviation and aerospace crafts is widened.

Description

technical field [0001] The invention belongs to the field of surface coating modification, and in particular relates to a composite coating, a polyimide composite material coated with the composite coating on the surface and a preparation method thereof. Background technique [0002] Polyimide matrix composites (Polyimide matrix composites, PiMCs) is currently the highest temperature-resistant resin-based composite material, because of its low density, good fatigue fracture resistance, corrosion resistance, high specific strength and specific stiffness , and performance can be designed and other advantages to be used to replace some metal materials. However, with the continuous improvement of the flight speed of aerospace vehicles, the high temperature resistance and wear resistance of resin matrix composites can no longer meet the needs of practical applications, and it is urgent to improve their high temperature resistance. [0003] Compared with the development of new hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/11C23C4/129C23C4/134
CPCC23C4/11C23C4/129C23C4/134
Inventor 黄文质刘海韬甘霞云黄丽华
Owner NAT UNIV OF DEFENSE TECH
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