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HU Tianyi1,2, LEI Yuzhen2, HU Shengpeng2, SONG Xiaoguo1, WANG Chunyu2. Effect of brazing temperature on interfacial microstructure and properties of Ti60/Si3N4 brazed joints[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(8): 28-31,37. DOI: 10.12073/j.hjxb.2018390195
Citation: HU Tianyi1,2, LEI Yuzhen2, HU Shengpeng2, SONG Xiaoguo1, WANG Chunyu2. Effect of brazing temperature on interfacial microstructure and properties of Ti60/Si3N4 brazed joints[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(8): 28-31,37. DOI: 10.12073/j.hjxb.2018390195
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Effect of brazing temperature on interfacial microstructure and properties of Ti60/Si3N4 brazed joints

  • 1. Harbin Institute of Technology, State Key Laboratory of Advanced Welding and Joining, Harbin 150001, China;
    2. Harbin Institute of Technology at Weihai, Shandong Provincial Key Laboratory of Special Welding Technology, Weihai 264209, China

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  • Received Date: June 05, 2017
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    • Abstract
  • In order to study the effect of brazing temperature on the microstructure and mechanical properties of Ti60/Si3N4 joints, Ag-28Cu eutectic alloy was used to braze Ti60 alloy and Si3N4 ceramic at the temperature range from 870℃ to 910℃ for 10 min. The microstructure of the brazed joint was analyzed by Scanning Electron Microscope and Energy Dispersive Spectrometer. The typical interfacial microstructure was Ti60/Ti-Cu intermetallic layer/Ag(s,s)+Cu(s,s)/Ti-Cu intermetallic layer/Ti5Si3+TiN/Si3N4. The evolution process of the brazed joint was analyzed. The results showed that the thickness of Ti-Cu intermetallic layer next to Ti60 alloy and the Ti5Si3+TiN layer on Si3N4 ceramic side increased gradually with the increasing of brazing temperature. Meanwhile, the content of Ag(s,s) and Cu(s,s) decreased. In addition, Ti-Cu compound was formed in Ti5Si3+TiN layer by the reaction between element Ti which diffused to Si3N4 ceramic side and element Cu in the liquid phase. The shear test indicated that the highest shear strength of 61.7 MPa was obtained with the brazing technological parameter of 880℃+10 min.
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    • References (8)
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