Characterisation of Plasma Sprayed CNT-Alumina Composite Coatings on Boiler Tube Steel

Abstract

In this research work, the 1.5, 2 and 4 wt.% CNTs-Al₂O₃ coatings were prepared and successfully deposited on T22 boiler tube steel using plasma spray process. Ni-Cr was also used as bond coat before applying CNTs-Al₂O₃ coatings. The coatings were subjected to metallography, XRD and SEM/EDAX analysis. The porosity of CNTs-Al₂O₃ mixed coatings on T22 boiler steel was found to be decreasing with increase in CNTs content. The CNTs were found to be uniformly distributed within the Al₂O₃ matrix. The CNTs were chemically stable during the spray forming and did not react to form oxides or aluminium carbides even at very high processing temperature.

Cite this Article

Rakesh Goyal, Buta Singh Sidhu, Vikas Chawla. Characterisation of Plasma Sprayed CNT-Alumina Composite Coatings on Boiler Tube Steel. Journal of Polymer & Composites. 2017; 5(3): 1–17p.