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Coating of graphite flakes with MgO/carbon nanocomposite via gas state reaction

Sharif, M ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jallcom.2010.03.202
  3. Publisher: 2010
  4. Abstract:
  5. Coating of graphite flakes with MgO/carbon nanocomposite was carried out via gaseous state reaction between mixture of Mg metal, CO gas and graphite flakes at 1000 °C. XRD and FE-SEM analysis of coating showed that the coating was comprised of MgO nano particles and amorphous carbon distributed smoothly and covered the graphite surface evenly. Thermodynamic calculations were employed to predict the reaction sequences as well as phase stability. The effect of coating on water wettability and oxidation resistance of graphite was studied using contact angle measurement and TG analysis, respectively. It was demonstrated that the reaction between Mg and CO could result in MgO/C nanocomposite deposition. The coating improved water wettability of graphite and also enhanced the oxidation resistance of graphite flakes significantly. Also the graphite coating showed significant phenolic resin-wettabilty owing to high surface area of such hydrophilic nano composite coating. The importance of graphite coating is explained with emphasis on its potential application in graphite containing refractories
  6. Keywords:
  7. MgO/C nanocomposite ; Gas-state reaction ; Gaseous reaction ; Gaseous state ; Graphite flakes ; Graphite surfaces ; High surface area ; Nano-composite coating ; Potential applications ; Reaction sequences ; SEM analysis ; Thermodynamic calculations ; Water wettability ; XRD ; Amorphous carbon ; Angle measurement ; Composite coatings ; Contact angle ; Nanocomposites ; Oxidation ; Oxidation resistance ; Phase stability ; Phenolic resins ; Phenols ; Resins ; Graphite
  8. Source: Journal of Alloys and Compounds ; Volume 500, Issue 1 , June , 2010 , Pages 74-77 ; 09258388 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0925838810007231