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LI Wenwen1, XIONG Huaping1, CHEN Bo1, ZOU Wenjiang1, LIU Wei2. Microstructure and mechanical property of Cf/SiBCN composite joint brazed with Cu-Pd-V filler alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(9): 90-94. DOI: 10.12073/j.hjxb.2018390230
Citation: LI Wenwen1, XIONG Huaping1, CHEN Bo1, ZOU Wenjiang1, LIU Wei2. Microstructure and mechanical property of Cf/SiBCN composite joint brazed with Cu-Pd-V filler alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(9): 90-94. DOI: 10.12073/j.hjxb.2018390230
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Microstructure and mechanical property of Cf/SiBCN composite joint brazed with Cu-Pd-V filler alloy

  • 1. Welding and Plastic Forming Division, Beijing Institute of Aeronautical Materials, Beijing 100095, China;
    2. Science and Technology on Advanced High Temperature Structural Materials Division, Beijing Institute of Aeronautical Materials, Beijing 100095, China

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  • Received Date: April 12, 2017
    Graphical Abstract
    • Abstract
  • Cu-Pd-V filler alloy was used to join Cf/SiBCN composite. Its dynamic wettability on the composite was studied with the sessile drop method. After heating at 1 170℃ for 30 min, the filler alloy showed a contact angle of 57°. The microstructure and phase confirmation of the joint were analyzed by SEM and XRD, respectively. When brazed at 1 170℃ for holding time of 10 min, the interfacial reactions resulted in resulted in the formation of V(C,N) reaction band with the thickness of 1 μm at the surface of Cf/SiBCN composite, and the microstructure in the central part of the joint is composed of Cu3Pd and CuPd solid solutions. The average three-point bend strength of Cf/SiBCN-Cf/SiBCN joints at room temperature is 58.1 MPa. When the test temperature was increased to 600℃, the average joint strength was even elevated to 90.2 MPa. Eventhough the strength of brazed joints decreased at 700℃ and 800℃, which was 66.9 MPa and 64.6 MPa respectively, it still maintained at room temperature strength value.
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    • References (10)
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