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| Abstract No.: |
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Scheduled at:
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Tuesday, May 04, 2010, Sophia Room 2:35 PM
Young Scientists
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| Title: |
Process map for plasma sprayed carbon nanotube reinforced aluminum oxide nanocomposite coatings
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| Authors: |
Anup Kumar Keshri* / Florida International University, USA
Riken Patel / Florida International University, USA
Arvind Agarwal/ Florida International University, USA
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| Abstract: |
Process maps have been developed for plasma sprayed Aluminum oxide (Al2O3) coatings with and without carbon nanotube (CNT) reinforcement. These process maps correlates the key processing variables such as plasma power, powder feed rate, primary gas flow rate, and stand-off distance to the density and hardness of the coatings. Temperature and velocity of the in-flight particles were also measured at different combinations of processing parameters and correlated to density and hardness of the coatings. Process maps showed that CNTs has significant effect on the temperature and velocity of in-flight particles. Higher thermal conductivity of CNTs alters the heat transfer phenomena during the coating build up which assists in densification. Empirical models were developed relating the processing parameters to the density of the coating. Stand-off distance was found to be most critical parameter which affects the porosity of the plasma sprayed coatings.
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