Presureless connection and brazing method for ZrO2 ceramic and Al2O3 ceramic

Abstract

The invention discloses a method for soldering ZrO2 ceramic and Al2O3 ceramic without pressure. The method comprises the following steps: (1) preparation of a TiH2 paste; (2) application of the TiH2 paste; (3) treatment of the soldered surface of an Al2O3 ceramic part; and (4) non-pressure assembly and vacuum soldering. The method is characterized by preserving heat for a certain period at least two different temperatures, including a start decomposition temperature and a soldering temperature under a vacuum condition higher than TiH2 and the vacuum degree is superior to 8*10<-3>Pa in the step of vacuum soldering; slowly heating before the soldering temperature is achieved; and finally, slowing cooling to room temperature. The method can realize non-pressure connection of the zirconium oxide ceramic and the aluminum oxide ceramic, is simple and economic, is suitable for large-scale production, and is applicable to connections of various joint modes. The prepared connecting piece has areliable structure, and can be used in occasions of loading and medium-low temperature application.

Description

A method for pressureless brazing of ZrO2 ceramics and Al2O3 ceramics This application is a divisional application of the patent application with the application number 200710018637.3, the application date is September 11, 2007, and the title is "A Method for Pressureless Brazing of ZrO2 Ceramics and Stainless Steel or Al2O3 Ceramics". technical field The invention relates to a brazing method for ceramics and stainless steel or ceramics, in particular to a method for pressureless brazing connection of ZrO2 ceramics and Al2O3 ceramics. Background technique Regarding the connection between ceramics and metals or ceramics, there are mainly considerations of the structural reliability of the connectors, such as strength and high temperature resistance, and manufacturing costs. At present, for the connection technology between ceramics and stainless steel or ceramics, there are mainly methods such as sintered metal powder method (such as Mo-Mn method), active metal brazing and...

AI Technical Summary

Problems solved by technology

However, due to the large elastic modulus and poor plasticity of stainless steel, the welding stress is not easy to eliminate, and the connection between zirconia and stainless steel is very difficult.

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