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Brazing method for ceramic and metal

A brazing method and ceramic technology, applied in the field of brazing of ceramics and metals, can solve the problems of difficulty in forming connections between ceramics and metal materials, affecting the strength and air tightness of joints, and large differences in thermal expansion coefficients, and improving production and distribution. , The effect of reducing thermal deformation and increasing strength

Inactive Publication Date: 2019-05-10
SHENZHEN SIBIONICS CO LTD
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  • Application Information

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Problems solved by technology

However, due to the poor wettability of ceramics, it is difficult to form a good connection between ceramics and metal materials.
Moreover, the thermal expansion coefficients of ceramics and metals differ greatly, which will lead to excessive thermal stress in the joints and affect the strength and airtightness of the joints.

Method used

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  • Brazing method for ceramic and metal
  • Brazing method for ceramic and metal
  • Brazing method for ceramic and metal

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Embodiment Construction

[0021] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the drawings. In the following description, the same reference numerals are given to the same components, and repeated descriptions are omitted. In addition, the drawings are only schematic diagrams, and the ratio of dimensions between components, the shape of components, and the like may be different from the actual ones.

[0022] figure 1 A schematic flowchart of a ceramic-metal brazing method according to an embodiment of the present invention is shown.

[0023] The brazing method of ceramics and metal involved in the present embodiment includes: preparing ceramics 31 to be welded and metal 33 to be welded, and carrying out surface treatment on ceramics 31 to be welded, so that the surface of ceramics to be welded 31 is formed into a smooth surface (step S10 ); metallization is carried out on the surface of the ceramics to be welded 31 to form an intermediate ...

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Abstract

The invention provides a brazing method for ceramic and metal. The brazing method includes preparing to-be-welded ceramic and to-be-welded metal, and subjecting the to-be-welded ceramic to surface treatment to form a smooth surface of the to-be-welded ceramic; metallizing the surface of the to-be-welded ceramic to form an intermediate metal layer combined with the to-be-welded ceramic, wherein thethermal expansion coefficient of the to-be-welded ceramic is matched with that of the intermediate metal layer; sequentially stacking the to-be-welded ceramic, brazing filler metal and the to-be-welded metal before brazing. The brazing method has the advantages that the brazing filler metal can well infiltrate the to-be-welded ceramic with the metallized surface, the intermediate metal layer canmake the thermal expansion coefficient of a brazing interface between the ceramic and the metal exhibit gradient transition, and thermal expansivity differences caused by different interfacial materials are reduced, so that the thermal stress of joints is reduced, and the performance is improved.

Description

technical field [0001] The invention particularly relates to a brazing method of ceramics and metals. Background technique [0002] As a high-temperature structural material, ceramics are widely used in various fields because of their good biocompatibility, heat resistance, corrosion resistance and electrical insulation properties. However, in practical applications, in order to solve the problem of poor processability caused by the excessive hardness of ceramics, it is necessary to connect ceramics and metals by certain methods to form metal-ceramic composite structural parts. [0003] Currently, the most common method for joining ceramic and metallic materials is brazing. Brazing has the advantages of small heat-affected zone and reliable joints, and is very suitable for the connection between dissimilar materials. However, due to the poor wettability of ceramics, it is difficult to form a good connection between ceramics and metal materials. Moreover, the thermal expan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B37/02
CPCC04B37/023C04B2237/12C04B2237/52C04B2237/55
Inventor 王蕾周永东李清卢路旺
Owner SHENZHEN SIBIONICS CO LTD
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