Paper Title:
Hf Modified NiAl Bond Coat for Thermal Barrier Coating Application
  Abstract

The Hf doped NiAl coatings were co-evaporated and co-deposited onto the superalloy substrate by electron beam physical vapor deposition (EB-PVD). During heat-treatment, HfO2 was formed on the NiAl coatings. And, Hf enriched at the interface between the coating and the interdiffusion zone, which could prevent outward diffusion of elements in the substrate. The NiAl coating doped with 0.5% Hf effectively improved the high temperature oxidation resistance compared to the Hf free NiAl coating and the high Hf content coating. Also, the addition of Hf to the coating contributed to enhancing the adherence of TGO layer to coating.

  Info
Periodical
Materials Science Forum (Volumes 546-549)
Edited by
Yafang Han et al.
Pages
1777-1780
DOI
10.4028/www.scientific.net/MSF.546-549.1777
Citation
L. D. Sun, H. B. Guo, H. F. Li, S. K. Gong, "Hf Modified NiAl Bond Coat for Thermal Barrier Coating Application", Materials Science Forum, Vols. 546-549, pp. 1777-1780, 2007
Online since
May 2007
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Price
$32.00
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