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Reaction diffusion connection method of ceramic composite material and metal

A technology of ceramic composite materials and diffusion bonding, which is applied in the field of reactive diffusion bonding of ceramic composite materials and metals, and reactive diffusion bonding of ceramic and metal materials. Mechanical properties, improving thermal shock resistance, and alleviating the effect of mismatch problems

Inactive Publication Date: 2011-10-19
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex process, low work efficiency and low connection strength of these connection methods, their application range is limited.

Method used

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  • Reaction diffusion connection method of ceramic composite material and metal
  • Reaction diffusion connection method of ceramic composite material and metal
  • Reaction diffusion connection method of ceramic composite material and metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0023] Embodiment 1: TiB 2 / Ni-Ni 3 Al-Ni connection structure

[0024] TiB 2 / Ni composite ceramics, the Ni content is 10%, the Ni plate thickness is 5mm; the mixed powder is mixed in a molar percentage of 3:1, and the powder particle size is 5-10 μm, according to figure 1 The way shown will TiB 2 / Ni-Ni 3 Al-Ni is placed in the corundum mold between the electrodes, the current is raised to 1300A and kept for 12min, then lowered to 1000A for 5min, and finally the power is turned off, and the sample is cooled to room temperature with the furnace. The vacuum degree in the furnace during the whole process is about 2×10 -4 Pa, apply a unidirectional pressure of 70MPa, take out the sample from the mold after natural cooling, and the shear strength of the connecting piece is 78MPa.

Embodiment approach 2

[0025] Embodiment 2: TiC / Ni-TiAl-Ti connection structure

[0026] TiC / Ni composite ceramics, the Ni content is 10%, the thickness of the Ti plate is 5mm; the mixed powder of Ti and Al is mixed at a molar percentage of 1:1, and the particle size of the powder is 5-10 μm, according to figure 1 The method shown puts TiC / Ni-TiAl-Ti in the corundum mold between the electrodes, raises the furnace temperature to 773K, then adjusts the current to 1400A for 15min, slowly drops to 1200A, keeps for 5min, and slowly drops to 750A for 15min 5min; when the reaction reaches the 7th minute, apply a unidirectional pressure of 42.5MPa to the reaction blank until the end of the reaction; finally turn off the power, the sample is cooled to room temperature with the furnace, and the vacuum degree in the furnace is about 2×10 -3 Pa. The sample was taken out from the mold after natural cooling, and the shear strength of the connecting piece was 90MPa.

Embodiment approach 3

[0027] Embodiment 3: TiB 2 / Ni-Ni 3 Al-CrNi alloy connection structure

[0028] TiB 2 / Ni composite ceramics, Ni content 10%, CrNi plate thickness 5mm; Ni 3 Al mixed powder is mixed according to the molar percentage of 1:1, and the particle size of the powder is 5-10 μm, according to figure 1 The way shown will TiB 2 / Ni-Ni 3 Al-Ni is placed in the corundum mold between the electrodes, the current is raised to 1300A and kept for 12min, then lowered to 1000A for 5min, and finally the power is turned off, and the sample is cooled to room temperature with the furnace. The vacuum degree in the furnace during the whole process is about 2×10 -4 Pa, apply a unidirectional pressure of 70MPa, take the sample out of the mold after cooling naturally, and the shear strength of the connector is 80MPa.

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Abstract

The invention relates to a reaction diffusion connection method of ceramic composite material and metal, which belongs to the technical field of connection of ceramic material and metal material, and is characterized in that corresponding mixed powder is added between the ceramic composite material and the metal, combustion reaction heat is generated under the activation of an electric field, and the ceramic composite material and the metal material are locally smelted respectively and generate diffusion reaction to form connection. The combustion synthesis of the metal powder forms an intermetallic compound with the performance between ceramic and metal, thus alleviating the problem of mismatching between the metal and the ceramic; and the action of the electric field causes elements between interfaces to diffuse mutually, thus being beneficial to improving the strength of the connecting interfaces. By combustion heat release, the method realizes the synthesis of an intermediate layer and the connection of metal and ceramic simultaneously, and has the characteristics of being low in energy consumption and high in connection strength.

Description

technical field [0001] The invention relates to a reaction diffusion connection method of ceramic composite material and metal, which is a reaction diffusion connection method of ceramic and metal material under the action of an electric field with intermetallic compound as a transition layer. The invention belongs to the technical field of connection of dissimilar materials. Background technique [0002] A kind of reaction diffusion connection method of ceramic composite materials and metals developed in recent years is to use diffusion welding and brazing welding technology to form a composite layered connection interface through the connection between single-layer or multi-layer ceramic materials and metal materials, and set plasticity. A good material acts as a transition layer to relieve the residual stress of the connection due to the difference in the physical properties of the material. Due to the complex process, low work efficiency and low connection strength of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B37/02
Inventor 孟庆森胡利方陈少平樊文浩王福明
Owner TAIYUAN UNIV OF TECH
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