Paper Title:
High-Temperature Diffusion Barrier for Ni-Cr Cast Steel
  Abstract

The study describes aluminium-silicon protective coatings produced by the slurry cementation process on a substrate of creep-resistant Ni-Cr cast steel. The mechanism of the coating growth on a substrate was examined and the effect of annealing time and temperature on total thickness of the coatings and on the thickness of the individual zones was analyzed. The coating structure is composed of two zones. In the external zone, elements like Al, Ni and Fe are concentrated, forming intermetallic phases of an Al(Ni,Fe) type, while the internal zone contains an (Fe,Cr,Si) solution. The internal zone formed in a sub-surface layer of the substrate has hardness values intermediate between the hardness of the substrate and that of the external layer.

  Info
Periodical
Defect and Diffusion Forum (Volumes 312-315)
Edited by
Andreas Öchsner, Graeme E. Murch and João M.P.Q. Delgado
Pages
595-600
DOI
10.4028/www.scientific.net/DDF.312-315.595
Citation
A. Kochmańska, M. Garbiak, "High-Temperature Diffusion Barrier for Ni-Cr Cast Steel", Defect and Diffusion Forum, Vols. 312-315, pp. 595-600, 2011
Online since
April 2011
Export
Price
$32.00
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