Bonding Mechanisms and Shear Properties of Alumina Ceramic/Stainless Steel Brazed Joint |
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| Authors: | G W Liu G J Qiao H J Wang J P Wang T J Lu |
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| Affiliation: | (1) MOE Key Laboratory for Strength and Vibration, Xi’an Jiaotong University, Xi’an, 710049, China;(2) State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, 710049, China |
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| Abstract: | Al2O3 ceramic/stainless steel joints were fabricated by activated molybdenum-manganese (Mo-Mn) sintering metallization plus vacuum
brazing using Ag-28 wt.% Cu alloy. The bonding mechanisms including metallization and interfacial bonding were analyzed and
discussed by means of scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and x-ray diffraction (XRD).
Tests were also carried out to examine the influence of brazing on joint shear strength. The metallization mechanisms of glassy
phase migration and chemical reaction were confirmed experimentally, while Ni coating was found to play a key role in the
joining of metallized ceramic to metal via the Ag-Cu filler layer. As a result of the joining, the average shear strength
of the joints exceeds 95 MPa, with the maximum reaching 110 MPa. |
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