Process based on molten-salt growth method for metallizing surface of ceramic base composite material member

A composite material component and surface metal technology, which is applied in the field of surface metallization of ceramic matrix composite material components, can solve the problems of composite material mechanical properties decline, uneven deposition thickness, complex surface properties, etc., and achieve fast preparation speed and high bonding strength , the effect of high binding strength

Inactive Publication Date: 2009-12-16
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

Among these methods, the Mo-Mn method uses the generated glass to connect metal and ceramics to achieve surface metallization, but this cannot meet the high-temperature performance requirements of the metallization layer; the sputtering method has a slow deposition rate and is not suitable for complex shapes. Surface metallization of ceramic matrix composite components; the ion plating process is complex and requires a high degree of vacuum, and for more complex components, the deposition thickness on different surfaces is different; sputtering and ion plating processes lead to metallization due to their physical deposition properties The layer and the substrate do not form a strong chemical bond, so the connection strength between the metallized layer and the substrate is also low; the prominent process problem of chemical vapor deposition is that the deposition temperature is high, the mechanical properties of the composite material after deposition may decrease, and at the same time, diffusion heat treatment is required after deposition To improv

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  • Process based on molten-salt growth method for metallizing surface of ceramic base composite material member
  • Process based on molten-salt growth method for metallizing surface of ceramic base composite material member

Examples

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Example Embodiment

[0021] Example 1: C f / SiC composite surface Ti metallization

[0022] The metallization process of the composite material in this embodiment is as follows:

[0023] 1. Prepare molten salt raw materials with the following qualities: NaCl 340g, KCl 430g, K 2 TiF 6 330g and 200g Ti powder;

[0024] 2. Mix the molten salt raw materials prepared above uniformly, place them in the crucible boiler, and then add C f The surface of the / SiC composite material is cleaned, dried and buried in molten salt mixed raw materials, heated to 1000°C at a rate of 10°C / min under the protection of Ar atmosphere, after holding for 5 hours, it is cooled to room temperature with the furnace;

[0025] 3. Put the above C f / SiC composite material components are taken out, placed in water for repeated cleaning, and then ultrasonically cleaned with ethanol for 15 minutes, taken out and dried to obtain Ti metalized C on the surface f / SiC composite material components.

[0026] C on the above surface Ti after...

Example Embodiment

[0027] Example 2: C f / SiC composite surface Zr metallization

[0028] The metallization process of the composite material in this embodiment is as follows:

[0029] 1. Prepare molten salt raw materials with the following qualities: NaCl 400g, KCl 500g, K 2 ZrF 6 385g and 370g Zr powder;

[0030] 2. Mix the molten salt raw materials prepared above uniformly, place them in the crucible boiler, and then add C f The surface of the / SiC composite component is cleaned, dried and buried in molten salt mixed raw materials, heated to 1100°C at a rate of 10°C / min under the protection of Ar atmosphere, kept for 3h and then cooled to room temperature in the furnace;

[0031] 3. Put the above C f / SiC composite material components are taken out, placed in water for repeated cleaning, and then ultrasonically cleaned with ethanol for 15 minutes, taken out and dried to obtain the Zr metalized C f / SiC composite material components.

[0032] C after Zr metallization on the above surface f The sur...

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Abstract

The invention discloses a process based on the molten-salt growth method for metallizing the surface of a ceramic base composite material member, including the following steps: firstly, a molten salt mixed raw material is arranged in a fixed container; secondly, the ceramic base composite material member of which the surface is cleaned is embedded in the molten salt mixed raw material, temperature is raised to 800 to 1200 DEG C under inert atmosphere, and after the temperature is preserved for 1 to 5 hours the ceramic base composite material member is cooled to room temperature along with the furnace; and finally, the ceramic base composite material member is taken out, and the surface thereof is repeatedly cleaned and dried, thereby obtaining the ceramic base composite material member with the metallized surface. The technological process of the invention has the advantages of high preparation speed and efficiency, simple and easily executed operation and high bonding strength between an obtained metallized layer and the ceramic base composite material, thereby meeting the requirement on metallizing the ceramic base composite material member.

Description

technical field [0001] The invention relates to a method for processing the surface of a ceramic matrix composite material component, in particular to a method for metallizing the surface of a ceramic matrix composite material component. Background technique [0002] Realizing the surface metallization of ceramic matrix composites changes the physical and chemical properties of the surface and improves the wettability between ceramic matrix composites and metals, which plays a very important role in the application fields of ceramic matrix composites and metal sealing or connection. [0003] Ceramic matrix composites can be divided into particle-reinforced, whisker-reinforced, and fiber-reinforced according to the properties of the reinforcing phase. They have high specific strength, high specific stiffness, high temperature resistance, oxidation resistance, and erosion resistance. They are mainly used in aerospace , aviation, nuclear energy, transportation and other importa...

Claims

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Application Information

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IPC IPC(8): C04B41/88
Inventor 堵永国张为军梁赤勇郑晓慧
Owner NAT UNIV OF DEFENSE TECH
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