Anti-ablation ZrC/SiC multilayer alternate coating and preparation method thereof

An anti-ablation and coating technology, applied in coating, metal material coating process, gaseous chemical plating, etc., can solve the problems of coating failure, difficulty in resisting high scouring force, etc., to protect the substrate and realize thermal stress Matching and reducing the effect of penetrating cracks

Pending Publication Date: 2021-07-13
NORTHWESTERN POLYTECHNICAL UNIV
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at 4.2MW / m 2 Under the high flow rate, the molten oxide layer formed by the introduction of SiC is difficult to withstand high scouring force, and the coating fails

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Anti-ablation ZrC/SiC multilayer alternate coating and preparation method thereof
  • Anti-ablation ZrC/SiC multilayer alternate coating and preparation method thereof
  • Anti-ablation ZrC/SiC multilayer alternate coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1) After the processed C / C composite material is polished with 200, 400, and 800 sandpaper in sequence, it is ultrasonically cleaned in anhydrous ethanol, and then dried in an oven.

[0042] 2) Hang the C / C composite material dried in 1) vertically in a chemical vapor deposition furnace. Install the upper and lower flanges of the deposition furnace, turn on the vacuum pump, and pump the pressure in the furnace to 2000Pa. Turn on the heating switch, and raise the temperature of the deposition furnace to 1050° C. at a heating rate of 8° C. / min. During the heating process, the inert gas Ar was passed into the furnace at 400ml / min as the protective gas.

[0043] 3) After the deposition furnace finishes heating up, adjust the Ar flow rate to 500ml / min, and feed H into the furnace 2 and MTS, the flow rates are 3500ml / min and 2ml / min respectively. Adjust the suction force of the vacuum pump, control the pressure in the furnace to 5000 Pa, and deposit for 3 hours.

[0044] ...

Embodiment 2

[0050] 1) After the processed C / C composite material is polished with 200, 400, and 800 sandpaper in sequence, it is ultrasonically cleaned in anhydrous ethanol, and then dried in an oven.

[0051] 2) Hang the C / C composite material dried in 1) vertically in a chemical vapor deposition furnace. Install the upper and lower flanges of the deposition furnace, turn on the vacuum pump, and pump the pressure in the furnace to 2000Pa. Turn on the heating switch, and raise the temperature of the deposition furnace to 1250° C. at a heating rate of 10° C. / min. During the heating process, the inert gas Ar was passed into the furnace at 500ml / min as the protective gas.

[0052] 3) After the deposition furnace finishes heating up, adjust the Ar flow rate to 600ml / min, and feed H into the furnace 2 and MTS, the flow rates are 4500ml / min and 4ml / min respectively. Adjust the suction force of the vacuum pump, control the pressure in the furnace to 8000Pa, and deposit for 3.5h.

[0053] 4) ...

Embodiment 3

[0059] 1) After the processed C / C composite material is polished with 200, 400, and 800 sandpaper in sequence, it is ultrasonically cleaned in anhydrous ethanol, and then dried in an oven.

[0060] 2) Hang the C / C composite material dried in 1) vertically in a chemical vapor deposition furnace. Install the upper and lower flanges of the deposition furnace, turn on the vacuum pump, and pump the pressure in the furnace to 2000Pa. Turn on the heating switch, and raise the temperature of the deposition furnace to 1350° C. at a heating rate of 12° C. / min. During the heating process, the inert gas Ar was passed into the furnace at 600ml / min as the protective gas.

[0061] 3) After the deposition furnace finishes heating up, adjust the Ar flow rate to 800ml / min, and feed H into the furnace 2 and MTS, the flow rates are 5000ml / min and 5ml / min respectively. Adjust the suction force of the vacuum pump, control the pressure in the furnace to 10000 Pa, and deposit for 4 hours.

[0062...

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
melting pointaaaaaaaaaa
melting pointaaaaaaaaaa
Login to view more

Abstract

The invention relates to an anti-ablation ZrC/SiC multilayer alternate coating and a preparation method. The thermal expansion difference between coatings and a substrate and among coatings can be effectively regulated and controlled through multilayer alternation of SiC and ZrC, meanwhile, the designability of the multi-layer alternate coatings is high, and thermal stress matching of the coatings and the substrate can be better achieved by adjusting the thickness and the number of the SiC layers and the ZrC layers, on the other hand, after the multiple layers are compounded, a large number of interlayer interfaces can exist, cracks can be deflected or terminated in the expansion process, and therefore generation of penetrating cracks is reduced. In conclusion, according to the anti-ablation ZrC/SiC multilayer alternate coating and the preparation method thereof, the coatings provided by the invention can effectively improve the ablation resistance, and the substrate can be better protected.

Description

technical field [0001] The invention belongs to the field of coating preparation, and relates to an anti-ablation ZrC / SiC multilayer alternating coating and a preparation method. Background technique [0002] Carbon / carbon (C / C) composites have the characteristics of low density, excellent high-temperature and ultra-high-temperature mechanical properties, good thermal stability, and strong chemical resistance, making them ideal candidates for aerospace thermal structural components. However, C / C composites begin to oxidize in an aerobic environment above 400°C, and ablate at higher temperatures and high-velocity gas, which seriously restricts their reliable application in high-temperature extreme environments. [0003] The preparation of anti-oxidation and ablation ceramic coatings on the surface of C / C composites is an internationally recognized inevitable way to solve this problem. The melting point of ZrC ceramics is as high as 3540 °C, and its oxide ZrO 2 Its melting p...

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): C23C16/32C23C16/02C23C16/52
CPCC23C16/325C23C16/0254C23C16/52C23C16/32
Inventor 李贺军李博姚西媛张雨雷
Owner NORTHWESTERN POLYTECHNICAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap