Effect of Ti Addition on Shear Strength of Brazing Diamond and Ag Based Filler Alloy

Yan Chen; Hong Jun Xu; Yu Can Fu; Hong Hua Su

doi:10.4028/www.scientific.net/KEM.416.264

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 416Effect of Ti Addition on Shear Strength of Brazing...

Effect of Ti Addition on Shear Strength of Brazing Diamond and Ag Based Filler Alloy

Abstract:

The shear strength samples of brazed single crystal diamond with the (72Ag–28Cu)–xTi (x=2, 4, 7wt.%) active filler metal were prepared, using vacuum brazing methods. Microstructure evolution of interfacial reaction product and shear strength of the brazed diamond and Ag based filler alloy were studied. The results show that there exits a layer of TiC on the surface diamond in different Ti additions, and the thickness of TiC layer increases with the increase of Ti addition. With the increase of Ti addition, the shear strength of the brazed joint decreases due to the increase of TiC layer thickness and amount of intermetallics. From the results, it was seen that mutual diffusion of C and Ti was effective on the morphology of the interface zone that affected the shear strength of the bonds. To achieve a reliable brazed joint, the Ti content must be controlled under 4wt.%.

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Periodical:

Key Engineering Materials (Volume 416)

Pages:

264-268

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.416.264

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Online since:

September 2009

Authors:

Yan Chen, Hong Jun Xu, Yu Can Fu, Hong Hua Su

Keywords:

Ag Based Brazing Alloy, Diamond, Shear Strength, Vacuum Brazing

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