Synthesis and Characterization of Multiwalled Carbon Nanotube Reinforced Aluminum Nanocomposite Via Plasma Spraying of Spray Dried Powders

Multiwalled carbon nanotubes (MWNT) reinforced aluminum composite coatings were synthesized by plasma spraying of spraydried powders. Composite coatings 0.5-1.5 mm thick containing 5wt% and 10wt% of MWNT were prepared. CNTs were found to be homogeneously dispersed in the spraydried powder. Coating has a two phase microstructure of a matrix containing evenly distributed MWNTs and MWNT rich regions or clusters. The microstructural evolution is studied by evaluating formation of single splat. CNT distribution has been quantified. Thermodynamic simulations and TEM study reveals formation of carbide as interfacial products. Mechanical properties of composite coatings will also be elucidated.