Ag-Cu钎料钎焊ZTA陶瓷与TC4钛合金
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摘要
使用Ag-Cu钎料钎焊ZTA陶瓷与TC4钛合金,利用扫描电子显微镜(SEM)、能谱分析仪(EDS)和X射线衍射仪(XRD)等设备分析了钎焊接头界面组织,阐明了反应机理,并研究了钎焊温度对接头界面组织和力学性能的影响.结果表明,钎焊接头的界面结构为ZTA陶瓷/TiO+Ti_3(Cu,Al)_3O/Ag(s,s)/Ti_2Cu_3/TiCu/Ti_2Cu/α+β-Ti/TC4合金.随着钎焊温度的升高,钎缝中Ag基固溶体层变薄,Ti-Cu金属间化合物层变厚,当钎焊温度达到890℃时,Ti-Cu金属间化合物几乎占据整了个钎缝区域.随着温度的升高,接头抗剪强度先增大后减小,在钎焊温度为890℃时,接头的室温抗剪强度达到最大值,其值为43.2 MPa.
Ag-Cu filler was used to braze ZTA ceramic and TC4 alloy. Scanning electron microscopy, energy disperse spectroscopy and X ray diffraction were used to identify the interfacial microstructure and the reaction mechanism of the joints was clarified. The typical interfacial microstructure was ZTA ceramic/TiO+Ti_3(Cu,Al)_3O/Ag(s,s)/Ti_2Cu_3/TiCu/Ti_2Cu/α+β-Ti/TC4 alloy. The experiments were carried at the brazing temperature from 810 °C to 910 °C. The results indicated that as the brazing temperature increased, Ag-based solid solution layer thinned and Ti-Cu intermetallic compound layers thickened. When brazed at 890 °C for 10 min, Ti-Cu intermetallic compounds occupied almost the entire brazing area, and the shear strength of the joints reached the highest value of 43.2 MPa.
Ag-Cu filler was used to braze ZTA ceramic and TC4 alloy. Scanning electron microscopy, energy disperse spectroscopy and X ray diffraction were used to identify the interfacial microstructure and the reaction mechanism of the joints was clarified. The typical interfacial microstructure was ZTA ceramic/TiO+Ti_3(Cu,Al)_3O/Ag(s,s)/Ti_2Cu_3/TiCu/Ti_2Cu/α+β-Ti/TC4 alloy. The experiments were carried at the brazing temperature from 810 °C to 910 °C. The results indicated that as the brazing temperature increased, Ag-based solid solution layer thinned and Ti-Cu intermetallic compound layers thickened. When brazed at 890 °C for 10 min, Ti-Cu intermetallic compounds occupied almost the entire brazing area, and the shear strength of the joints reached the highest value of 43.2 MPa.
引文
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[3]Fernie J A,Drew R A L,Knowles K M.Joining of engineering ceramics[J].Metallurgical Reviews,2009,54(5):283-331.
[4]Rohde M,Südmeyer I,Urbanek A,et al.Joining of alumina and steel by a laser supported brazing process[J].Ceramics International,2009,35(1):333-337.
[5]刘会杰,冯吉才.陶瓷与金属的连接方法及应用[J].焊接,1999(6):5-9.Liu Huijie,Feng Jicai.Method and application of ceramic and metal connection[J].Welding&Joining,1999(6):5-9.
[6]Yang Z,Lin J,Wang Y,et al.Characterization of microstructure and mechanical properties of Al2O3/TiAl joints vacuum-brazed with Ag-Cu-Ti+W composite filler[J].Vacuum,2017,143:294-302.
[7]Lin G,Huang J,Zhang H.Joints of carbon fiber-reinforced SiCcomposites to Ti-alloy brazed by Ag-Cu-Ti short carbon fibers[J].Journal of Materials Processing Technology,2007,189(1):256-261.
[8]杨敏旋,林铁松,韩春,等.工艺参数对Al2O3/TC4合金接头界面组织及力学性能的影响[J].焊接学报,2012,33(8):53-56.Yang Minxuan,Lin Tiesong,Han Chun,et al.Effects of process parameters on the interface structure and mechanical properties of Al2O3/TC4 alloy joints[J].Transactions of the China Welding Institution,2012,33(8):53-56.
[9]Dai Xiangyu,Cao Jian,Wang Dong,et al.Interfacial reaction behavior and mechanical characterization of ZrO2/TC4 joint brazed by Ag-Cu filler metal[J].Materials Science and Engineering:A,2015,646:182-189.
[10]朱定一,王永兰.含Ti钎料与Al2O3界面反应的机理及热力学计算[J].兵器材料科学与工程,1998,21(2):22-26.Zhu Dingyi,Wang Yonglan.Mechanism and thermodynamic calculation of interface reaction between Ti filler and Al2O3[J].Ordnance Material Science and Engineering,1998,21(2):22-26.
[11]Kozlova O,Braccini M,Voytovych R,et al.Brazing copper to alumina using reactive cuagti alloys[J].Acta Materialia,2010,58(4):1252-1260.