Thermal protection composite coating and manufacturing method thereof

A composite coating, thermal protection technology

Active Publication Date: 2022-04-29
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the purposes of the present invention is to obtain a thermal protective composite coating. By improving the structural design of the composite coating, a three-layer structure of heat-resistant layer + heat-conducting layer + heat-resistant layer is obtained, which effectively solves the problem of thermal protective coating. The problem of heat resistance reduction caused by local high-temperature aggregation of materials in the actual application process can effectively improve the stability and reliability of high-temperature application structures

Method used

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  • Thermal protection composite coating and manufacturing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048]The powder mixed with 70% zirconia and 30% metal bonding phase is pre-placed on the surface of the metal matrix by plasma spraying, and then the treatment of 1100 °C insulation for 20 min in the vacuum heating furnace is carried out to obtain the first ceramic heat-resistant layer; subsequently, the slurry brush prepared by 25% graphene, 50% silicon carbide and 25% water glass is fully mixed to the surface of the first ceramic heat-resistant layer, and then after curing at room temperature, it is placed into an inert gas shielding furnace for 900 °C insulation for 30 min treatment to form a graphene thermal conductive layer Finally, the slurry brush prepared by the full mix of 55% zirconia, 30% quartz fiber and 15% aluminum dihydrogen phosphate was applied to the surface of the thermal conductive layer, and then cured at room temperature, it was put into an inert gas shielding furnace for 800 °C insulation for 30 min treatment, and a second ceramic heat-resistant layer was ...

Embodiment 2

[0050] The powder mixed with 80% alumina and 20% metal bonding phase was pre-placed on the surface of the metal matrix by plasma spraying, and then the treatment of 900 °C insulation for 20 min in the vacuum heating furnace was carried out to obtain the first ceramic heat-resistant layer; subsequently, the slurry brush prepared by 25% graphene, 50% silicon carbide and 25% water glass was fully mixed to the surface of the first ceramic heat-resistant layer, and then after curing at room temperature, it was placed in an inert gas protection furnace for 900 °C insulation for 30 min to form a graphene thermal conductive layer Finally, the slurry brush prepared by the full mix of 75% alumina, 10% silicon carbide fiber and 15% aluminum dihydrogen phosphate is applied to the surface of the thermal conductive layer, and then cured at room temperature, it is put into an inert gas shielding furnace for 800 °C insulation for 30min treatment, and a second ceramic heat-resistant layer is obtai...

Embodiment 3

[0052] The slurry mixed with 80% silicon oxide, 15% metal bonding phase and 5% water glass is pre-placed on the surface of the metal matrix by brushing, and after curing at room temperature, the first ceramic heat-resistant layer is obtained by 850 °C insulation in an inert gas protection furnace for 20 min treatment, and subsequently, the slurry brush prepared by 25% graphene, 50% silicon carbide, and 25% water glass is fully mixed to the surface of the first ceramic heat-resistant layer, and then after curing at room temperature, it is placed into the inert gas protection furnace for 800 °C insulation for 30 min treatment. Finally, the slurry brush prepared by the full mixing of 75% silica, 10% quartz fiber and 15% aluminum dihydrogen phosphate is applied to the surface of the thermal conductive layer, and then cured at room temperature, it is placed in an inert gas shielding furnace for 800 °C insulation for 30 min treatment, and a second ceramic heat-resistant layer is obtaine...

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Abstract

The invention relates to the technical field of heat-resistant protection of high-temperature structural parts, in particular to a structural design and forming manufacturing method of a thermal protection composite coating. The thermal protection composite coating is composed of a plurality of coating layers formed by alternately arranging ceramic heat-resistant layers and graphene heat-conducting layers, and the thickness is d. The first ceramic heat-resistant layer (1) is composed of ceramic powder and a binding phase, and the second ceramic heat-resistant layer (2) is composed of graphene heat-conducting layers. The middle graphene heat-conducting layer (3) is composed of graphene nanoparticles, ceramic powder and a binding phase, and the second ceramic heat-resisting layer (2) is composed of ceramic powder, ceramic short fibers and a binding phase; each coating layer is prepared through brazing, spraying and heat treatment. According to the three-layer structural form of the heat-resistant layer, the heat-conducting layer and the heat-resistant layer, the problem that the heat resistance of a thermal protection coating material is reduced due to local high-temperature aggregation in the actual application process is effectively solved, so that the stability and the reliability of a high-temperature application structure are effectively improved.

Description

Technical field [0001] The present invention relates to the field of heat protection technology for high-temperature structural parts, in particular to a thermal protection composite coating and a manufacturing method thereof, which can solve the problem of heat resistance and low heat insulation and low binding strength in high-temperature application structures. Background [0002] The thermal protective coating applied at this stage is generally an oxide ceramic coating with a low thermal conductivity or a composite coating composed of high melting point metal and non-metal, and the coating body has high temperature resistance and can meet the requirements of high temperature application under certain working conditions. [0003] However, although the above-mentioned coating materials have excellent low thermal conductivity and high melting point characteristics, in a certain period of time in the high temperature environment, there will also be local high temperature aggrega...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06C23C4/18C23C4/134C23C24/08C23C28/00C23C4/129C23C24/04C23C4/10
CPCC23C4/06C23C4/18C23C4/134C23C24/08C23C28/324C23C28/34C23C4/129C23C24/04C23C4/10
Inventor 赵磊何子君祁焱梅俊徐立红郭世海赵栋梁
Owner CENT IRON & STEEL RES INST
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