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High-temperature ceramic/metal riveting-glass sealing combination connection method

A technology of glass sealing and high-temperature ceramics, which is applied in the field of high-temperature ceramic/metal riveting-glass sealing composite connection, which can solve the problems of low operating temperature and poor joint strength, and achieve increased reliability, high-reliability sealed connection, and no stimulation The effect of sexual odor

Inactive Publication Date: 2015-09-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the technical problems of poor joint strength and low service temperature in existing connection methods when the size of high-temperature ceramic / metal structural parts is large, and provides a high-temperature ceramic / metal riveting-glass sealing compound connection method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0016] Specific implementation mode 1: In this implementation mode, a high-temperature ceramic / metal riveting-glass sealing compound connection method is specifically carried out according to the following steps:

[0017] 1. The ceramics and metals are pre-assembled, drilled and spot-faced, disassembled and deburred, cleaned in sequence, and then anodic oxidation is used to prepare a dense and uniform oxide film on the surface of the metal;

[0018] 2. Make the glass sealant and adhesive into a paste, then magnetically stir for 5-10 minutes, and then use the brushing method to evenly coat the metal and ceramic surfaces after step 1, and coat 1-5 layers to control the coating. Layer thickness is 100-500μm;

[0019] 3. Assemble, nail and rivet the ceramics and metals processed in step 3, and then perform riveting troubleshooting to obtain assembled test pieces;

[0020] 4. Put the assembled test piece into the resistance furnace, connect in the air atmosphere, control the tempe...

specific Embodiment approach 2

[0021] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the ceramics described in step one are Al 2 o 3 Ceramic, Si 3 N 4 Ceramic or SiC, the metal is Ti alloy. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0022] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the anodic oxidation process parameters in step 1 are: control temperature 10-30°C, current density 5-15A / dm 2 , voltage 90-200V, time 10-40min, wherein the composition of the electrolyte is potassium dichromate 15-35g / L, manganese sulfate 15-25g / L, ammonium sulfate 15-25g / L, and the thickness of the oxide film is controlled to be 5 ~20μm. Others are the same as in the first or second embodiment.

[0023] The specific operation process of the anodic oxidation process is as follows: put the metal into the electrolyte, turn on the electricity, keep it for 10-40 minutes, and complete.

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Abstract

The invention provides a high-temperature ceramic / metal riveting-glass sealing combination connection method and relates to a connection method of high-temperature ceramic / metal. The connection method solves the technical problems of poor joint intensity and low usage temperature of a present connection method when a high-temperature ceramic / metal structural member has a large size. The method comprises steps: first, pretreatment of ceramic and metal is carried out; second, glass sealants and binders are mixed and stirred, and coating is carried out; third, assembling, nail placing and rivet application are carried out; fourth, the product is placed in an electric resistance furnace for thermal insulation. Glass systems with different ratios are selected as sealing materials according to different ceramic / metal and usage temperatures. The glass sealants can match ceramic and metal in the thermal expansion coefficients, and can keep certain viscosity during high temperature usage, and high-temperature high-reliability sealing connection of ceramic / metal connection members is achieved. The connection method is used for obtaining high-temperature ceramic / metal riveting-glass sealing combination high-reliability connection.

Description

technical field [0001] The invention relates to a high-temperature ceramic / metal connection method. Background technique [0002] At present, the methods of connecting ceramics and metals mainly include adhesive bonding, mechanical connection, fusion welding, friction welding, instantaneous liquid phase connection, self-propagating high temperature connection, diffusion welding and brazing, among which brazing and diffusion welding are research The most widely used connection method. The intermediate layer of ceramic / metal brazing and diffusion welding should choose active metal intermediate layer, which can relieve joint stress and obtain higher connection strength. However, due to the influence of the lower melting point of the metal in the middle layer, the service temperature of the ceramic / metal structure cannot be too high. In addition, when the size of the ceramic / metal structure is large, the metal interlayer is not enough to relieve the residual stress caused by t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B37/02C03C8/24
Inventor 何鹏林铁松林盼盼
Owner HARBIN INST OF TECH
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