Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Microstructure of Materials
Microstructure and Property of ZrO2 Joint Direct Brazed with Aluminum
Xiaoben QiBingyang MaHailong ShangRulin ZhangJingke LuJiabin FuHao Xu
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2020 Volume 61 Issue 7 Pages 1252-1257


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 121.2 MPa with the increasement of brazing temperature from 680°C to 840°C, when the brazing temperature increased up to 920°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.

Fig. 7 Schematics of removing Al2O3 film from Al foil (a) uncoated Al foil before Al melting (b) uncoated Al foil after Al melting (c) coated Ni/Al double layer on Al foil before Al melting (d) coated Ni/Al double layer on Al foil after Al melting. Fullsize Image
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© 2020 The Japan Institute of Metals and Materials
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