钎焊温度对Ti60/AgCu/ZrO2接头界面组织及性能的影响

doi:10.7527/S1000-6893.2017.421402

Abstract

Abstract: Reliable brazing of Ti60 alloy and ZrO₂ ceramic was successfully achieved using AgCu filler metal. The interfacial microstructure and reaction products of Ti60/AgCu/ZrO₂ joints brazed at different temperatures were investigated by the Scanning Electron Microscope (SEM), Energy Dispersive Spectrometer (EDS) and X-Ray Diffractometer (XRD). Results show that the typical interfacial microstructure of the Ti60/AgCu/ZrO₂ joint was Ti60 alloy/α-Ti+Ti₂Cu diffusion layer/TiCu+TiCu₂/Ag(s,s)+Cu(s,s)/Ti₃Cu₃O layer/TiO layer/ZrO₂ ceramic. With the increase of the brazing temperature, the thickness of the diffusion layer of α-Ti+Ti₂Cu, TiCu+TiCu₂ layers, Ti₃Cu₃O layer and TiO layer adjacent to the ZrO₂ ceramic increased gradually, and the granular Ti-Cu IMCs grew gradually, meanwhile the content of the Ag-based solid solution and Cu-based solid solution decreased. The shear test indicates that the joint brazed at 900℃ for 10 min exhibited the highest shear strength of 124.9 MPa tested at room temprature, and the joint tested at 500℃ and 600℃ exhibited the shear strength of 83.0 MPa and 30.2 MPa, respectively. Typical fracture analysis displays that the brazed joint tended to fracture at the interface between the ZrO₂ ceramic and the brazing seam, and in the brazing seam adjacent to the interface.

Key words: AgCu filler, Ti60 alloy, ZrO₂ ceramic, brazing, interfacial microstructure, mechanical property

CLC Number:

V261.3⁺4

BIAN Hong, HU Shengpeng, SONG Xiaoguo, ZHOU Zhiqiang, FENG Jicai. Effect of brazing temperature on interfacial microstructure and mechanical property of Ti60/AgCu/ZrO₂ joint[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017, 38(12): 421402-421402.

References

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Effect of brazing temperature on interfacial microstructure and mechanical property of Ti60/AgCu/ZrO₂ joint

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Effect of brazing temperature on interfacial microstructure and mechanical property of Ti60/AgCu/ZrO2 joint

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Effect of brazing temperature on interfacial microstructure and mechanical property of Ti60/AgCu/ZrO₂ joint