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WANG Guoxing, SONG Xiaoguo, CHEN Haiyan, LI Yang, CAO Jian. Interfacial microstructure and properties of Si_3N_4 joints brazed using TiNi-V eutectic brazing alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2012, (10): 41-44.
Citation: WANG Guoxing, SONG Xiaoguo, CHEN Haiyan, LI Yang, CAO Jian. Interfacial microstructure and properties of Si_3N_4 joints brazed using TiNi-V eutectic brazing alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2012, (10): 41-44.
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Interfacial microstructure and properties of Si_3N_4 joints brazed using TiNi-V eutectic brazing alloy

  • 1.

    School of Materials & Chemical Engineering, Heilongjiang Institute of Technology, Harbin 150050, China

  • 2.

    School of Materials Science & Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China;State Key Lab of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China

  • 3.

    State Key Lab of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China

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  • Received Date: May 20, 2011
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    • Abstract
  • TiNi-V eutectic brazing alloy was fabricated by vacuum arc melting, and its spreadability on the surface of Si3N4 ceramic was investigated.The brazing of Si3N4 ceramic was achieved using TiNi-V brazing alloy.The typical interfacial microstructure was Si3N4/TiN+Ti-Si compounds/NiV.The effect of brazing temperature on the interfacial microstructure and properties of joints was investigated.The results showed that with the increasing of brazing temperature, the reaction between molten brazing alloy and Si3N4 ceramic intensified and the thickness of TiN+Ti-Si compounds layer increased gradually.Moreover, lots of microcracks were formed in the joints due to the residual stress in joints, which deteriorated the joining properties.The highest shear strength of 28 MPa was obtained when the specimen was brazed at 1 200℃ for 10 min.The joint fractured in TiN+Ti-Si compounds layer, which belonged to brittle fracture.
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