Microstructure and properties of Ag/SnO2 functional material manufactured by selective laser melting  

作　　者：Yuanjie Zhang Bo Song Xiao Zhao Yusheng Shi 

机构地区：[1]State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology

出　　处：《Nano Materials Science》2019年第3期208-214,共7页纳米材料科学（英文版）

基　　金：sponsored by the Natural Science Foundation of China (Grant nos. 51775208);the Hubei Science Fund for Distinguished Young Scholars (No. 0216110085);the National Key Research and Development Program “Additive Manufacturing and Laser Manufacturing”(No. 2016YFB1100101);Wuhan Morning Light Plan of Youth Science and Technology (No. 0216110066);the Academic frontier youth team at Huazhong University of Science and Technology (HUST)

摘　　要：Ag/SnO2,as a promising and environment-friendly electrical contact material,is widely applied in low-voltage apparatus.But the properties of Ag/SnO2 composites is difficult to improve due to the poor distribution phases and difficult component design.In this work,the Ag/SnO2 composites are prepared by selective laser melting.To get better performance,Ag/SnO2 composites with different energy density were studied.The microstructure was observed by field emission scanning electron microscope.In addition,reinforced SnO2 phase was characterized by X-ray diffraction and transmission electron microscope.The results indicated that the microstructure,relative density and hardness of are influenced by energy density,while Ag/SnO2 composites with homogeneous microstructure,high relative density,higher hardness and lower electrical resistivity can be obtained by proper energy density(E?68 J/mm^3).Ag/SnO2, as a promising and environment-friendly electrical contact material, is widely applied in low-voltage apparatus. But the properties of Ag/SnO2 composites is difficult to improve due to the poor distribution phases and difficult component design. In this work, the Ag/SnO2 composites are prepared by selective laser melting. To get better performance, Ag/SnO2 composites with different energy density were studied. The microstructure was observed by field emission scanning electron microscope. In addition, reinforced SnO2 phase was characterized by X-ray diffraction and transmission electron microscope. The results indicated that the microstructure, relative density and hardness of are influenced by energy density, while Ag/SnO2 composites with homogeneous microstructure, high relative density, higher hardness and lower electrical resistivity can be obtained by proper energy density（E=68 J/mm3）.

关 键 词：SELECTIVE laser MELTING AG/SNO2 COMPOSITES Electrical CONTACT material 

分 类 号：TB[一般工业技术]