Brazing method Al2O3 ceramic and metallic material

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...