발간논문

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Vol.29, No.10, 1068 ~ 1077, 1991
Title
Effect of Additional Elements in Ag - Cu Based Brazing Alloy on bonding Strength and Interfacial Structure of Si3N4 - 304 Stainless Steel Joints (1) ( Effect of Mo Addition )
이우천Woo Chun Lee, 강춘식Choon Sik Kang
Abstract
Joinning of 304 stainless steel to Si₃N₄, ceramic using Cu-48%Ag-3.8%Ti brazing alloy was made in vacuum furnace. Effect of Mo addition in Cu-Ag-Ti alloy, brazing temperature, and brazing time on interfacial reactions and banding strength of Si₃N₄-304 joints were investigated. Bonding strength was determined by fracture shear loading and high shear strength value of more than 180 ㎫ were obtained for joints brazed with Cu-Ag-Ti- Mo alloy at 1083 K for 1.2 ks. The strong bonding is attritutable to the formation of FeTiSi and TO_5Si₄ by redox reaction between Si₃N₄ and Ti at Si+3N₄ ceramic interface. Thickness of interfacial reaction layer was increased and bonding strength was decreased as brazing temperature and brazing time were increased. It was found that interfacial reaction was retarded by Mo addition.
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