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A method for non-vacuum diffusion connection of ceramics and metals assisted by alternating current electric field

A technology of diffusion connection and AC electric field, applied in the field of ceramic and metal diffusion connection, can solve the problems of large residual stress, long connection time and high temperature of diffusion connection, and achieve the effect of reducing residual stress of joint, low cost and improving joint quality.

Active Publication Date: 2018-03-30
HARBIN INST OF TECH
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  • Summary
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  • Application Information

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Problems solved by technology

[0008] The invention aims to solve the problems of high diffusion connection temperature, large residual stress and long connection time in the existing field-induced diffusion connection between ceramics and metals, and provides a method for non-vacuum diffusion connection of ceramics and metals assisted by an alternating electric field

Method used

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  • A method for non-vacuum diffusion connection of ceramics and metals assisted by alternating current electric field
  • A method for non-vacuum diffusion connection of ceramics and metals assisted by alternating current electric field
  • A method for non-vacuum diffusion connection of ceramics and metals assisted by alternating current electric field

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specific Embodiment approach 1

[0028] Specific implementation mode 1: The method for the non-vacuum diffusion connection of ceramics and metals described in this implementation mode is carried out in accordance with the following steps:

[0029] 1. Surface grinding and polishing of the ceramics, intermediate materials and metal materials respectively, and ultrasonic cleaning in acetone to obtain surface pretreated ceramics, surface pretreated intermediate materials and surface pretreated metal materials;

[0030] The intermediate material is metal foil; the thickness of the intermediate material is 10 μm to 150 μm;

[0031] 2. Superimpose the surface pretreated ceramics, the surface pretreated intermediate material and the surface pretreated metal material in sequence to obtain the superimposed material, then place the superimposed material in a diffusion bonding furnace, and add AC to both ends of the superimposed material. Voltage and static voltage, the metal material after the surface pretreatment is co...

specific Embodiment approach 2

[0038] Embodiment 2: This embodiment differs from Embodiment 1 in that the intermediate material and the metal material described in Step 1 are made of the same material. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0039] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the ceramic described in step one is Al 2 o 3 and SiC. Others are the same as in the first or second embodiment.

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Abstract

A method for non-vacuum diffusion connection of ceramics and metals assisted by an alternating electric field, the invention relates to a method for diffusion connection of ceramics and metals. The invention aims to solve the problems of high diffusion connection temperature, large residual stress and long connection time in the conventional field-induced diffusion connection between ceramics and metals. Method: 1. Pretreatment; 2. Superimpose the surface pretreated ceramics, the surface pretreated intermediate material and the surface pretreated metal material in sequence, and place them in a diffusion bonding furnace, and add AC to both ends of the superimposed materials. Voltage and static voltage, firstly heat up the diffusion bonding furnace under argon atmosphere and pressure, then keep warm under argon atmosphere, AC voltage, static voltage, pressure and a certain temperature, and finally cool to room temperature to complete the AC electric field assisted ceramics A method of non-vacuum diffusion bonding to metals. The invention is used for a method for non-vacuum diffusion connection of ceramics and metals assisted by an alternating electric field.

Description

technical field [0001] The invention relates to a method for diffusion bonding of ceramics and metals. Background technique [0002] With the continuous development of science and technology, it is often required that materials must have superior properties such as high temperature resistance, corrosion resistance, and wear resistance before they can be used in harsh working environments. Engineering structural ceramics have many excellent properties such as strong oxidation resistance, high temperature strength, good thermal stability, small thermal expansion coefficient and corrosion resistance. They have broad application prospects in metallurgical machinery, aerospace, energy, microelectronics and other fields. [0003] However, the intrinsic brittleness and unfavorable nature of ceramic materials limit the wider application of ceramic materials to a large extent. The use of connection technology to manufacture ceramic / metal composite components can not only solve the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B37/02
Inventor 王清孙东立宫金鑫田倩韩秀丽刘宇泽张宁波
Owner HARBIN INST OF TECH
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