Abstract
In this work, the Ti-6Al-4V alloy and ZrB2-SiC ultra-high temperature ceramic joint was brazed by TiCuZrNi amorphous filler at 910°C with varied holding time. The element diffusion, microstructure and precipitation phase of the joints were analyzed in details. Reaction products in the joints were identified as β-Ti, (Ti,Zr)2(Cu,Ni), TiCu, Ti2Cu, TiC, Ti5Si3, TiB and TiB2. The formation schemes of reaction products were investigated. The holding time has substantial impacts on interfacial microstructure and shear strength of joints. A maximum shear strength of 345MPa of the joint was reached under a brazing temperature of 910°C and holding time of 1200s. It is also found that the shear strength depends on the amount of eutectic structure and brittle compounds in the joints.
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