Diffusion bonding method of ternary layered ceramic titanium-silicon-carbon and solid solution thereof and ferritic stainless steel based on Ni foil intermediate layer

A ternary layered, diffusion-connected technology, used in solid electrolyte fuel cells, electrical components, fuel cell components, etc., can solve the problem of long-term stability of the coating that needs to be investigated, and achieve high practical value and anti-oxidation performance. Excellent, low junction temperature effect
CN112209729AActive Publication Date: 2021-01-12OCEAN UNIV OF CHINA +2
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
OCEAN UNIV OF CHINA
Publication Date
2021-01-12

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Abstract

The invention relates to a diffusion bonding method of ternary layered ceramic titanium-silicon-carbon and solid solution thereof and ferritic stainless steel based on a Ni foil intermediate layer. The method comprises the following steps: gradually polishing the to-be-bonded surfaces of ternary layered ceramic and ferritic stainless steel by using metallographic abrasive paper, and polishing by using diamond abrasive paste; cleaning the Ni foil to remove impurities such as oil stains on the surface; arranging according to the sequence of ternary layered ceramic / Ni foil / ferritic stainless steel, welding a temperature measuring platinum wire on the side surface of the sample, and carrying out diffusion bonding on the welded sample; and after the connection experiment is completed, performing cooling and pressure relief to obtain the diffusion connection joint. The joint obtained by adopting the method provided by the invention is good in interface bonding, low in connection temperatureand good in use performance and mechanical property, a continuous reaction layer is generated on the interface, welding defects such as cracks and air holes are avoided, the problem of Cr volatilization of an alloy connector can be solved, and the preparation and processing cost of a ceramic connector is reduced; and the application range of the ternary layered ceramic Ti3SiC2 and the solid solution material thereof is expanded.
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Description

technical field

[0001] The invention belongs to the technical field of ceramic connections and solid oxide fuel cell connections, and in particular relates to a diffusion connection method of ternary layered ceramic titanium silicon carbon and its solid solution based on a Ni foil intermediate layer and ferritic stainless steel. Background technique

[0002] Solid oxide fuel cell (Solid Oxide Fuel Cell, SOFC) is a third-generation fuel cell, which is an all-solid-state device that directly converts chemical energy stored in fuel and oxidant into electrical energy in an efficient and environmentally friendly manner at medium and high temperatures. Chemical power plant. The connecting body is one of the key components of the plate-type solid oxide fuel cell SOFC stack. Its function is to electrically connect the battery cells, separate and distribute the fuel gas of the anode and the oxidant gas of the cathode.

[0003] Titanium silicide (Ti 3 SiC 2 ) is a new type of terna...

Claims

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