Brazing method Al2O3 ceramic and metallic material

A technology of metal materials and brazing methods, applied in the field of brazing of Al2O3 ceramics and metal materials, can solve the problems of low joint strength and low air tightness of joints, achieve good compactness, easy control, reduce processing temperature and the effect of time

Inactive Publication Date: 2009-03-25
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 is in order to solve existing connection Al 2 o 3 The problem of low joint strength and low airtightness of the joints after the method of connecting ceramics and metal materials, and Al 2 o 3 Brazing method of ceramic and metal materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0008] Specific implementation mode one: present implementation mode A1 2 o 3 The brazing method of pottery and metal material is to carry out according to the following steps: one, take acetone as medium to Al 2 o 3 The ceramics were ultrasonically cleaned, and the surface of the active metallized alloy foil was cleaned with acetone after the oxide film was removed; 2. The active metallized alloy foil was placed on Al 2 o 3 On the pre-connected surface of the ceramic, the thickness of the foil is 10-400 μm. Put the assembled workpiece into the vacuum heating furnace and vacuumize until the vacuum degree reaches 1.0×10 -3 After Pa, heat up to 700-1000°C at a rate of 10-30°C / min and keep it warm for 5-15 minutes, then cool down to 300-500°C at a rate of 5-10°C / min, turn off the power and naturally cool to room temperature, that is get active metallized Al 2 o 3 Ceramics; 3. Clean the metal materials. After removing the surface oil with a degreasing agent, first wash with ...

specific Embodiment approach 2

[0010] Specific embodiment two: the difference between this embodiment and specific embodiment one is: Al in step one 2 o 3 The ceramics are 95 porcelain or 99 porcelain. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0011] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the active metallization alloy in step 1 contains 5%-15% active elements and 70%-85% Al eutectic elements by weight percentage. Other steps and parameters are the same as those in Embodiment 1.

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PUM

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Abstract

The invention discloses a braze welding method of AI2O3 ceramics and metal material, and relates to the connection method of the AI2O3 ceramics and the metal material. The invention solves the problem of the existing method for connecting the AI2O3 ceramics and the metal material that the strength of a connector after connection is low and the air tightness of a connecting piece is low. The braze welding method of the AI2O3 ceramics and the metal material of the invention is carried out according to the following steps: 1. the cleaning of the ceramics, and the decoating of a chaff; 2. the preparation of active metalized ceramics; 3. metal cleaning; and 4. braze welding; thus obtaining a welding part of the ceramics and the metal material. Another method of the invention is carried out according to the following steps: 1. the cleaning of the ceramics, and the preparation of active metalized powder paste; 2. the preparation of the active metalized ceramics; 3. metal cleaning; and 4. braze welding; thus obtaining the welding part of the ceramics and the metal material. The connection strength of the connector of the welding part welded by the method of the invention can reach up to 50 to 100 MPa, and the leakage rate of the connector is less than 1.0 multiplied by 10<-8>Pa question mark m<3>/s.

Description

technical field [0001] The present invention relates to Al 2 o 3 The connection method of ceramic and metal materials. Background technique [0002] Al 2 o 3 Ceramics have excellent properties such as high strength, high hardness, high temperature resistance, corrosion resistance, wear resistance and good insulation performance, and are widely used in power electronics, aerospace, energy transportation and other fields. However, the inherent hardness and brittleness of ceramic materials make it difficult to process and manufacture, and they need to be used in combination with metals to complement the properties of metals. Aluminum and its alloys are widely used metal materials with good plasticity, low density, high thermal conductivity and electrical conductivity. 2 o 3 Composite components with excellent properties of ceramics and aluminum have broad application prospects. So how would Al 2 o 3 When ceramics are connected with aluminum or its alloys, obtaining hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B37/02
Inventor 张丽霞王颖冯吉才徐富家张春光
Owner HARBIN INST OF TECH
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