Improvement of mechanical properties of Sn-58Bi alloy with multi-walled carbon nanotubes

• Published in: Transactions of Nonferrous Metals Society of China 2012-12, Vol.22 (S3), p.692-696
• Main Authors: HE, Peng, LÜ, Xiao-chun, LIN, Tie-song, LI, Hai-xin, AN, Jing, MA, Xin, FENG, Ji-cai, ZHANG, Yan, LI, Qi, QIAN, Yi-yu
• Format: Article
• Language: English
• Subjects: carbon; carbon nanotubes; composites; fracture; fracture mechanism; mechanical; mechanical properties; mechanism; metal-matrix; metal-matrix composites; nanotubes; properties
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(12)61788-9

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.