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Cu-Pd-V钎料真空钎焊Cf/SiBCN复合材料的界面组织与性能

李文文1,熊华平1,陈波1,邹文江1,刘伟2

李文文1,熊华平1,陈波1,邹文江1,刘伟2. Cu-Pd-V钎料真空钎焊Cf/SiBCN复合材料的界面组织与性能[J]. 焊接学报, 2018, 39(9): 90-94. DOI: 10.12073/j.hjxb.2018390230
引用本文: 李文文1,熊华平1,陈波1,邹文江1,刘伟2. Cu-Pd-V钎料真空钎焊Cf/SiBCN复合材料的界面组织与性能[J]. 焊接学报, 2018, 39(9): 90-94. DOI: 10.12073/j.hjxb.2018390230
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

Cu-Pd-V钎料真空钎焊Cf/SiBCN复合材料的界面组织与性能

Microstructure and mechanical property of Cf/SiBCN composite joint brazed with Cu-Pd-V filler alloy

  • 摘要: 利用Cu-Pd-V钎料对新型四元陶瓷基复合材料Cf/SiBCN进行了真空钎焊连接.利用座滴法研究了Cu-Pd-V钎料对Cf/SiBCN复合材料的动态润湿性.利用SEM和XRD对钎焊接头微观组织及断口物相进行了分析表征.结果表明,经1 170℃保温30 min后钎料在复合材料上的润湿角为57°.在1 170℃-10 min钎焊规范下,Cu-Pd-V钎料在Cf/SiBCN复合材料表面形成厚度约为1 μm的V (C,N)反应层,主要包括VC和VN化合物,钎缝中央为Cu3Pd和CuPd两种固溶体相.接头的室温三点弯曲强度为58.1 MPa,当测试温度提高至600℃时接头强度上升至90.2 MPa,在700和800℃测试温度下钎焊接头强度呈下降趋势,但仍然可以维持在室温强度水平,分别为66.9和64.6 MPa.
    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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