Effect of Ti Content on Microstructure and Mechanical Properties of Si3N4/Si3N4 Joints Brazed with Ag-Cu-Ti+Mo Composite Filler

Abstract:

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Mo particles have been introduced into Ag-Cu-Ti brazing alloy for the joining of Si3N4 ceramic. Effects of Ti content on microstructure and mechanical properties of the joints were investigated. The results present that a compact reaction layer which is composed of TiN and Ti5Si3 was formed at the Si3N4/solder interface. The central part of the joint was composed of Ag based solid solution, Cu based solid solution, Mo particles and Cu-Ti intermetallics. By increasing Ti content in the composite filler, both the thickness of reaction layer and the amount of Cu-Ti intermetallics in the joint increased, which is beneficial for the joint strength. However, the reaction between Ti and Si3N4 proceeded more excessively. Simultaneously, more Cu-Ti intermetallics were precipitated while elevating Ti content to 6wt.%, leading to deterioration of the bonding strength. The maximum bending strength (429.4MPa) was obtained when Ti content is 4wt.% in the composite filler.

Info:

Periodical:

Materials Science Forum (Volumes 654-656)

Main Theme:

Edited by:

Jian-Feng Nie and Allan Morton

Pages:

2018-2021

DOI:

10.4028/www.scientific.net/MSF.654-656.2018

Citation:

J. Zhang and Y. M. He, "Effect of Ti Content on Microstructure and Mechanical Properties of Si3N4/Si3N4 Joints Brazed with Ag-Cu-Ti+Mo Composite Filler", Materials Science Forum, Vols. 654-656, pp. 2018-2021, 2010

Online since:

June 2010

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$35.00

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