Influence of Carbon Nanotubes on the Physical and Mechanical Behaviours of Magnesium

The powder metallurgy technique was used to synthesize magnesium reinforced with up to 0.3 weight percentage of carbon nanotubes (CNTs). The nanocomposites fabricated were extruded at an extrusion ratio of 20.25:1 and then characterized for their physical and mechanical properties. The influences of carbon nanotubes on the physical and mechanical properties of Mg were investigated. The thermomechanical property characterization shows an increase in thermal stability of the Mg nanocomposites with increasing amount of CNTs added. Mechanical property results reveal an improvement in yield strength, ductility and work of fracture with higher weight percentages of CNTs incorporated. An attempt is made to correlate the physical and mechanical properties with the increasing weight fractions of carbon nanotubes in pure Mg matrix.Copyright © 2005 by ASME

[1]  M. Gupta,et al.  Effect of type of primary processing on the microstructure, CTE and mechanical properties of magnesium/alumina nanocomposites , 2006 .

[2]  S. Agnew,et al.  Plastic anisotropy and the role of non-basal slip in magnesium alloy AZ31B , 2005 .

[3]  M. Gupta,et al.  Development of high performance magnesium nano-composites using nano-Al2O3 as reinforcement , 2005 .

[4]  J. Yang,et al.  Mechanical spectroscopy of Mg reinforced with Al2O3 short fibers and C nanotubes , 2004 .

[5]  T. Srivatsan,et al.  The tensile behavior of two magnesium alloys reinforced with silicon carbide particulates , 2003 .

[6]  S. Frankland,et al.  Transverse mechanical properties of single-walled carbon nanotube crystals. Part I: determination of elastic moduli , 2003 .

[7]  M. Gupta,et al.  Development of ductile magnesium composite materials using titanium as reinforcement , 2002 .

[8]  C. Klinke,et al.  Carbon nanotube films as electron field emitters , 2002 .

[9]  R. Byron Pipes,et al.  Helical carbon nanotube arrays: mechanical properties , 2002 .

[10]  Kun Wu,et al.  Effect of interfacial reaction on mechanical behavior of SiCw/AZ91 magnesium matrix composites , 2001 .

[11]  Yi-long Bai,et al.  Size-dependent inelastic behavior of particle-reinforced metal–matrix composites , 2001 .

[12]  M. Gupta,et al.  Synthesis, microstructure and properties characterization of disintegrated melt deposited Mg/SiC composites , 2000 .

[13]  A. Luo.  Processing, microstructure, and mechanical behavior of cast magnesium metal matrix composites , 1995 .

[14]  X. B. Zhang,et al.  Carbon nano-tubes; their formation process and observation by electron microscopy , 1993 .

[15]  P. Withers,et al.  An introduction to metal matrix composites , 1993 .

[16]  R. Arsenault,et al.  Dislocation generation due to differences between the coefficients of thermal expansion , 1986 .

[17]  P. Kelly.  The effect of particle shape on dispersion hardening , 1972 .