Journal
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
Volume 22, Issue -, Pages S692-S696Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S1003-6326(12)61788-9
Keywords
carbon nanotubes; metal-matrix composites; mechanical properties; fracture mechanism
Categories
Funding
- National Natural Science Foundation of China [51105107, 51021002, 51275135]
- Natural Science Foundation of Heilongjiang Province, China [QC2011C044]
- Fundamental Research Funds for the Central Universities, China [HIT.BRET1.2010006, HIT.NSRIF.2010119, HIT.NSRIF.201135]
- Specialized Research Fund for the Doctoral Program of Higher Education, China [20112302130005]
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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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