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Thermal stability of coherent Pd/TiAl interfaces studied from first-principles calculations and experiments

  • F. Wang and H. R. Gong
Published/Copyright: June 11, 2013
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Abstract

Both first-principles molecular-dynamics calculations and experimental observations reveal that the coherent Pd/TiAl interfaces with various orientations are all thermally stable after annealing at 773 K, which seems good for the lifetime of Pd/TiAl membranes. It is found that the bond strength of the Pd/TiAl interface at 773 K becomes slightly smaller than the corresponding value at 0 K, and the interface dipole formed at 773 K seems marginally smaller than that at 0 K. In addition, calculations also show that the bond lengths of Pd/TiAl interfaces after annealing at 773 K become oscillated due to thermal vibrations, which are quite different from those at 0 K.


1 Correspondence address: Prof. H. R. Gong, School of Materials Science and EngineeringNanChang HangKong UniversityNanChang, 330063China, Fax: 86-791-86453201, E-mail:

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Received: 2011-10-2
Accepted: 2012-2-11
Published Online: 2013-06-11
Published in Print: 2012-10-01

© 2012, Carl Hanser Verlag, Munich

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