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A kind of preparation method of carbon/carbon composite outer coating

A carbon composite material and outer coating technology, applied in the field of C/C composite materials, can solve the problems of not being able to be prepared at one time, the surface of the outer coating is easy to crack, and the thickness of the coating is insufficient, and achieves good bonding and controllable structure. , the effect of convenient operation

Active Publication Date: 2016-02-10
INST OF FLEXIBLE ELECTRONICS TECH OF THU ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of supercritical fluid technology to prepare C / C composite coatings requires high temperature and high pressure for the preparation process, which requires high equipment requirements, and the formed outer coating must be heat treated in an inert atmosphere. The preparation cycle It is relatively long [BemeburgPL, KrukonisVJ.Processingofcarbon / carboncompositesusingsupercriticalfluidtechnology[P].UnitedStatesPatentUS5035921,1991], the coating prepared by the in-situ forming method needs to be treated at 1500°C at high temperature, and cannot be prepared at one time [HuangJian-Feng, LiHe-Jun, ZengXie-Rong, LiKe-Zhi.Surf.coat.Technol.2006,200,5379.], the surface of the outer coating prepared by sol-gel method is easy to crack and the coating thickness is insufficient [HuangJian-Feng, ZengXie-Rong, LiHe-Jun, XiongXin-Bo, SunGuo-ling.Surf.coat.Technol.2005, 190, 255.], but the preparation of the coating by the reaction method of slurry coating still requires multiple brushes and cannot be completed at one time, and post-heat treatment is required [FuQian-Gang, LiHe-Jun, WangYong-Jie, LiKe-Zhi, TaoJun.Surface&CoatingTechnology.2010,204,1832.], although some alloy coatings have been prepared by detonation spraying and ultrasonic spraying, but, There are still many imperfections in the process, and the high-temperature oxidation resistance of the prepared coating needs to be further improved [TerentievaVS, BogachkovaOP, GoriatchevaEV. -Preparation of ZrSiO by pulsed arc discharge deposition method 4 -B 2 o 3 The method of composite anti-oxidation coating has not yet been reported

Method used

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  • A kind of preparation method of carbon/carbon composite outer coating
  • A kind of preparation method of carbon/carbon composite outer coating
  • A kind of preparation method of carbon/carbon composite outer coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Choose ZrSiO 4 Powder (commercially available ZrSiO 4 The powder is intermittently ground by a fast grinder for 40 hours, and the average particle size is controlled at 500nm), B 2 o 3 Powder (commercially available B 2 o 3 The powder has been intermittently milled by a fast ball mill for 24 hours, and the average particle size is controlled at 500nm), and tellurium (purity ≥ 99.7%) and isobutanol (purity ≥ 99.8%) are used as raw materials;

[0027] 2) First take 45.0gZrSiO 4 Powder and 45.0gB 2 o 3 The mixed powder composed of powder is dispersed in 1500mL of isobutanol, and prepared into a suspension A with a mixed powder concentration of 60g / L. The suspension A is ultrasonically oscillated for 80min (ultrasonic power is 1200W), and then placed in a magnetic stirring Stirring on the device for 6h;

[0028] 3) After step 2), add tellurium element to the suspension A to obtain a mixture, control the concentration of tellurium element in the mixture to 4.0g / L,...

Embodiment 2

[0032] 1) Choose ZrSiO 4 Powder (commercially available ZrSiO 4 The powder is intermittently ground by a fast grinder for 44 hours, and the average particle size is controlled at 550nm), B 2 o 3 Powder (commercially available B 2 o 3 The powder has been intermittently milled by a fast ball mill for 28 hours, and the average particle size is controlled at 550nm), and tellurium (purity ≥ 99.7%) and isobutanol (purity ≥ 99.8%) are used as raw materials;

[0033] 2) First take 54.7gZrSiO 4 Powder and 54.7gB 2 o 3 The mixed powder composed of powder is dispersed in 1750mL of isobutanol, and prepared into a suspension A with a mixed powder concentration of 62.5g / L. The suspension A is ultrasonically oscillated for 100min (ultrasonic power is 1400W), and then placed in a magnetic Stir on the stirrer for 8h;

[0034] 3) After step 2), add tellurium element to the suspension A to obtain a mixture, control the concentration of tellurium element in the mixture to 4.5g / L, ultrason...

Embodiment 3

[0038] 1) Choose ZrSiO 4 Powder (commercially available ZrSiO 4 The powder is intermittently ground by a fast grinder for 48 hours, and the average particle size is controlled at 600nm), B 2 o 3 Powder (commercially available B 2 o 3 The powder has been intermittently milled by a fast ball mill for 32 hours, and the average particle size is controlled at 600nm), and tellurium (purity ≥ 99.7%) and isobutanol (purity ≥ 99.8%) are used as raw materials;

[0039] 2) First take 65.0gZrSiO 4 Powder and 65.0gB 2 o 3 The mixed powder composed of powder is dispersed in 2000mL of isobutanol, and prepared into a suspension A with a mixed powder concentration of 65g / L. The suspension A is ultrasonically oscillated for 120min (ultrasonic power is 1600W), and then placed in a magnetic stirring Stirring on the device for 10h;

[0040] 3) After step 2), add simple substance tellurium to the suspension A to obtain a mixture, control the concentration of simple substance tellurium in th...

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Abstract

The invention relates to a carbon / carbon composite material outer coating preparation method. According to the invention, ZrSiO4 powder and B2O3 powder are mixed and dispersed in isobutyl alcohol, such that a suspension liquid A is prepared; after ultrasonic oscillation, stirring is carried out on a magnetic stirrer; elemental tellurium is added to the suspension liquid A; ultrasonic oscillation is carried out, and stirring is carried out while heating, such that a suspension liquid B is obtained; the suspension liquid B is added into a hydrothermal kettle, and magnetron pulse hydrothermal electrophoresis arc discharge deposition is carried out; an obtained sample is placed in an electric blast drying oven; and the sample is dried for 2-4h under a temperature of 60-100 DEG C. The carbon / carbon composite material outer coating provided by the invention has no crack on the surface. With the method, the carbon / carbon composite material ZrSiO4-B2O3 composite outer coating with controllable structure and good performances can be obtained under low temperate. The preparation process is simple; operation is convenient; raw materials are easy to obtain; and preparation cost is relatively low.

Description

technical field [0001] The invention belongs to the technical field of C / C composite materials, and relates to a method for preparing a high-temperature outer coating of a C / C composite material, in particular to a method for preparing ZrSiO with uniform surface and no microcracks produced by infrared-magnetron-pulse arc discharge deposition 4 -B 2 o 3 Method of composite topcoat. Background technique [0002] Carbon / carbon (C / C) composites have excellent properties such as low thermal expansion coefficient, low density, high temperature resistance, ablation resistance, high strength, high modulus, etc. The excellent performance that the amount increases with the increase of temperature makes it have broad application prospects in the aerospace field. However, C / C composites will be oxidized in an aerobic environment exceeding 370 °C, and the loss of oxidized mass will lead to a decrease in its strength, which limits its practical application. Therefore, solving the prob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/85
Inventor 黄剑锋孔蔚华张永亮李翠艳欧阳海波
Owner INST OF FLEXIBLE ELECTRONICS TECH OF THU ZHEJIANG