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ZHU Yongquan, ZHANG Lixia, REN Wei, FENG Jicai. Vacuum brazing of active metallized Al2O3 ceramic to 5005 aluminum alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(11): 78-82. DOI: 10.12073/j.hjxb.2018390277
Citation: ZHU Yongquan, ZHANG Lixia, REN Wei, FENG Jicai. Vacuum brazing of active metallized Al2O3 ceramic to 5005 aluminum alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(11): 78-82. DOI: 10.12073/j.hjxb.2018390277
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Vacuum brazing of active metallized Al2O3 ceramic to 5005 aluminum alloy

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  • Received Date: June 17, 2017
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  • The Al2O3 ceramic were metallized with the Ag-Cu-Ti powder, and then used Al-Si filler to braze Al2O3 ceramic and 5005 aluminum alloy. The influence of brazing temperature on the interfacial structures and shear strength has been researched. It was shown that the typical interface structure of the joints was 5005 aluminum alloy/α-Al+θ-Al2Cu+ξ-Ag2Al/ξ-Ag2Al+θ-Al2Cu+Al3Ti/Ti3Cu3O/Al2O3 ceramic. During the brazing, Al-Si-Mg filler reacted with Ti and 5005 aluminum alloy, which made the joints of Al2O3 ceramic and 5005 aluminum alloy. With the increased of brazing temperature, the thickness of the Ti3Cu3O reaction layer adjacented to the Al2O3 ceramic was thinned. Besides, more Ag reacted with Cu and Al, and the amount of ξ-Ag2Al+θ-Al2Cu increased. And the shear strength of the joints increased firstly and then decreased with the increase of brazing temperature. The maximum shear strength of joints was 15 MPa when vacuum brazing was performed at 610 °C for 5 min.
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