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Development of a new CuNiTiB brazing alloy for joining Si3N4 to Si3N4

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Abstract

Joining Si3N4 to Si3N4 was carried out initially with a Cu34Ni27Ti39 brazing alloy prepared by double melting under a vacuum condition. However, the strength of the joints was not as high as expected. The causes were studied. Based on the results of the analysis, a CuNiTiB brazing filler metal was designed. The Si3N4/Si3N4 joints were then brazed with this new brazing alloy in the paste form, and joints with a three-point bend strength of 338.8 MPa at room temperature were obtained. The interfacial reactions of the joint are also discussed. With the rapidly solidified foils of the brazing alloy, the bend strength of the Si3N4/Si3N4 joints under the same brazing conditions is raised to 402 MPa at room temperature. The Si3N4/Si3N4 joints brazed with this newly developed brazing alloy exhibit a rather high and steady bend strength (about 406 MPa) at 723 K.

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Authors and Affiliations

  1. the Welding Division, Department of Materials Science and Engineering, Jilin University of Technology, 130025, Changchun City, People’s Republic of China

    Huaping Xiong (Doctor), Chuangeng Wan (Professor) & Zhenfeng Zhou (Professor)

Authors
  1. Huaping Xiong
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  2. Chuangeng Wan
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  3. Zhenfeng Zhou
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Xiong, H., Wan, C. & Zhou, Z. Development of a new CuNiTiB brazing alloy for joining Si3N4 to Si3N4 . Metall Mater Trans A 29, 2591–2596 (1998). https://doi.org/10.1007/s11661-998-0231-x

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  • DOI: https://doi.org/10.1007/s11661-998-0231-x

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