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Method for preparing C/C composite material beta-Y2Si2O7 nano-wire toughened mullite/silicate glass coating

A technology for toughening carbon composite materials and nanowires, which is applied in the field of preparing carbon/carbon composite material composite outer coatings, can solve the problems of long preparation cycle, achieve short preparation cycle, improve brittleness, and combine well

Active Publication Date: 2017-03-08
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These processes for preparing C / C composite coatings are carried out under high temperature or high pressure due to the preparation process, and the preparation cycle is relatively long

Method used

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  • Method for preparing C/C composite material beta-Y2Si2O7 nano-wire toughened mullite/silicate glass coating
  • Method for preparing C/C composite material beta-Y2Si2O7 nano-wire toughened mullite/silicate glass coating
  • Method for preparing C/C composite material beta-Y2Si2O7 nano-wire toughened mullite/silicate glass coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) First mix mullite powder with β-Y 2 Si 2 o 7 The mixed powder composed of nanowires is dispersed in butanol to prepare a suspension A1 with a mixed powder concentration of 25g / L, and β-Y in the mixed powder 2 Si 2 o 7 The mass fraction of the nanowires is 10%, the mass fraction of the mullite powder is 90%, the suspension A1 is ultrasonically oscillated for 50 minutes, and then stirred on a magnetic stirrer for 18 hours to obtain the suspension A2;

[0041] (2) Add elemental iodine to suspension A2 to obtain a mixture, the concentration of elemental iodine in the mixture is 1 g / L, stir the mixture on a magnetic stirrer for 2 hours, heat while stirring, and control the heating temperature at 60° C. to obtain a suspension B;

[0042] (3) Pour the suspension B into the hydrothermal kettle, then clamp the C / C composite material sample with SiC coating on the cathode clamp in the hydrothermal kettle, the anode is graphite, and then seal the hydrothermal kettle Then...

Embodiment 2

[0049] (1) First mix mullite powder with β-Y 2 Si 2 o 7 The mixed powder composed of nanowires is dispersed in butanol to prepare a suspension A1 with a mixed powder concentration of 20g / L, and the β-Y in the mixed powder 2 Si 2 o 7 The mass fraction of the nanowires is 15%, the mass fraction of the mullite powder is 85%, the suspension A1 is ultrasonically oscillated for 30 minutes, and then stirred on a magnetic stirrer for 12 hours to obtain the suspension A2;

[0050] (2) Add elemental iodine to suspension A2 to obtain a mixture, the concentration of elemental iodine in the mixture is 2 g / L, stir the mixture on a magnetic stirrer for 3 hours, heat while stirring, and control the heating temperature at 70° C. to obtain a suspension B;

[0051] (3) Pour the suspension B into the hydrothermal kettle, then clamp the C / C composite material sample with SiC coating on the cathode clamp in the hydrothermal kettle, the anode is graphite, and then seal the hydrothermal kettle ...

Embodiment 3

[0058] (1) First mix mullite powder with β-Y 2 Si 2 o 7 The mixed powder composed of nanowires is dispersed in butanol to prepare a suspension A1 with a mixed powder concentration of 30g / L, and the β-Y in the mixed powder 2 Si 2 o 7 The mass fraction of the nanowires is 20%, the mass fraction of the mullite powder is 80%, the suspension A1 is ultrasonically oscillated for 60 minutes, and then stirred on a magnetic stirrer for 24 hours to obtain the suspension A2;

[0059] (2) Add elemental iodine to suspension A2 to obtain a mixture, the concentration of elemental iodine in the mixture is 3g / L, stir the mixture on a magnetic stirrer for 4h, heat while stirring, and control the heating temperature at 80°C to obtain a suspension B;

[0060](3) Pour the suspension B into the hydrothermal kettle, then clamp the C / C composite material sample with SiC coating on the cathode clamp in the hydrothermal kettle, the anode is graphite, and then seal the hydrothermal kettle Then put ...

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Abstract

The invention discloses a method for preparing a C / C composite material beta-Y2Si2O7 nano-wire toughened mullite / silicate glass coating. The method comprises the steps of firstly, preparing a beta-Y2Si2O7 nano-wire toughened mullite porous coating on the surface of C / C-SiC by a simple pulsed arc discharging deposition method, and then, preparing the silicate glass outer coating by adopting an electromagnetic induction heating method. The beta-Y2Si2O7 nano-wire toughened mullite / silicate glass composite oxidation-resisting coating prepared by the method disclosed by the invention is good in bonding with a base body, and the control on a composite coating structure can be achieved; the preparation cycle is short, and the process flow is simple; the preparation of the coating is completed under low-temperature conditions, so that the cost is low.

Description

technical field [0001] The invention relates to a method for preparing a carbon / carbon composite material composite outer coating, in particular to a carbon / carbon composite material β-Y prepared by a pulsed arc discharge deposition method combined with electromagnetic induction heating 2 Si 2 o 7 Method for toughening mullite / silicate glass composite anti-oxidation coating with nanowires. Background technique [0002] Carbon / carbon (C / C) composite materials have excellent properties such as low thermal expansion coefficient, low density, high temperature resistance, ablation resistance, high strength, high modulus, etc., especially within 2200 °C, the strength and modulus increase with temperature The excellent performance such as increase makes it one of the most promising high-temperature structural materials, and the most promising material for manufacturing aerospace turbine engines and components. However, C / C composites are rapidly oxidized in an oxidizing atmosphe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/89
CPCC04B41/009C04B41/52C04B41/89C04B35/83C04B41/5024C04B41/4596C04B41/4539C04B41/0072C04B41/5022
Inventor 黄剑锋周磊曹丽云罗艺佳刘锦涛吴建鹏欧阳海波李翠艳
Owner SHAANXI UNIV OF SCI & TECH