Preparation method of carbon/carbon composite material ZrO2 particle and mullite whisker synergetically toughened MoSi2 composite coating

A technology of mullite whiskers and carbon composite materials, applied in the field of C/C composite materials, can solve the problems of easy cracking on the surface of the outer coating, inability to complete the preparation at one time, insufficient coating thickness, etc., and achieve controllable performance, operation The effect of convenience and low preparation cost

Active Publication Date: 2014-11-05
INST OF FLEXIBLE ELECTRONICS TECH OF THU ZHEJIANG
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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 should be heat treated in an inert atmosphere, and the preparation cycle Relatively long [Bemeburg P L, Krukonis V J.Processing of carbon/carbon composites using supercritical fluid technology[P].United States Patent US5035921,1991], the coating prepared by the in-situ forming method needs to be treated at a high temperature of 1500°C, and Can not be prepared at one time [Huang Jian-Feng, Li He-Jun, Zeng Xie-Rong, Li Ke-Zhi.Surf.coat.Technol.2006,200,5379.], the outer coating prepared by sol-gel method The surface is prone to cracking and the coating thickness is insufficient [Huang Jian-Feng, Zeng Xie-Rong, Li He-Jun, Xiong Xin-Bo, Sun Guo-ling.Surf.coat.Technol.2005,190,255.] The coating

Method used

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  • Preparation method of carbon/carbon composite material ZrO2 particle and mullite whisker synergetically toughened MoSi2 composite coating
  • Preparation method of carbon/carbon composite material ZrO2 particle and mullite whisker synergetically toughened MoSi2 composite coating
  • Preparation method of carbon/carbon composite material ZrO2 particle and mullite whisker synergetically toughened MoSi2 composite coating

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1:

[0027] 1) Choose commercially available mullite whiskers (length-to-diameter ratio of 50-100), molybdenum disilicide powder, ZrO 2 Powder (molybdenum disilicide powder and ZrO 2 The powders were subjected to dry ball milling for 20 hours, and the average particle size was controlled at 4-7μm), iodine (purity ≥99.7%), and propylene glycol (purity ≥99.8%) as raw materials;

[0028] 2) First take an appropriate amount of molybdenum disilicide powder, ZrO 2 Powder and mullite whiskers (the content of mullite whiskers is mullite whiskers, molybdenum disilicide powder and ZrO 2 45% of the total mass of the powder, the content of the molybdenum disilicide powder is 50% of the total mass, ZrO 2 The powder content is 5% of the total mass) dispersed in 2L propylene glycol to prepare mullite whiskers, molybdenum disilicide powder and ZrO 2 For a suspension with a total powder concentration of 50g / L, place the suspension on a magnetic stirrer and stir for 2 hours to obtain su...

Example Embodiment

[0032] Example 2:

[0033] 1) Choose commercially available mullite whiskers (length-to-diameter ratio of 50-100), molybdenum disilicide powder, ZrO 2 Powder (molybdenum disilicide powder and ZrO 2 The powders were subjected to dry ball milling for 20 hours, and the average particle size was controlled at 4-7μm), iodine (purity ≥99.7%), and propylene glycol (purity ≥99.8%) as raw materials;

[0034] 2) First take an appropriate amount of molybdenum disilicide powder, ZrO 2 Powder and mullite whiskers (the content of mullite whiskers is mullite whiskers, molybdenum disilicide powder and ZrO 2 40% of the total mass of the powder, the content of molybdenum disilicide powder is 50% of the total mass, ZrO 2 The powder content is 10% of the total mass) dispersed in 2.1L propylene glycol to prepare mullite whiskers, molybdenum disilicide powder and ZrO 2 For a suspension with a total powder concentration of 51g / L, place the suspension on a magnetic stirrer and stir for 2 hours to obtain sus...

Example Embodiment

[0038] Example 3:

[0039] 1) Choose commercially available mullite whiskers (length to diameter ratio of 50-100), molybdenum disilicide powder, ZrO 2 Powder (molybdenum disilicide powder and ZrO 2 The powders were subjected to dry ball milling for 20 hours, and the average particle size was controlled at 4~7μm), iodine (purity ≥99.7%), and propylene glycol (purity ≥99.8%) as raw materials;

[0040] 2) First take an appropriate amount of molybdenum disilicide powder, ZrO 2 Powder and mullite whiskers (the content of mullite whiskers is mullite whiskers, molybdenum disilicide powder and ZrO 2 25% of the total mass of powder, the content of molybdenum disilicide powder is 60% of the total mass, ZrO 2 The powder content is 15% of the total mass) dispersed in 2.2L propylene glycol to prepare mullite whiskers, molybdenum disilicide powder and ZrO 2 For a suspension with a total powder concentration of 52g / L, place the suspension on a magnetic stirrer and stir for 3 hours to obtain suspens...

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Abstract

The invention provides a preparation method of a carbon/carbon composite material ZrO2 particle and mullite whisker synergetically toughened MoSi2 composite coating. According to the invention, mullite whisker, molybdenum disilicide powder and ZrO2 powder are dispersed in propylene glycol; magnetic stirring is carried out, such that suspension liquid A is obtained; elemental iodine is added into the suspension liquid A; magnetic stirring is carried out while heating, such that suspension liquid B is obtained; the suspension liquid B is added into a hydrothermal kettle; a carbon/carbon composite material sample with an SiC coating is clipped on a cathode clip of the hydrothermal kettle; under a cathode rotary condition, a hydrothermal double pulse electrophoretic deposition reaction is carried out; and the sample is fetched and dried. The carbon/carbon composite material ZrO2 particle and mullite whisker synergetically toughened MoSi2 composite outer coating provided by the invention has no crack on the surface. The coating has high bonding strength on a substrate. According to the invention, the composite outer coating with controllable structure and good performance can be obtained under low temperature. The preparation process is simple; operation is convenient; the 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 composite coating of C / C composite materials, in particular to a method for preparing carbon / carbon composite material ZrO by a cathode rotation-hydrothermal double-pulse electrophoretic deposition method 2 Synergistic Toughening of MoSi by Particles and Mullite Whiskers 2 Composite coating method. 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 ...

Claims

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Application Information

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IPC IPC(8): C04B41/85C04B41/89
Inventor 黄剑锋张博曹丽云李翠艳费杰吴建鹏
Owner INST OF FLEXIBLE ELECTRONICS TECH OF THU ZHEJIANG
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