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Based on ti 3 sic 2 -Al mixed powder as the middle layer of carbon-carbon composite material reaction diffusion connection method

A carbon-carbon composite material, ti3sic2-al technology, which is applied in the field of material processing, can solve the problems of inability to form connecting surfaces, affecting the superior performance of C/C composite material components, and easy occurrence of pores due to mutual diffusion, so as to achieve stable high-temperature high-strength connection. Effect

Inactive Publication Date: 2020-09-08
LANZHOU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

For example, the active brazing connection has the disadvantage that a large amount of solder penetrates into the carbon / carbon matrix and cannot form a particularly strong connection surface, and the interdiffusion between glass connection interface material elements is prone to defects such as pores, which affects the superior performance of C / C composite components. play

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  • Based on ti <sub>3</sub> sic <sub>2</sub> -Al mixed powder as the middle layer of carbon-carbon composite material reaction diffusion connection method
  • Based on ti <sub>3</sub> sic <sub>2</sub> -Al mixed powder as the middle layer of carbon-carbon composite material reaction diffusion connection method
  • Based on ti <sub>3</sub> sic <sub>2</sub> -Al mixed powder as the middle layer of carbon-carbon composite material reaction diffusion connection method

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Embodiment

[0020] Ti-based 3 SiC 2 -A carbon-carbon composite reactive diffusion connection method in which Al mixed powder is an intermediate layer, comprising the following steps:

[0021] S1, Al powder and Ti 3 SiC 2 The powder is mixed according to a certain proportion and stirred evenly to obtain Ti 3 SiC 2 - Al mixed powder, wherein Al powder accounts for 5% to 20% by weight;

[0022] S2, the Ti 3 SiC 2 -Al mixed powder is evenly spread between two cleaned C / C composite materials, and the powder loose thickness is about 1mm;

[0023] S3, the above-mentioned equipped with Ti 3 SiC 2 - After the C / C composite material of the Al mixed powder middle layer is pressurized and held for 30 minutes under the condition of argon or vacuum environment at a temperature of 1450°C and a pressure of 10-20Mpa, the connection of the composite materials can be completed.

[0024] figure 1 It is the morphology and EDS spectrum of the connecting layer of C / C composite material when containin...

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Abstract

The invention discloses a C / C composite material reaction diffusion connection method based on Ti3SiC2-Al mixed powder as an interlayer. The method comprises the following steps: mixing Al powder withTi3SiC2 powder according to a certain proportion, and stirring uniformly to obtain the Ti3SiC2-Al mixed powder; uniformly paving the obtained Ti3SiC2-Al mixed powder between two rinsed C / C compositematerials, wherein the loose thickness of the powder is 1mm; pressurizing the C / C composite materials, which is provided with the Ti3SiC2-Al mixed powder as the interlayer, in a protective atmosphereunder the conditions that the temperature is 1,450 DEG C and the pressure is 10-20 Mpa, and preserving heat for 30min. Ti3SiC2 powder is taken as a main ingredient, a proper amount of the Al powder isadded, and stable high-temperature high-strength connection between the C / C composite materials is realized by a solid-phase diffusion and reaction sintering method.

Description

technical field [0001] The invention relates to the field of material processing, in particular to a Ti-based 3 SiC 2 - Al mixed powder as the middle layer carbon-carbon composite material reaction diffusion connection method. Background technique [0002] At present, C / C composite materials are widely used in new material research and development, military industry and other fields. They have many excellent properties such as high modulus, high strength, high temperature resistance, corrosion resistance, friction and wear resistance, and low density. C / C composite materials An effective and stable connection to itself is of great importance. The existing connection methods include mechanical (such as bolt) connection, active metal brazing connection, glass connection and solid phase diffusion connection, each of which has its own advantages and disadvantages. For example, the active brazing connection has the disadvantage that a large amount of solder penetrates into the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B37/00
CPCC04B37/006C04B2237/12C04B2237/363
Inventor 贾建刚高昌琦安亮季根顺郝相忠杨兆庆
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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