Microstructure and Property of ZrO2 Joint Direct Brazed with Aluminum

摘要

In order to realize direct brazing ZrO2 with Al, a kind of sputtering Ni/Al double layer on Al solder surface was used. Results showed that ZrO2 could directly brazed to Al solder with sputtering Ni/Al double layer without interface reaction. And then direct brazing was investigated with the change of brazing temperature. Microstructure and joint strength of brazing seam were analyzed. Results showed that joint strength of brazing seam increased from 68.6 MPa to 121.2MPa with the increasement of brazing temperature from 680 degrees C to 840 degrees C, when the brazing temperature increased up to 920 degrees C, the joint strength gradually increased to 122.6 MPa. With the joint strength enhancement of brazing seam, the fracture of the joint is gradually transferred from interface to the brazing seam.