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nanowire toughened zrb 2 -Preparation method of zrc-sic anti-oxidation coating

A nanowire toughening and anti-oxidation coating technology, applied in the field of ultra-high temperature anti-oxidation coating, can solve the problems of easy oxidation, low density, coating peeling, delamination, etc., achieving simple operation, wide application range, equipment less demanding effects

Active Publication Date: 2022-02-15
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] C / C, C / SiC or carbon fiber toughened ultra-high temperature ceramic matrix composites have low density, high strength and good temperature resistance, but their shortcomings of easy oxidation in high temperature For the application and promotion in the field of aerospace, the preparation of anti-oxidation coating on the surface is the most direct and effective method to improve its high-temperature and long-term anti-oxidation performance
Patent application CN201710293168.X prepared ZrB by plasma spraying 2 -SiC-ZrC coating, the coating has a uniform dispersed distribution structure of each component, but there is no nanowire toughening in the coating, and the coatings are all prepared on the ZrC-SiC composite ceramic substrate, when prepared on other substrates , due to the thermal mismatch between the coating and the substrate, it is easy to cause the coating to peel off and delaminate under the action of thermal stress

Method used

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  • nanowire toughened zrb <sub>2</sub> -Preparation method of zrc-sic anti-oxidation coating

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Experimental program
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Effect test

Embodiment 1

[0034] C / C Fiber Toughened Ultra-high Temperature Ceramic Matrix Composites Surface Nanowire Toughened ZrB 2 - Preparation of ZrC-SiC anti-oxidation coating

[0035] Step 1, dissolve furan resin and sodium citrate in an organic solvent and add ZrB 2 , ZrC powder, mixed by ball milling to prepare mixed slurry.

[0036] Furan resin, sodium citrate, ZrB 2, ZrC, and ethanol in a mass ratio of 15:3:12:15:80. ZrB 2 , The particle size of ZrC is 300-800nm.

[0037] Step 2, coating the mixed slurry prepared in step 1 on the surface of the C / C composite material and curing to form a slurry layer;

[0038] The coating method is brushing, and the slurry is repeatedly brushed on the surface of the C / C fiber toughened ultra-high temperature ceramic matrix composite material to ensure that a uniform slurry layer is formed on the surface of the composite material.

[0039] The sprayed composite material is placed in an oven for heating and curing. The heating and curing program is as ...

Embodiment 2

[0052] C / SiC Fiber Toughened Ultra-high Temperature Ceramic Matrix Composites Surface Nanowire Toughened ZrB 2 - Preparation of ZrC-SiC anti-oxidation coating

[0053] Step 1, dissolve furan resin and sodium citrate in an organic solvent and add ZrB 2 , ZrC powder, mixed by ball milling to prepare mixed slurry.

[0054] Furan resin, sodium citrate, ZrB 2 , ZrC, and ethanol in a mass ratio of 20:5:18:25:120. ZrB 2 , The particle size of ZrC is 300-800nm.

[0055] Step 2. Apply the mixed slurry prepared in step 1 on the surface of the ultra-high temperature ceramic matrix composite material and solidify to form a slurry layer;

[0056] The coating method is spraying, and a pressure spray gun is used to spray the slurry onto the surface of the C / SiC fiber toughened ultra-high temperature ceramic matrix composite material. The distance between the nozzle and the composite material is 10cm, the pressure of the spray gun is 0.15±0.02MPa, the relative moving speed of the nozzle...

Embodiment 3

[0071] C fiber toughened ultra-high temperature ceramic matrix composite surface nanowire toughened ZrB 2 - Preparation of ZrC-SiC anti-oxidation coating

[0072] Step 1, dissolve furan resin and sodium citrate in an organic solvent and add ZrB 2 , ZrC powder, mixed by ball milling to prepare mixed slurry.

[0073] Furan resin, sodium citrate, ZrB 2 , ZrC, and ethanol in a mass ratio of 18:4:15:20:100. ZrB 2 , The particle size of ZrC is 300-800nm.

[0074] Step 2. Apply the mixed slurry prepared in step 1 on the surface of the ultra-high temperature ceramic matrix composite material and solidify to form a slurry layer;

[0075] The coating method is spraying, and a pressure spray gun is used to spray the slurry onto the surface of the C fiber toughened ultra-high temperature ceramic matrix composite material. The distance between the nozzle and the composite material is 20±1cm, the pressure of the spray gun is 0.15±0.02MPa, the relative moving speed between the nozzle a...

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Abstract

The present invention proposes a nanowire toughened ZrB 2 The preparation method of ‑ZrC‑SiC anti-oxidation coating comprises the steps of: coating the surface of the composite material containing ZrB 2 , ZrC mixed powder resin slurry; place the sprayed composite material on SiO 2 SiC powder, Si powder and C powder mixed powder, and vacuum high-temperature treatment, SiC nanowires are generated in situ; SiC is prepared on the coating, and finally dense nanowire-toughened ZrB is obtained. 2 ‑ZrC‑SiC anti-oxidation coating. The coating prepared by the method of the invention has high bonding strength with the substrate, and has good thermal shock resistance and ultra-high temperature oxidation resistance.

Description

technical field [0001] The invention relates to a nanowire toughened ZrB 2 -The preparation method of ZrC-SiC anti-oxidation coating belongs to the technical field of ultra-high temperature anti-oxidation coating. Background technique [0002] C / C, C / SiC or carbon fiber toughened ultra-high temperature ceramic matrix composites have low density, high strength and good temperature resistance, but their shortcomings of easy oxidation in high temperature For the application and promotion in the aerospace field, the preparation of an anti-oxidation coating on the surface is the most direct and effective way to improve its high-temperature and long-term anti-oxidation performance. [0003] Introduction of ZrB in SiC 2 , ZrC, can give full play to the synergistic effect of the three components, and effectively improve the ultra-high temperature oxidation resistance of the coating. Patent application CN201710293168.X prepared ZrB by plasma spraying 2 -SiC-ZrC coating, the coati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/87C04B35/80C04B35/58C04B35/56C04B35/573C04B35/577C04B35/622
CPCC04B41/87C04B41/507C04B35/58078C04B35/5622C04B35/573C04B35/62222C04B2235/3418C04B2235/422C04B2235/428C04B2235/5445C04B2235/614C04B41/5059C04B41/5057C04B41/4596C04B41/455C04B41/4531
Inventor 裴雨辰于新民王鹏王彤于艺杨冰洋刘俊鹏
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH