【摘 要】
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The experimental investigation of the direct diffusion bonding of Ti-6Al-4V to ZQSn10-10 was carried out in vacuum. The microstructure of bonded joint was studi
【机 构】
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College of Materials Science and Engineering,Harbin Institute of Technology
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The experimental investigation of the direct diffusion bonding of Ti-6Al-4V to ZQSn10-10 was carried out in vacuum. The microstructure of bonded joint was studied by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and the mechanical properties were detected by the tensile experiments. The microstructure and tensile strength of the joint mainly depend on the bonding temperature and bonding time. A satisfying diffusion bonded interface with a tensile strength of 73.9 Mpa can be obtained under the condition of bonding temperature 850 ℃for 30 min. Three kinds of reaction products were observed in the bonded interface, namely β-Ti,Cu3Ti and CuSn3Ti5. And the brittle Cu3Ti and CuSn3Ti5 are mainly responsible for lowering the strength of the bonded joint. The diffusion distances of Sn, Cu and Ti and square root of bonding time are approximately linear relationship. And diffusion velocity of Sn, Cu and Ti in the diffusion reaction layer are 0.013 9,0.069 7 and 0.056 4 mm2/s.
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