Synthesis and Characterization of Multi Wall Carbon Nanotubes (MWCNT) Reinforced Sintered Magnesium Matrix Composites

Abstract

Metal matrix composites (MMCs) reinforced with ceramic nano particles (less than 100 nm), termed as metal matrix nano composites (MMNCs), can overcome those disadvantages associated with the conventional MMCs. MMCs containing carbon nanotubes are being developed and projected for diverse applications in various fields of engineering like automotive, avionic, electronic and bio-medical sectors. The present investigation deals with the synthesis and characterization of hybrid magnesium matrix reinforced with various different wt% (0-0.45) of multi wall carbon nano tubes (MWCNT) and micro SiC particles prepared through powder metallurgy route. Microstructure and mechanical properties such as micro hardness and density of the composites were examined. Microstructure of MMNCs have been investigated by scanning electron microscope, X-ray diffraction and energy dispersive X-ray spectroscopy (EDS) for better observation of dispersion of reinforcement. The results indicated that the increase in wt% of MWCNT improves the mechanical properties of the composite.

Effect of Carbon Nanotubes on Properties of Ceramics Based Composite Coatings

“…CNT were able to fill the voids in between the Cr 2 O 3 particles due to enhanced melting, which has led to increase in hardness of composite coatings with increase in CNT content. Feng et al [19], Bhaskar et al [29] and Anand and Natarajan [24] have revealed that increase in hardness of CNT reinforced composites is due to suppression of crack formation and enhanced dispersion hardening. The increment in hardness of composite coatings has strongly confirmed the role of CNT reinforcement as reported in the literature [30][31][32].…”