北京航空航天大学学报 ›› 2016, Vol. 42 ›› Issue (11): 2488-2494.doi: 10.13700/j.bh.1001-5965.2015.0760

• 论文 • 上一篇    下一篇

含泡沫镍中间层陶瓷/不锈钢接头微观组织和性能

张羽, 朱颖, 郭伟, 齐丹, 祁泽武   

  1. 北京航空航天大学 机械工程及自动化学院, 北京 100083
  • 收稿日期:2015-11-19 修回日期:2016-01-28 出版日期:2016-11-20 发布日期:2016-04-18
  • 通讯作者: 郭伟,E-mail:gwei@buaa.edu.cn E-mail:gwei@buaa.edu.cn
  • 作者简介:张羽,男,硕士。主要研究方向:异种材料连接与数值模拟。E-mail:13126737586@163.com;郭伟,男,博士,副教授。主要研究方向:特种材料的钎焊扩散连接技术。E-mail:gwei@buaa.edu.cn;朱颖,女,博士,副教授。主要研究方向:焊接、钎焊和扩散焊、微连接。E-mail:y.june@163.com
  • 基金资助:
    国家自然科学基金(11372019)

Microstructure and properties of ceramic/stainless steel joint with Ni foam interlayer

ZHANG Yu, ZHU Ying, GUO Wei, QI Dan, QI Zewu   

  1. School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
  • Received:2015-11-19 Revised:2016-01-28 Online:2016-11-20 Published:2016-04-18

摘要: 连接温度850℃,保温时间60 min,用泡沫镍金属作为中间层真空钎焊Al2O3陶瓷与1Cr18Ni9Ti不锈钢,利用扫描电子显微镜(SEM)、能谱(EDS)分析钎焊接头的微观组织,利用剪切实验检测接头的力学性能。实验结果表明,不添加中间层时,接头平均剪切强度只有7.7 MPa,断裂位置发生在陶瓷侧;添加泡沫镍中间层时,接头平均剪切强度达到101.7 MPa,断裂位置发生在陶瓷与泡沫镍金属连接界面处。不添加中间层时,Ti元素主要分布在钎料与陶瓷以及钎料与不锈钢反应界面处;添加中间层后钎焊接头中Ti元素主要分布在中间层,与Ni元素形成TiNi3,Ag、Cu和Ti元素分布更加均匀。

关键词: 泡沫镍, 剪切强度, 真空钎焊, Al2O3陶瓷, 1Cr18Ni9Ti不锈钢

Abstract: Al2O3 ceramic and 1Cr18Ni9Ti stainless steel were brazed with or without Ni foam interlayer at the temperature of 850℃ for 60 min at vacuum. The microstructure of the joint was investigated by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), besides shearing tests were used to test the mechanical properties of the joints. The experimental results show that the average shear strength of the joint without Ni foam interlayer is 7.7 MPa, and the fracture occurs in the ceramic. While Ni foam interlayer is used, the average shear strength of the joint is up to 101.7 MPa, and the fracture is located at the interface of ceramic and Ni foam interlayer. Without Ni foam, Ti is mainly distributed at the interface of ceramic and Ag-Cu-Ti and the interface of steel and Ag-Cu-Ti. With Ni foam, element Ti is distributed at the interlayer zone where TiNi3 is formed during the brazing process, besides, the distribution of Ag, Cu, Ti element is more uniform.

Key words: Ni foam, shear strength, vacuum brazing, Al2O3 ceramic, 1Cr18Ni9Ti stainless steel

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