Numerical Simulation for Surface Modification of Thermal Barrier Coatings by High-Current Pulse Electron Beam

Abstract:

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High current pulsed electron beam is an effective technique for surface sealing of ceramic thermal barrier coatings prepared by electron beam physical vapor deposition. Due to the rapid remelting and solidification, the outer layers of ceramic coatings become smooth and dense, and the protective performance for turbine blades is effectively improved. Because of the complex multi-layered structures in the coatings, a high-current pulsed electron beam treatment requires specific parameter inputs which are related to the temperature field induced by electron energy deposition in the coatings. In this paper, a two-dimensional temperature simulation was performed to demonstrate the melting depth and temperature evolution in ceramic coatings treated by high-current pulsed electron beam. Different energy densities and pulses were studied and discussed for obtaining optimized parameters.

Info:

Periodical:

Materials Science Forum (Volumes 654-656)

Main Theme:

Edited by:

Jian-Feng Nie and Allan Morton

Pages:

1807-1810

DOI:

10.4028/www.scientific.net/MSF.654-656.1807

Citation:

Y. Qin et al., "Numerical Simulation for Surface Modification of Thermal Barrier Coatings by High-Current Pulse Electron Beam", Materials Science Forum, Vols. 654-656, pp. 1807-1810, 2010

Online since:

June 2010

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$35.00

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