Effect of Carbon Nanotubes on Properties of Ceramics Based Composite Coatings

Abstract:

In the present work, 2% and 6% carbon nanotubes (CNT) were reinforced in chromium oxide powder and were deposited on T22 steel using high velocity oxy-fuel spraying process. The effect of CNT reinforcement on hardness and porosity was investigated. The hardness was observed to be highest for coating reinforced with 6%CNT and hardness was found to increase with decrease in porosity. The coating microstructure and elements were characterised using field emission scanning electron microscopy (FE-SEM) with energy dispersive spectroscope (EDS), Elemental point analysis and X-ray mapping analysis. The constituents of the coating were identified using X-ray diffractometer. It was found that the CNT were uniformly distributed throughout Cr₂O₃ matrix. The CNT were found to be chemically inert during the spraying process.

• Periodical: Advanced Engineering Forum (Volume 26)
• Pages: 53-66
• DOI: https://doi.org/10.4028/www.scientific.net/AEF.26.53
• Online since: February 2018
• Authors: Khushdeep Goyal*, Hazoor Singh, Rakesh Bhatia
• Keywords: Carbon Nanotubes, Hardness, Porosity, SEM/EDAX, XRD

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