발간논문

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Vol.29, No.4, 313 ~ 323, 1991
Title
Effect of Brazing Variables on Interfacial Reactions and Bonding Strength of Alumina - Steel Joints
이우천Woo Chun Lee, 강춘식Choon Sik Kang
Abstract
Joining of 304 stainless steel to alumina ceramics using Cu-48%Ag-3.8%Ti brazing alloy was made in vacuum furnace. Effects of Sn and Al addition in Cu-Ag-Ti alloy, brazing temperature, and brazing time on interfacial reactions and bonding strength of alumina-304 joints were investigated. Bonding strength was determined by fracuture shear loading. The strong bonding is at tributable to the formation of Cu₂Ti₄O by redox reaction between Al₂O₃ and Ti at alumina interface. Thickness of interfacial reaction layer was increased and bonding strength was decreased as brazing temperature and brazing time were increased. Interfacial reaction was accelerated by Sn addition and was restrained by Al addition in brazing alloy.
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