Ceramic granule reinforced composite material

A ceramic particle, reinforced composite technology, applied in welding/cutting media/materials, welding media, manufacturing tools, etc., to achieve the effect of reducing requirements, enhancing life, and improving work efficiency

Inactive Publication Date: 2008-10-22
UNIV OF SCI & TECH OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] We aim at this fatal problem of Ag-CuO solder, by using ceramic powder additives in Ag-CuO solder to improve the thermal diffusion and heat balance in the soldering process process, impels the microstructure to be more uniform and reasonable, thereby completing the present invention

Method used

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  • Ceramic granule reinforced composite material
  • Ceramic granule reinforced composite material
  • Ceramic granule reinforced composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The ceramic particle reinforced composite brazing filler metal used for ceramic / ceramic or ceramic / metal brazing is composed of Ag powder and Cu powder mixed with metal powder A and ceramic particles B in a mass ratio; the average particle size of Ag powder is 1 μm, The average particle size of Cu powder is 0.5 μm, and the average particle size of reinforcement YSZ ceramic powder is 0.5 μm. It is brazing through solder in the air, using Cu to form CuO and intermetallic compounds during the brazing process to enhance the welding strength, and adding ceramic particles to the generation of pores. The preparation is as follows: firstly, Ag powder and Cu powder are mixed in a molar ratio (Ag: 92 mol%; Cu: 8 mol%) to form Ag-8Cu metal powder. Then 2% (mass ratio) of YSZ particles relative to the total mass was added. Use a mixer to mix evenly. Then pour the mixed brazing filler metal into a mortar, add a binder (terpineol solution of ethyl cellulose) at a solid content of 8...

Embodiment 2

[0024] The ceramic particle reinforced composite brazing filler metal was prepared in the same way as in Example 1, except that the ceramic particles were ZrO 2 , with an average particle size of 1 μm.

Embodiment 3

[0026] The ceramic particle reinforced composite brazing filler metal is prepared in the same way as in Example 1, except that the ceramic particles are Al 2 O 3 , with an average particle size of 5 μm.

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Abstract

The present invention relates to a ceramic particle strengthening composite solder used for ceramic/ceramic or ceramic/metal solder. The ceramic particle strengthening composite solder consists of 90 to 99.8 percent of metal powder A and 0.2 to 10 percent of ceramic particle B according to the weight percentage; the metal powder A is formed by mixing Ag powder and Cu powder; relatively to the metal powder A, the mol rate of the Ag powder is 80 to 99.5 percent and the mol rate of the Cu powder is 0.5 to 20 percent. The ceramic particle strengthening composite solder provided by the present invention can reduce the generation of air holes in welding line, work at the high temperature of around 800 DEG C, and prolong the service life of the welding line at the high temperature and in the oxidizing atmosphere and the reducing atmosphere, thus obtaining the welding with high joint performance.

Description

technical field [0001] The invention belongs to the technical field of welding, and relates to a ceramic particle reinforced composite brazing filler metal, which is used for ceramic / ceramic or ceramic / metal brazing in air, and is especially suitable for the packaging of solid oxide fuel cells. Background technique [0002] In the process of ceramic brazing, in order to obtain good ceramic / ceramic and ceramic / metal joints, active alloys are generally used as connecting materials in a high-vacuum connection process. The characteristics of the active method are that the solder has excellent wetting properties and good air tightness. However, this method also has some shortcomings: (1) the high vacuum connection efficiency is low, the cost is high and the size of the test piece is limited; (2) the working temperature of the ceramic / metal joint brazed by the general Ag-based active solder does not exceed 400 °C ; (3) There is a large difference in thermal expansion coefficient ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30
CPCC22C1/0466B23K35/00B23K35/28B23K35/286B23K35/22C22C1/05
Inventor 谢斌杨鹏飞王海千姜友松宋亦周
Owner UNIV OF SCI & TECH OF CHINA
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