Improvement of mechanical properties of Sn-58Bi alloy with multi-walled carbon nanotubes |
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| Affiliation: | HE Peng 1,Lü Xiao-chun 1,LIN Tie-song 1,LI Hai-xin 1,AN Jing 2,MA Xin 3,FENG Ji-cai 1,ZHANG Yan 4,LI Qi 4,QIAN Yi-yu 2 1.State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,Harbin 150001,China;2.Department of Materials Science and Engineering,Shenzhen Graduate School,Harbin Institute of Technology,Shenzhen 518055,China;3.Yik Shing Tat Industrial Company Limited,Shenzhen 518055,China;4.CNano Technology (Beijing) Limited,Beijing 100000,China |
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| Abstract: | Carbon nanotubes (CNTs) reinforced Sn-58Bi composites were successfully fabricated through ball-milling method and low temperature melting process.The influence of multi-walled carbon nanotubes (MWCNTs) on the mechanical strength and ductility of Sn-58Bi lead-free alloy was studied.The mechanical test results show that the bending strength of Sn-58Bi-0.03CNTs (mass fraction,%) composite is increased by 10.5% than that of the Sn-58Bi alloy,which can be attributed to the reduction of Sn-rich segregation and the grain refinement.The toughness of Sn-58Bi-0.03CNTs composite is increased by 48.9% than that of the matrix materials.It is indicated that the influence of CNTs on the strength of Sn-58Bi-xCNTs composite is insignificant.In addition,the fracture mechanism of CNTs reinforced Sn Bi composite was analyzed.The corresponding fracture surface comparison between the Sn-58Bi-0.03CNTs composite and the monolithic Sn-58Bi alloy was made to identify the influence of CNTs on the fracture behavior and the reinforcing effect of CNTs. |
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