Behaviors of interfacial elements during the brazing of SiO2 glass ceramic to Ti-6Al-4V with AgCu/Ni interlayer |
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| Authors: | Liu Duo Zhou Li Tang Dongyan Tao Ji and Feng Jicai |
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| Affiliation: | (1.Shandong Provincial Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai, 264209;2.Department of Chemistry, Harbin Institute of Technology, Harbin, 150001),Shandong Provincial Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai, 264209,Department of Chemistry, Harbin Institute of Technology, Harbin, 150001,International Department, China Petroleum Pipeline Bureau, Langfang, 065000 and Shandong Provincial Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai, 264209 |
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| Abstract: | AgCu/Ni composite interlayer was used to join SiO2 glass ceramic to Ti-6Al-4V alloy successfully, obtaining the largest joint shear strength 110MPa. Ag, Cu and Ni in the interlayer and Ti in the Ti-6Al-4V alloy affect the joint formation and interfacial products significantly. To understand the joint formation process better, behaviors of elements Ag, Cu, Ni and Ti during the brazing of SiO2 glass ceramic to Ti-6Al-4V alloy were investigated in the present work. Active element Ti is the most important component in the joining, realizing the metallurgical bonding of SiO2 glass ceramic to braze alloy. Cu together with Ni reacts to Ti in the base material by Ti-Cu-Ni ternary eutectic reaction, which is beneficial for reducing the massive Ti-Cu and/or Ti-Ni brittle intermetallic compounds on the joint interface. Dispersion of Ag decreases the brittleness of the whole joint effectively. |
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| Keywords: | ceramic titanium alloys brazing interface |
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