Han Zhaohui, Zhu Peixian, Liu Jianhua, Koppala Sivasankar, Xu Lei, Zhang Libo, Kannan Chandrasekar Srinivasa
Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology Kunming 650093 PR China
State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology Kunming 650093 PR China
RSC Adv. 2018 Aug 15;8(51):29147-29154. doi: 10.1039/c8ra04977g. eCollection 2018 Aug 14.
The use of Pb/Sn/Al composite anode materials has been limited due to the thermodynamic immiscibility between Pb and Al sheets during the welding process. Thus, herein, Sn has been added between Pb and Al sheets to fabricate a Pb/Sn/Al laminated composite vacuum hot-pressing welding (at a temperature of 230 °C for 12 h under 0.5 MPa). Furthermore, the interfacial microstructure and mechanical and electrical properties are investigated. Good metallurgical bonding has been realized due to the addition of Sn, and block α-Pb and a small amount of β-Sn solid solutions are also formed at the interface. In comparison with the Pb-Ag alloy anode, the Pb/Sn/Al laminated composite presents superior mechanical strength (73.9 MPa), and good electrical conductivity of the Pb/Sn/Al composite has been obtained due to its sandwich laminated structure. Moreover, the Pb/Sn/Al composite reduces the electrode reaction energy and improves the electrocatalytic activity of the electrode to reduce the bath voltage.
由于在焊接过程中铅和铝板之间存在热力学不混溶性，铅/锡/铝复合阳极材料的使用受到限制。因此，在此在铅板和铝板之间添加了锡，以制造铅/锡/铝层压复合真空热压焊接件（在230℃的温度下于0.5MPa压力下保持12小时）。此外，还研究了其界面微观结构以及机械和电学性能。由于添加了锡，实现了良好的冶金结合，并且在界面处还形成了块状α-Pb和少量β-Sn固溶体。与铅-银合金阳极相比，铅/锡/铝层压复合材料具有优异的机械强度（73.9MPa），并且由于其三明治层压结构，铅/锡/铝复合材料具有良好的导电性。此外，铅/锡/铝复合材料降低了电极反应能量并提高了电极的电催化活性，从而降低了槽电压。
